Problems with custom amp...

Discussion in 'rec.music.guitar' started by Jack A. Zucker, Aug 20, 2003.

  1. I'm also trying to look at the bright side of things. Yes - I got a crappy
    boutique amp but on the other hand, I'm learning a lot and because it's not
    an old fender or marshall, I don't feel bad about tinkering and making
    changes.

    After I get this all straightened out, I'm going to build an amp from
    scratch...

    I do wish the guy had more of a comittment to quality. He did try to help me
    as much as he could. It was just that he has a very odd sense of quality.

    Jaz

    "Greg D" <oasysco@cox.net> wrote in message
    news:Xns93DDC089921CEoasyscocoxnet@68.1.17.6...
    > Jack,
    >
    > I wish I could offer a solution, but all I can do is stand there and
    > cluck my tongue - totally in sympathy with you.
    >
    > THe thing is hand-wired and if he has a schematic, you might try RonSonic
    > (Ron Bales), Phil the AMp MEdic, or even LV over at AGA where I know you
    > hang out as well. Has anybody in AGA been any help, Jack?
    >
    > THankfully, you know enough about circuits to have a fighting chance. Me?
    > I don't know what I"d do other than bitch 'n moan a whole lot louder than
    > you.
    >
    > Keep us posted.
    >
    > GReg
    >
    > > Well,
    > >
    > > What can I do?!? Even though I agree it's a total ripoff, it's not out
    > > of the ordinary for an amp maker to charge you shipping when you
    > > return an item. I pointed out to this guy that it wasn't just that I
    > > didn't like it or that I changed my mind. This thing had VERY serious
    > > design problems. He was non-plussed. My choice was keep it and the
    > > $200 or send it back minus all the shipping which came to a
    > > considerable amount because the first one was returned fed-ex
    > > next-day-air (at his request and promise to pay)...
    > >
    > > Anyway, we're way off topic. I'm trying to get opinions on how to fix
    > > the technical issues. The only reason I went into such detail is that
    > > the last time I tried to only disclose part of the information, I was
    > > accused of being a troll. (See my post about 6V6 tubes and the 5Y3 in
    > > a 6L6 amp for details) :)
    > >
    > > "Greg D" <oasysco@cox.net> wrote in message
    > > news:Xns93DDBC44DC916oasyscocoxnet@68.1.17.6...
    > >> Jack,
    > >>
    > >> That is just too much crap to go thru for a new amp. I complaiend
    > >> aobut my new amps when I had to swpa out a speaker or th preamp
    > >> tubes, but what you are going through - whew...
    > >>
    > >> Greg
    > >>
    > >> > I bought this thing from a small amp builder. I thought it was a
    > >> > good deal. Let me just say that folks were right and that you get
    > >> > what you pay for.
    > >> >
    > >> > Anyway, it's basically a 50 watt Fender Reverb, single channel
    > >> > style amp. 375-0-375 PT, GZ34 rectifier, 2 6L6, (2) AX7 and (2) AT7
    > >> > tubes, big BF Bassman size output transformer, no choke, yada-yada.
    > >> > Slight variations upon the AB763 circuit, minus the vibrato.
    > >> >
    > >> > This thing has been a nightmare from the beginning. Speaker that
    > >> > didn't fit, power tranny center-tap not connected, ground side of
    > >> > screen supply filter cap not connected, cold solder joints, non
    > >> > shielded wires going to the dwell control (causing squealing),
    > >> > power tranny getting EXTREMELY hot, power supply and screen grid
    > >> > caps rated at 450V though they are seeing 475V, yada-yada.
    > >> >
    > >> > I've got everything fixed (including changing all audio components
    > >> > to AB763 values). The outstanding issues are the power transformer
    > >> > overheating and the underrated filter supply caps. I have a quad of
    > >> > 350V 100uf caps on order to run in a totem-pole arrangement
    > >> > (original value was 47uf) but I'm not sure how I'll fit them in
    > >> > because they are currently on the board and there's not room for 4,
    > >> > side by side or 2 stacked (it's a 2" high chassis and the board is
    > >> > .75" up from the bottom. One idea is to cut holes in the board and
    > >> > stack the caps using cable ties and RTV to hold them together.
    > >> > There's no room under the chassi unless I want to mount the 4 caps
    > >> > on the opposite underside of the chassis from the power tranny.
    > >> >
    > >> > Another option would be to play it close to the hilt and try to
    > >> > find 47uf 500V caps or somehow try to fit an LCR 50uf/50uf 500V can
    > >> > inside the chassis. Not sure I want to drill a huge hole in the
    > >> > chassis and even if I do, I'd have to put it on the opposite side
    > >> > due to space considerations...
    > >> >
    > >> > The other possibly larger problem is the power transformer. It's
    > >> > made by handwound transformers.com. I've heard many nightmares
    > >> > about them. It's a 375-0-375 tranny and it's rated for 6A on the
    > >> > heater tap and 3A on the rectifier tap. Even at practice volumes
    > >> > and a fan blowing on the tubes and the transformer, it get so hot
    > >> > that the chassis is almost too hot to touch. The fan keeps the
    > >> > tubes very cool so I know know it's the transformer itself.
    > >> >
    > >> > I tried putting in a weber copper cap to see if not drawing down
    > >> > the
    > >> > rectifier heater would make a difference. Since this transformer is
    > >> > a tad too hot for my use, I think I may look into getting a decent
    > >> > quality 350-0-350 transformer. Something like the Hammond 273X
    > >> > (120VA, sec. 350-0-350, DC ma 110, Fil.#1(rct) 5.0v @ 2a,
    > >> > Fil.#2(htr) 6.3v @ 4.0a ct)
    > >> >
    > >> > If I wanted to ditch the rectifier tube and go with a full wave
    > >> > bridge rectifier (w/no centertap), In that case since I wouldn't be
    > >> > using the rectifier tube I'd probably go with a 330-330 of 340-340
    > >> > transformer. anyone have any recommendations? Yes, I know I should
    > >> > use google. I will
    > >>
    > >>
    > >> >
    > >> > P.S.
    > >> >
    > >> > I don't want to go off on a tangent but this one is the 2nd amp I
    > >> > got from him. The first one had even more problems. I could have
    > >> > returned this amp but I would have been charged shipping 4 ways
    > >> > (for 2 amps) including fedex overnight to get the first one back so
    > >> > we worked out a deal where he sent me a $200 rebate and I agreed to
    > >> > fix the amp myself...
    > >> >
    > >> > P.P.S.
    > >> >
    > >> > I hope this is enough information. I don't want to get accused of
    > >> > trolling again... :)
    > >> >
    > >> >
    > >>

    > >
    > >
    > >

    >
  2. don judy

    don judy Guest

    "Jack A. Zucker" <jaz@jackzucker.com> wrote in message
    news:emT0b.13211$2Y6.4156135@news2.news.adelphia.net...
    > I'm also trying to look at the bright side of things. Yes - I got a crappy
    > boutique amp but on the other hand, I'm learning a lot and because it's

    not
    > an old fender or marshall, I don't feel bad about tinkering and making
    > changes.
    >
    > After I get this all straightened out, I'm going to build an amp from
    > scratch...
    >
    > I do wish the guy had more of a comittment to quality. He did try to help

    me
    > as much as he could. It was just that he has a very odd sense of quality.
    >
    > Jaz
    >
    > "Greg D" <oasysco@cox.net> wrote in message
    > news:Xns93DDC089921CEoasyscocoxnet@68.1.17.6...
    > > Jack,
    > >
    > > I wish I could offer a solution, but all I can do is stand there and
    > > cluck my tongue - totally in sympathy with you.
    > >
    > > THe thing is hand-wired and if he has a schematic, you might try

    RonSonic
    > > (Ron Bales), Phil the AMp MEdic, or even LV over at AGA where I know you
    > > hang out as well. Has anybody in AGA been any help, Jack?
    > >
    > > THankfully, you know enough about circuits to have a fighting chance.

    Me?
    > > I don't know what I"d do other than bitch 'n moan a whole lot louder

    than
    > > you.
    > >
    > > Keep us posted.
    > >
    > > GReg
    > >
    > > > Well,
    > > >
    > > > What can I do?!? Even though I agree it's a total ripoff, it's not out
    > > > of the ordinary for an amp maker to charge you shipping when you
    > > > return an item. I pointed out to this guy that it wasn't just that I
    > > > didn't like it or that I changed my mind. This thing had VERY serious
    > > > design problems. He was non-plussed. My choice was keep it and the
    > > > $200 or send it back minus all the shipping which came to a
    > > > considerable amount because the first one was returned fed-ex
    > > > next-day-air (at his request and promise to pay)...


    He sold you a freakin' hotplate instead of an amp and he wants
    you to pay shipping to exchange it for a real amp? He should
    pay you interest on the amount of time he has your money.


    dj



    >
    >
  3. RonSonic

    RonSonic Guest

    On Wed, 20 Aug 2003 22:42:54 GMT, "Jack A. Zucker" <jaz@jackzucker.com> wrote:

    >Well,
    >
    >What can I do?!? Even though I agree it's a total ripoff, it's not out of
    >the ordinary for an amp maker to charge you shipping when you return an
    >item. I pointed out to this guy that it wasn't just that I didn't like it or
    >that I changed my mind. This thing had VERY serious design problems. He was
    >non-plussed. My choice was keep it and the $200 or send it back minus all
    >the shipping which came to a considerable amount because the first one was
    >returned fed-ex next-day-air (at his request and promise to pay)...
    >
    >Anyway, we're way off topic. I'm trying to get opinions on how to fix the
    >technical issues. The only reason I went into such detail is that the last
    >time I tried to only disclose part of the information, I was accused of
    >being a troll. (See my post about 6V6 tubes and the 5Y3 in a 6L6 amp for
    >details) :)


    Oh shit.

    Didn't connect the threads. Oh shit. No wonder the guy said 6V6 would work fine,
    he apparently will say anything.

    Get a more suitable tranny first. Then a lot of the voltage issues will answer
    themselves. It's a 50W Fender clone, shove a 50W Fender tranny in there. Then
    you'll have 50W Fender voltages and those caps will work.

    Had a BF Pro Reverb in the shop today - never met this model before. I am very
    impressed. This is what your amp should aspire to.

    Ron




    >"Greg D" <oasysco@cox.net> wrote in message
    >news:Xns93DDBC44DC916oasyscocoxnet@68.1.17.6...
    >> Jack,
    >>
    >> That is just too much crap to go thru for a new amp. I complaiend aobut
    >> my new amps when I had to swpa out a speaker or th preamp tubes, but what
    >> you are going through - whew...
    >>
    >> Greg
    >>
    >> > I bought this thing from a small amp builder. I thought it was a good
    >> > deal. Let me just say that folks were right and that you get what you
    >> > pay for.
    >> >
    >> > Anyway, it's basically a 50 watt Fender Reverb, single channel style
    >> > amp. 375-0-375 PT, GZ34 rectifier, 2 6L6, (2) AX7 and (2) AT7 tubes,
    >> > big BF Bassman size output transformer, no choke, yada-yada. Slight
    >> > variations upon the AB763 circuit, minus the vibrato.
    >> >
    >> > This thing has been a nightmare from the beginning. Speaker that
    >> > didn't fit, power tranny center-tap not connected, ground side of
    >> > screen supply filter cap not connected, cold solder joints, non
    >> > shielded wires going to the dwell control (causing squealing), power
    >> > tranny getting EXTREMELY hot, power supply and screen grid caps rated
    >> > at 450V though they are seeing 475V, yada-yada.
    >> >
    >> > I've got everything fixed (including changing all audio components to
    >> > AB763 values). The outstanding issues are the power transformer
    >> > overheating and the underrated filter supply caps. I have a quad of
    >> > 350V 100uf caps on order to run in a totem-pole arrangement (original
    >> > value was 47uf) but I'm not sure how I'll fit them in because they are
    >> > currently on the board and there's not room for 4, side by side or 2
    >> > stacked (it's a 2" high chassis and the board is .75" up from the
    >> > bottom. One idea is to cut holes in the board and stack the caps using
    >> > cable ties and RTV to hold them together. There's no room under the
    >> > chassi unless I want to mount the 4 caps on the opposite underside of
    >> > the chassis from the power tranny.
    >> >
    >> > Another option would be to play it close to the hilt and try to find
    >> > 47uf 500V caps or somehow try to fit an LCR 50uf/50uf 500V can inside
    >> > the chassis. Not sure I want to drill a huge hole in the chassis and
    >> > even if I do, I'd have to put it on the opposite side due to space
    >> > considerations...
    >> >
    >> > The other possibly larger problem is the power transformer. It's made
    >> > by handwound transformers.com. I've heard many nightmares about them.
    >> > It's a 375-0-375 tranny and it's rated for 6A on the heater tap and 3A
    >> > on the rectifier tap. Even at practice volumes and a fan blowing on
    >> > the tubes and the transformer, it get so hot that the chassis is
    >> > almost too hot to touch. The fan keeps the tubes very cool so I know
    >> > know it's the transformer itself.
    >> >
    >> > I tried putting in a weber copper cap to see if not drawing down the
    >> > rectifier heater would make a difference. Since this transformer is a
    >> > tad too hot for my use, I think I may look into getting a decent
    >> > quality 350-0-350 transformer. Something like the Hammond 273X (120VA,
    >> > sec. 350-0-350, DC ma 110, Fil.#1(rct) 5.0v @ 2a, Fil.#2(htr) 6.3v @
    >> > 4.0a ct)
    >> >
    >> > If I wanted to ditch the rectifier tube and go with a full wave bridge
    >> > rectifier (w/no centertap), In that case since I wouldn't be using the
    >> > rectifier tube I'd probably go with a 330-330 of 340-340 transformer.
    >> > anyone have any recommendations? Yes, I know I should use google. I
    >> > will

    >>
    >>
    >> >
    >> > P.S.
    >> >
    >> > I don't want to go off on a tangent but this one is the 2nd amp I got
    >> > from him. The first one had even more problems. I could have returned
    >> > this amp but I would have been charged shipping 4 ways (for 2 amps)
    >> > including fedex overnight to get the first one back so we worked out a
    >> > deal where he sent me a $200 rebate and I agreed to fix the amp
    >> > myself...
    >> >
    >> > P.P.S.
    >> >
    >> > I hope this is enough information. I don't want to get accused of
    >> > trolling again... :)
    >> >
    >> >

    >>

    >
  4. "RonSonic" <ronsonic@tampabay.rr.com> wrote in message
    news:g1pakv8onng0glntm19dp7qonujt6ps4k5@4ax.com...
    > Get a more suitable tranny first. Then a lot of the voltage issues will

    answer
    > themselves. It's a 50W Fender clone, shove a 50W Fender tranny in there.

    Then
    > you'll have 50W Fender voltages and those caps will work.
    >
    > Had a BF Pro Reverb in the shop today - never met this model before. I am

    very
    > impressed. This is what your amp should aspire to.


    I'd like to do that but I'd have to cut the chassis to put a lay-down
    transformer in there. Hammond makes an upright transformer rated at 115V,
    325-0-325 but it's only rated for 150MA and I'm not sure that's enough for
    this amp.
  5. stringbend

    stringbend Guest

    "Jack A. Zucker" <jaz@jackzucker.com> wrote in message news:<wUe1b.14278$2Y6.4458606@news2.news.adelphia.net>...

    > I'd like to do that but I'd have to cut the chassis to put a lay-down
    > transformer in there. Hammond makes an upright transformer rated at 115V,
    > 325-0-325 but it's only rated for 150MA and I'm not sure that's enough for
    > this amp.


    Hi Jack:

    AES sells many flavors of Hammond trannys. I believe the one you are
    looking at is undersized for your needs, just as you suggest. I
    haven't kept track of this entire thread so I don't know your complete
    requirements but the 272JX ought to do you right.

    Note that Hammonds are spec'd at either 115 or 117 (I've seen both in
    print). In either case, if your venue is 124-127 like my house you
    will have higher secondary voltages than what you might otherwise
    expect. Thus, if you were willing to live with a *little* less
    voltage (and closer to the edge of what you need current-wise) the
    270HX is also a viable alternative.
    (weighs less too!).

    The tranny they sell for 50W Marshalls (P-TM050) might also be a good
    choice.

    Good luck,
    stringbend
  6. Thanks for your help on this issue. However, the guy who built this amp for
    me in the first place has agreed to refund my money so it looks like I won't
    need to rebuild it afterall. It was a good learning project but there were
    too many poorly engineered parts of this design.

    Thanks for all your time and trouble. I'm going to save the information
    anyway because I'm going to build an amp from scratch over the next 6
    months.

    Jaz

    ----- Original Message -----
    From: "stringbend" <stringbend@aol.com>
    Newsgroups:
    alt.guitar.amps,rec.music.makers.guitar,rec.music.makers.guitar.jazz
    Sent: Saturday, August 23, 2003 2:17 PM
    Subject: Re: Problems with custom amp...


    > "Jack A. Zucker" <jaz@jackzucker.com> wrote in message

    news:<wUe1b.14278$2Y6.4458606@news2.news.adelphia.net>...
    >
    > > I'd like to do that but I'd have to cut the chassis to put a lay-down
    > > transformer in there. Hammond makes an upright transformer rated at

    115V,
    > > 325-0-325 but it's only rated for 150MA and I'm not sure that's enough

    for
    > > this amp.

    >
    > Hi Jack:
    >
    > AES sells many flavors of Hammond trannys. I believe the one you are
    > looking at is undersized for your needs, just as you suggest. I
    > haven't kept track of this entire thread so I don't know your complete
    > requirements but the 272JX ought to do you right.
    >
    > Note that Hammonds are spec'd at either 115 or 117 (I've seen both in
    > print). In either case, if your venue is 124-127 like my house you
    > will have higher secondary voltages than what you might otherwise
    > expect. Thus, if you were willing to live with a *little* less
    > voltage (and closer to the edge of what you need current-wise) the
    > 270HX is also a viable alternative.
    > (weighs less too!).
    >
    > The tranny they sell for 50W Marshalls (P-TM050) might also be a good
    > choice.
    >
    > Good luck,
    > stringbend
  7. Nobody

    Nobody Guest

    Jack A. Zucker <jaz@jackzucker.com> wrote in article <NgO1b.15769$2Y6.4937823@news2.news.adelphia.net>...
    > Thanks for your help on this issue. However, the guy who built this amp for
    > me in the first place has agreed to refund my money so it looks like I won't
    > need to rebuild it afterall.


    Well awesome, man.

    --
    Jason
    http://www.geocities.com/nobody_upstairs
  8. Yeah, what ultimately made him do the right thing?

    Regards,

    Margaret

    "Nobody" <nobodyupstairs@aolDELETE.com> wrote in message
    news:01c369ae$ac2d9400$b9c2580c@715162529worldnet.att.net...
    >
    >
    > Jack A. Zucker <jaz@jackzucker.com> wrote in article

    <NgO1b.15769$2Y6.4937823@news2.news.adelphia.net>...
    > > Thanks for your help on this issue. However, the guy who built this amp

    for
    > > me in the first place has agreed to refund my money so it looks like I

    won't
    > > need to rebuild it afterall.

    >
    > Well awesome, man.
    >
    > --
    > Jason
    > http://www.geocities.com/nobody_upstairs
    >
  9. Jack A. Zucker wrote:
    > Thanks for your help on this issue. However, the guy who built this amp for
    > me in the first place has agreed to refund my money so it looks like I won't
    > need to rebuild it afterall. It was a good learning project but there were
    > too many poorly engineered parts of this design.
    >
    > Thanks for all your time and trouble. I'm going to save the information
    > anyway because I'm going to build an amp from scratch over the next 6
    > months.
    >
    > Jaz
    >


    Yes! That is really good news, Jack.

    Cheers,

    :)

    Cat
  10. Zorro_2K

    Zorro_2K Guest

    I'm beginning to think that you post just to have something to read...


    "Jack A. Zucker" <jaz@jackzucker.com> wrote in message
    news:%UK0b.13015$2Y6.4057255@news2.news.adelphia.net...
    > I bought this thing from a small amp builder. I thought it was a good

    deal.
    > Let me just say that folks were right and that you get what you pay for.
    >
    > Anyway, it's basically a 50 watt Fender Reverb, single channel style amp.
    > 375-0-375 PT, GZ34 rectifier, 2 6L6, (2) AX7 and (2) AT7 tubes, big BF
    > Bassman size output transformer, no choke, yada-yada. Slight variations

    upon
    > the AB763 circuit, minus the vibrato.
    >
    > This thing has been a nightmare from the beginning. Speaker that didn't

    fit,
    > power tranny center-tap not connected, ground side of screen supply filter
    > cap not connected, cold solder joints, non shielded wires going to the

    dwell
    > control (causing squealing), power tranny getting EXTREMELY hot, power
    > supply and screen grid caps rated at 450V though they are seeing 475V,
    > yada-yada.
    >
    > I've got everything fixed (including changing all audio components to

    AB763
    > values). The outstanding issues are the power transformer overheating and
    > the underrated filter supply caps. I have a quad of 350V 100uf caps on

    order
    > to run in a totem-pole arrangement (original value was 47uf) but I'm not
    > sure how I'll fit them in because they are currently on the board and
    > there's not room for 4, side by side or 2 stacked (it's a 2" high chassis
    > and the board is .75" up from the bottom. One idea is to cut holes in the
    > board and stack the caps using cable ties and RTV to hold them together.
    > There's no room under the chassi unless I want to mount the 4 caps on the
    > opposite underside of the chassis from the power tranny.
    >
    > Another option would be to play it close to the hilt and try to find 47uf
    > 500V caps or somehow try to fit an LCR 50uf/50uf 500V can inside the
    > chassis. Not sure I want to drill a huge hole in the chassis and even if I
    > do, I'd have to put it on the opposite side due to space considerations...
    >
    > The other possibly larger problem is the power transformer. It's made by
    > handwound transformers.com. I've heard many nightmares about them. It's a
    > 375-0-375 tranny and it's rated for 6A on the heater tap and 3A on the
    > rectifier tap. Even at practice volumes and a fan blowing on the tubes and
    > the transformer, it get so hot that the chassis is almost too hot to

    touch.
    > The fan keeps the tubes very cool so I know know it's the transformer
    > itself.
    >
    > I tried putting in a weber copper cap to see if not drawing down the
    > rectifier heater would make a difference. Since this transformer is a tad
    > too hot for my use, I think I may look into getting a decent quality
    > 350-0-350 transformer. Something like the Hammond 273X (120VA, sec.
    > 350-0-350, DC ma 110, Fil.#1(rct) 5.0v @ 2a, Fil.#2(htr) 6.3v @ 4.0a ct)
    >
    > If I wanted to ditch the rectifier tube and go with a full wave bridge
    > rectifier (w/no centertap), In that case since I wouldn't be using the
    > rectifier tube I'd probably go with a 330-330 of 340-340 transformer.

    anyone
    > have any recommendations? Yes, I know I should use google. I will
    >
    > P.S.
    >
    > I don't want to go off on a tangent but this one is the 2nd amp I got from
    > him. The first one had even more problems. I could have returned this amp
    > but I would have been charged shipping 4 ways (for 2 amps) including fedex
    > overnight to get the first one back so we worked out a deal where he sent

    me
    > a $200 rebate and I agreed to fix the amp myself...
    >
    > P.P.S.
    >
    > I hope this is enough information. I don't want to get accused of trolling
    > again... :)
    >
    >
    >
  11. Zorro_2K

    Zorro_2K Guest

    "Margaret Wilson" <twokatmew@nospam.msn.com> wrote in message
    news:bi03gd0oht@enews2.newsguy.com...
    > Wow, this is a really terrible story. I'm sorry you've had so much

    trouble,
    > Jack.
    >
    > Regards,
    >
    > Margaret


    I'm sure that Jack feels better now that you have told him you are
    sympathetic to his situation, Margaret. I, too, am sorry that Jack has had
    so many problems with his search for the perfect amplifier, and wish him
    better luck int he future.

    Do you fell better now, Jack ?


    >
    > "Jack A. Zucker" <jaz@jackzucker.com> wrote in message
    > news:%UK0b.13015$2Y6.4057255@news2.news.adelphia.net...
    > > I bought this thing from a small amp builder. I thought it was a good

    > deal.
    > > Let me just say that folks were right and that you get what you pay for.
    > >
    > > Anyway, it's basically a 50 watt Fender Reverb, single channel style

    amp.
    > > 375-0-375 PT, GZ34 rectifier, 2 6L6, (2) AX7 and (2) AT7 tubes, big BF
    > > Bassman size output transformer, no choke, yada-yada. Slight variations

    > upon
    > > the AB763 circuit, minus the vibrato.
    > >
    > > This thing has been a nightmare from the beginning. Speaker that didn't

    > fit,
    > > power tranny center-tap not connected, ground side of screen supply

    filter
    > > cap not connected, cold solder joints, non shielded wires going to the

    > dwell
    > > control (causing squealing), power tranny getting EXTREMELY hot, power
    > > supply and screen grid caps rated at 450V though they are seeing 475V,
    > > yada-yada.
    > >
    > > I've got everything fixed (including changing all audio components to

    > AB763
    > > values). The outstanding issues are the power transformer overheating

    and
    > > the underrated filter supply caps. I have a quad of 350V 100uf caps on

    > order
    > > to run in a totem-pole arrangement (original value was 47uf) but I'm not
    > > sure how I'll fit them in because they are currently on the board and
    > > there's not room for 4, side by side or 2 stacked (it's a 2" high

    chassis
    > > and the board is .75" up from the bottom. One idea is to cut holes in

    the
    > > board and stack the caps using cable ties and RTV to hold them together.
    > > There's no room under the chassi unless I want to mount the 4 caps on

    the
    > > opposite underside of the chassis from the power tranny.
    > >
    > > Another option would be to play it close to the hilt and try to find

    47uf
    > > 500V caps or somehow try to fit an LCR 50uf/50uf 500V can inside the
    > > chassis. Not sure I want to drill a huge hole in the chassis and even if

    I
    > > do, I'd have to put it on the opposite side due to space

    considerations...
    > >
    > > The other possibly larger problem is the power transformer. It's made by
    > > handwound transformers.com. I've heard many nightmares about them. It's

    a
    > > 375-0-375 tranny and it's rated for 6A on the heater tap and 3A on the
    > > rectifier tap. Even at practice volumes and a fan blowing on the tubes

    and
    > > the transformer, it get so hot that the chassis is almost too hot to

    > touch.
    > > The fan keeps the tubes very cool so I know know it's the transformer
    > > itself.
    > >
    > > I tried putting in a weber copper cap to see if not drawing down the
    > > rectifier heater would make a difference. Since this transformer is a

    tad
    > > too hot for my use, I think I may look into getting a decent quality
    > > 350-0-350 transformer. Something like the Hammond 273X (120VA, sec.
    > > 350-0-350, DC ma 110, Fil.#1(rct) 5.0v @ 2a, Fil.#2(htr) 6.3v @ 4.0a ct)
    > >
    > > If I wanted to ditch the rectifier tube and go with a full wave bridge
    > > rectifier (w/no centertap), In that case since I wouldn't be using the
    > > rectifier tube I'd probably go with a 330-330 of 340-340 transformer.

    > anyone
    > > have any recommendations? Yes, I know I should use google. I will
    > >
    > > P.S.
    > >
    > > I don't want to go off on a tangent but this one is the 2nd amp I got

    from
    > > him. The first one had even more problems. I could have returned this

    amp
    > > but I would have been charged shipping 4 ways (for 2 amps) including

    fedex
    > > overnight to get the first one back so we worked out a deal where he

    sent
    > me
    > > a $200 rebate and I agreed to fix the amp myself...
    > >
    > > P.P.S.
    > >
    > > I hope this is enough information. I don't want to get accused of

    trolling
    > > again... :)
    > >
    > >

    >
    >
  12. JC

    JC Guest

    Zorro, you are an ass.

    Jack is detailing some problems he had. He specifically asked a few
    questions that someone who frequents these boards would possibly be able to
    answer. I have learned from his post to be wary of small vendors and
    possible bad customer service. His post had a point. He has also
    contributed to this newsgroup and been helpful to other people in the past.

    Your post however was just obnoxious, and served no purpose except to show
    your intolerance, inconsideration and tendency towards sarcasm.

    If his posts bother you so much, kill file him, and you never have to be
    bothered again. Just like I am going to killfile you and not be bothered by
    your immaturity and self-centeredness. I have yet to see you contribute
    anything positive or helpful.

    Bye now,

    JC






    "Zorro_2K" <pcollenDELETETHIS@cfl.rr.com> wrote in message
    news:wL72b.80518$K4.3618841@twister.tampabay.rr.com...
    >
    > "Margaret Wilson" <twokatmew@nospam.msn.com> wrote in message
    > news:bi03gd0oht@enews2.newsguy.com...
    > > Wow, this is a really terrible story. I'm sorry you've had so much

    > trouble,
    > > Jack.
    > >
    > > Regards,
    > >
    > > Margaret

    >
    > I'm sure that Jack feels better now that you have told him you are
    > sympathetic to his situation, Margaret. I, too, am sorry that Jack has

    had
    > so many problems with his search for the perfect amplifier, and wish him
    > better luck int he future.
    >
    > Do you fell better now, Jack ?
    >
    >
    > >
    > > "Jack A. Zucker" <jaz@jackzucker.com> wrote in message
    > > news:%UK0b.13015$2Y6.4057255@news2.news.adelphia.net...
    > > > I bought this thing from a small amp builder. I thought it was a good

    > > deal.
    > > > Let me just say that folks were right and that you get what you pay

    for.
    > > >
    > > > Anyway, it's basically a 50 watt Fender Reverb, single channel style

    > amp.
    > > > 375-0-375 PT, GZ34 rectifier, 2 6L6, (2) AX7 and (2) AT7 tubes, big BF
    > > > Bassman size output transformer, no choke, yada-yada. Slight

    variations
    > > upon
    > > > the AB763 circuit, minus the vibrato.
    > > >
    > > > This thing has been a nightmare from the beginning. Speaker that

    didn't
    > > fit,
    > > > power tranny center-tap not connected, ground side of screen supply

    > filter
    > > > cap not connected, cold solder joints, non shielded wires going to the

    > > dwell
    > > > control (causing squealing), power tranny getting EXTREMELY hot, power
    > > > supply and screen grid caps rated at 450V though they are seeing 475V,
    > > > yada-yada.
    > > >
    > > > I've got everything fixed (including changing all audio components to

    > > AB763
    > > > values). The outstanding issues are the power transformer overheating

    > and
    > > > the underrated filter supply caps. I have a quad of 350V 100uf caps on

    > > order
    > > > to run in a totem-pole arrangement (original value was 47uf) but I'm

    not
    > > > sure how I'll fit them in because they are currently on the board and
    > > > there's not room for 4, side by side or 2 stacked (it's a 2" high

    > chassis
    > > > and the board is .75" up from the bottom. One idea is to cut holes in

    > the
    > > > board and stack the caps using cable ties and RTV to hold them

    together.
    > > > There's no room under the chassi unless I want to mount the 4 caps on

    > the
    > > > opposite underside of the chassis from the power tranny.
    > > >
    > > > Another option would be to play it close to the hilt and try to find

    > 47uf
    > > > 500V caps or somehow try to fit an LCR 50uf/50uf 500V can inside the
    > > > chassis. Not sure I want to drill a huge hole in the chassis and even

    if
    > I
    > > > do, I'd have to put it on the opposite side due to space

    > considerations...
    > > >
    > > > The other possibly larger problem is the power transformer. It's made

    by
    > > > handwound transformers.com. I've heard many nightmares about them.

    It's
    > a
    > > > 375-0-375 tranny and it's rated for 6A on the heater tap and 3A on the
    > > > rectifier tap. Even at practice volumes and a fan blowing on the tubes

    > and
    > > > the transformer, it get so hot that the chassis is almost too hot to

    > > touch.
    > > > The fan keeps the tubes very cool so I know know it's the transformer
    > > > itself.
    > > >
    > > > I tried putting in a weber copper cap to see if not drawing down the
    > > > rectifier heater would make a difference. Since this transformer is a

    > tad
    > > > too hot for my use, I think I may look into getting a decent quality
    > > > 350-0-350 transformer. Something like the Hammond 273X (120VA, sec.
    > > > 350-0-350, DC ma 110, Fil.#1(rct) 5.0v @ 2a, Fil.#2(htr) 6.3v @ 4.0a

    ct)
    > > >
    > > > If I wanted to ditch the rectifier tube and go with a full wave bridge
    > > > rectifier (w/no centertap), In that case since I wouldn't be using the
    > > > rectifier tube I'd probably go with a 330-330 of 340-340 transformer.

    > > anyone
    > > > have any recommendations? Yes, I know I should use google. I will
    > > >
    > > > P.S.
    > > >
    > > > I don't want to go off on a tangent but this one is the 2nd amp I got

    > from
    > > > him. The first one had even more problems. I could have returned this

    > amp
    > > > but I would have been charged shipping 4 ways (for 2 amps) including

    > fedex
    > > > overnight to get the first one back so we worked out a deal where he

    > sent
    > > me
    > > > a $200 rebate and I agreed to fix the amp myself...
    > > >
    > > > P.P.S.
    > > >
    > > > I hope this is enough information. I don't want to get accused of

    > trolling
    > > > again... :)
    > > >
    > > >

    > >
    > >

    >
    >
  13. Thanks JC.

    Say hi to rmmgrs for me Pat...

    Jaz

    "JC" <fullyaltered@hotmail.com> wrote in message
    news:9ld2b.30491$dO2.15579@fe2.columbus.rr.com...
    > Zorro, you are an ass.
    >
    > Jack is detailing some problems he had. He specifically asked a few
    > questions that someone who frequents these boards would possibly be able

    to
    > answer. I have learned from his post to be wary of small vendors and
    > possible bad customer service. His post had a point. He has also
    > contributed to this newsgroup and been helpful to other people in the

    past.
    >
    > Your post however was just obnoxious, and served no purpose except to show
    > your intolerance, inconsideration and tendency towards sarcasm.
    >
    > If his posts bother you so much, kill file him, and you never have to be
    > bothered again. Just like I am going to killfile you and not be bothered

    by
    > your immaturity and self-centeredness. I have yet to see you contribute
    > anything positive or helpful.
    >
    > Bye now,
    >
    > JC
    >
    >
    >
    >
    >
    >
    > "Zorro_2K" <pcollenDELETETHIS@cfl.rr.com> wrote in message
    > news:wL72b.80518$K4.3618841@twister.tampabay.rr.com...
    > >
    > > "Margaret Wilson" <twokatmew@nospam.msn.com> wrote in message
    > > news:bi03gd0oht@enews2.newsguy.com...
    > > > Wow, this is a really terrible story. I'm sorry you've had so much

    > > trouble,
    > > > Jack.
    > > >
    > > > Regards,
    > > >
    > > > Margaret

    > >
    > > I'm sure that Jack feels better now that you have told him you are
    > > sympathetic to his situation, Margaret. I, too, am sorry that Jack has

    > had
    > > so many problems with his search for the perfect amplifier, and wish him
    > > better luck int he future.
    > >
    > > Do you fell better now, Jack ?
    > >
    > >
    > > >
    > > > "Jack A. Zucker" <jaz@jackzucker.com> wrote in message
    > > > news:%UK0b.13015$2Y6.4057255@news2.news.adelphia.net...
    > > > > I bought this thing from a small amp builder. I thought it was a

    good
    > > > deal.
    > > > > Let me just say that folks were right and that you get what you pay

    > for.
    > > > >
    > > > > Anyway, it's basically a 50 watt Fender Reverb, single channel style

    > > amp.
    > > > > 375-0-375 PT, GZ34 rectifier, 2 6L6, (2) AX7 and (2) AT7 tubes, big

    BF
    > > > > Bassman size output transformer, no choke, yada-yada. Slight

    > variations
    > > > upon
    > > > > the AB763 circuit, minus the vibrato.
    > > > >
    > > > > This thing has been a nightmare from the beginning. Speaker that

    > didn't
    > > > fit,
    > > > > power tranny center-tap not connected, ground side of screen supply

    > > filter
    > > > > cap not connected, cold solder joints, non shielded wires going to

    the
    > > > dwell
    > > > > control (causing squealing), power tranny getting EXTREMELY hot,

    power
    > > > > supply and screen grid caps rated at 450V though they are seeing

    475V,
    > > > > yada-yada.
    > > > >
    > > > > I've got everything fixed (including changing all audio components

    to
    > > > AB763
    > > > > values). The outstanding issues are the power transformer

    overheating
    > > and
    > > > > the underrated filter supply caps. I have a quad of 350V 100uf caps

    on
    > > > order
    > > > > to run in a totem-pole arrangement (original value was 47uf) but I'm

    > not
    > > > > sure how I'll fit them in because they are currently on the board

    and
    > > > > there's not room for 4, side by side or 2 stacked (it's a 2" high

    > > chassis
    > > > > and the board is .75" up from the bottom. One idea is to cut holes

    in
    > > the
    > > > > board and stack the caps using cable ties and RTV to hold them

    > together.
    > > > > There's no room under the chassi unless I want to mount the 4 caps

    on
    > > the
    > > > > opposite underside of the chassis from the power tranny.
    > > > >
    > > > > Another option would be to play it close to the hilt and try to find

    > > 47uf
    > > > > 500V caps or somehow try to fit an LCR 50uf/50uf 500V can inside the
    > > > > chassis. Not sure I want to drill a huge hole in the chassis and

    even
    > if
    > > I
    > > > > do, I'd have to put it on the opposite side due to space

    > > considerations...
    > > > >
    > > > > The other possibly larger problem is the power transformer. It's

    made
    > by
    > > > > handwound transformers.com. I've heard many nightmares about them.

    > It's
    > > a
    > > > > 375-0-375 tranny and it's rated for 6A on the heater tap and 3A on

    the
    > > > > rectifier tap. Even at practice volumes and a fan blowing on the

    tubes
    > > and
    > > > > the transformer, it get so hot that the chassis is almost too hot to
    > > > touch.
    > > > > The fan keeps the tubes very cool so I know know it's the

    transformer
    > > > > itself.
    > > > >
    > > > > I tried putting in a weber copper cap to see if not drawing down

    the
    > > > > rectifier heater would make a difference. Since this transformer is

    a
    > > tad
    > > > > too hot for my use, I think I may look into getting a decent quality
    > > > > 350-0-350 transformer. Something like the Hammond 273X (120VA, sec.
    > > > > 350-0-350, DC ma 110, Fil.#1(rct) 5.0v @ 2a, Fil.#2(htr) 6.3v @ 4.0a

    > ct)
    > > > >
    > > > > If I wanted to ditch the rectifier tube and go with a full wave

    bridge
    > > > > rectifier (w/no centertap), In that case since I wouldn't be using

    the
    > > > > rectifier tube I'd probably go with a 330-330 of 340-340

    transformer.
    > > > anyone
    > > > > have any recommendations? Yes, I know I should use google. I will
    > > > >
    > > > > P.S.
    > > > >
    > > > > I don't want to go off on a tangent but this one is the 2nd amp I

    got
    > > from
    > > > > him. The first one had even more problems. I could have returned

    this
    > > amp
    > > > > but I would have been charged shipping 4 ways (for 2 amps) including

    > > fedex
    > > > > overnight to get the first one back so we worked out a deal where he

    > > sent
    > > > me
    > > > > a $200 rebate and I agreed to fix the amp myself...
    > > > >
    > > > > P.P.S.
    > > > >
    > > > > I hope this is enough information. I don't want to get accused of

    > > trolling
    > > > > again... :)
    > > > >
    > > > >
    > > >
    > > >

    > >
    > >

    >
    >
  14. Miles O'Neal

    Miles O'Neal Guest

    On Mon, 25 Aug 2003 01:09:25 +0000, JC wrote:

    > Zorro, you are an ass.


    One could make the same argument about you.
    [I won't, I'm just saying it would be about
    as valid. I'm assuming you would contend
    you aren't?]

    Jack has a reputation in AGA. If you do
    a google search, you'll see a pattern emerge.

    I covered this in another post, but it's basically
    run try the latest thing, [maybe have a brief honeymoon,
    and maybe not], start dissing whoever made the amp.
    He's found the perfect tone more times than Zsa
    Zsa found Mr. Right...


    It's usually a good idea to look a little more
    before you leap.

    8^)
  15. PCollen

    PCollen Guest

    "JC" <fullyaltered@hotmail.com> wrote in message news:<9ld2b.30491$dO2.15579@fe2.columbus.rr.com>...

    >
    > Jack is detailing some problems he had.


    So, what's NEW...LOL...
  16. JC

    JC Guest

    I don't need to do a google search. I am well aware of Jack and his
    "patterns." He likes to buy guitars, amps, and various accessories, enjoy
    them for a while, and then decide he would like to try something else. He
    generally lets everyone know what he liked about the item when he got it,
    and what he didn't like enough to get rid of it. So what. I do the same
    thing, although perhaps on a smaller scale. If he has the time and the
    money and the desire, more power to 'em. The way I see it, his opinion
    possibly saves me a little leg work. It seems that people have been
    attacking him unfairly, and it is rubbing me the wrong way.
    I really wouldn't say that I am an ass so much as I am defensive. I am
    not into flame wars so this is as far as I care to go in this direction in
    this discussion. Which may already be a bit too far but let me just say...
    I have read almost every post to this newsgroup for the past several
    years, although I post very rarely (and previously under a different name)
    and am pretty much obscure. Of course, you wouldn't have any way of knowing
    that unless you had looked very carefully before YOU leaped.

    JC


    "Miles O'Neal" <meo@rru.com> wrote in message
    news:pan.2003.08.25.05.23.20.464748@rru.com...
    > On Mon, 25 Aug 2003 01:09:25 +0000, JC wrote:
    >
    > > Zorro, you are an ass.

    >
    > One could make the same argument about you.
    > [I won't, I'm just saying it would be about
    > as valid. I'm assuming you would contend
    > you aren't?]
    >
    > Jack has a reputation in AGA. If you do
    > a google search, you'll see a pattern emerge.
    >
    > I covered this in another post, but it's basically
    > run try the latest thing, [maybe have a brief honeymoon,
    > and maybe not], start dissing whoever made the amp.
    > He's found the perfect tone more times than Zsa
    > Zsa found Mr. Right...
    >
    >
    > It's usually a good idea to look a little more
    > before you leap.
    >
    > 8^)
  17. "Miles O'Neal" <meo@rru.com> wrote in message
    > Jack has a reputation in AGA. If you do
    > a google search, you'll see a pattern emerge.


    The same can be said about you, Miles. You have deliberately
    obfuscated many postings in which I have asked for technical advise.
    As far as I'm concerned, you are knowledgeable but are a slimebag.
    Many folks have emailed me, thanking me for having the courage to
    continue to raise technical issues in the face of your obvious
    obsession with me.

    I have emailed you several times asking to take this offline but you
    refuse. Instead, you seem to enjoy the attention of disrupting
    postings that I'm involved in though you have REPEATEDLY promised to
    put me in your killfile and ignore me.

    Miles - You represent the worst in herd mentality.

    P.S.

    Where are you audio clips (ducking...) :)
  18. "Zorro_2K" <pcollenDELETETHIS@cfl.rr.com> wrote in message news:<BI72b.80517$K4.3618568@twister.tampabay.rr.com>...
    > I'm beginning to think that you post just to have something to read...


    I'm beginning to think you respond because you don't know how to read.
    Go back to rmmgers dude. At least your herd welcomes you there.
  19. Greg D

    Greg D Guest

    JC,

    I second that.
    Greg

    > I don't need to do a google search. I am well aware of Jack and
    > his
    > "patterns." He likes to buy guitars, amps, and various accessories,
    > enjoy them for a while, and then decide he would like to try something
    > else. He generally lets everyone know what he liked about the item
    > when he got it, and what he didn't like enough to get rid of it. So
    > what. I do the same thing, although perhaps on a smaller scale. If
    > he has the time and the money and the desire, more power to 'em. The
    > way I see it, his opinion possibly saves me a little leg work. It
    > seems that people have been attacking him unfairly, and it is rubbing
    > me the wrong way.
    > I really wouldn't say that I am an ass so much as I am defensive.
    > I am
    > not into flame wars so this is as far as I care to go in this
    > direction in this discussion. Which may already be a bit too far but
    > let me just say...
    > I have read almost every post to this newsgroup for the past
    > several
    > years, although I post very rarely (and previously under a different
    > name) and am pretty much obscure. Of course, you wouldn't have any
    > way of knowing that unless you had looked very carefully before YOU
    > leaped.
    >
    > JC
    >
    >
    > "Miles O'Neal" <meo@rru.com> wrote in message
    > news:pan.2003.08.25.05.23.20.464748@rru.com...
    >> On Mon, 25 Aug 2003 01:09:25 +0000, JC wrote:
    >>
    >> > Zorro, you are an ass.

    >>
    >> One could make the same argument about you.
    >> [I won't, I'm just saying it would be about
    >> as valid. I'm assuming you would contend
    >> you aren't?]
    >>
    >> Jack has a reputation in AGA. If you do
    >> a google search, you'll see a pattern emerge.
    >>
    >> I covered this in another post, but it's basically
    >> run try the latest thing, [maybe have a brief honeymoon,
    >> and maybe not], start dissing whoever made the amp.
    >> He's found the perfect tone more times than Zsa
    >> Zsa found Mr. Right...
    >>
    >>
    >> It's usually a good idea to look a little more
    >> before you leap.
    >>
    >> 8^)

    >
    >
  20. Atlas

    Atlas Guest

    x-no-archive: yes

    On Mon, 25 Aug 2003 12:41:06 GMT, "JC" <fullyaltered@hotmail.com>
    wrote:

    > I don't need to do a google search. I am well aware of Jack and his
    >"patterns." He likes to buy guitars, amps, and various accessories, enjoy
    >them for a while, and then decide he would like to try something else. He
    >generally lets everyone know what he liked about the item when he got it,
    >and what he didn't like enough to get rid of it. So what. I do the same
    >thing, although perhaps on a smaller scale. If he has the time and the
    >money and the desire, more power to 'em. The way I see it, his opinion
    >possibly saves me a little leg work. It seems that people have been
    >attacking him unfairly, and it is rubbing me the wrong way.


    Pardon me for jumping in here. There's nothing wrong with
    buying gear, enjoying it...and selling it when it no longer meets your
    needs. Nothing wrong with that at all.

    HOWEVER... With Zucker, it's not so much what he does, it's
    how he acts online that rubs me (and a whole bunch other people) the
    wrong way. One person described him as having a "terse sense of
    humor" I don't perceive that. I perceive him to be arrogant,
    caustic, smug, and without people skills. This isn't to take away
    from his musical accomplishments. He is a very fine player.

    If you trust Zucker's ears & judgement about gear - to the
    point to where he's going to "save you some leg work", I'd say "caveat
    emptor". Because he changes his mind about gear faster than most
    people change their underwear. One day it's the greatest thing since
    sliced bread - and the next day it's got numeous problems and
    "obvious" build design flaws...yada, yada, yada.

    Personally, I would NEVER buy a piece of gear because Zucker
    (or anybody else) said it was great. If I'm paying for the gear, I'll
    only trust my own ears. I've heard people rave about stuff online,
    followed up with a test drive of my own - and found that I had a very
    different experience.


    Regards,



    Atlas
    --
    http://www.geocities.com/cbpdoc/DiscHerniation_Main.html

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