[Jukebox-list] AMI JAH 200 and JBH 120

[Karl]

That's it Jens!!! Thanks. One has the AVC with a shorting plug installed and
the other does not. Now I need a schematic of the amp with AVC.

OK, I hate to admit this, but I recapped and tubed both amps but the one
with AVC does not work. I can see where the transformer has been hot in the
past and it blows the fuse now (only when the tubes are installed) and is
getting warm still with a 2 amp fuse installed but no tubes. I've obviously
still got a problem but trying to read the schematics sans AVC to
troubleshoot my problem in the amp WITH avc is confusing heck outta me.

Can anyone help? Thanks,

Karl
Columbus Coin-Op Shop
2061 S. Lumpkin Rd
Columbus, GA 31903
Shop (706) 507-2963
----- Original Message ----- 
From: "Jens Hultgren" <drjukebox at gmail.com>
To: "Jukebox mailing list" <jukebox-list at lists.netlojix.com>
Sent: Tuesday, June 27, 2006 11:02 AM
Subject: Re: [Jukebox-list] AMI JAH 200 and JBH 120


> To the best of my knowledge, the only major revision these amps underwent
> was the addition of an outlet for an auxiliary AVC.
>
> The schematics were glued to the inside of the amplifier bottom, and these
> schematics were marked what revision they were.
> This amplifier was first used in AMI F, and last in AMI J five years later
> (1959). For stereophonic J models two amps were used in tandem.
>
>    Jens
>
>
> On 7/27/06, Karl <karlh44 at knology.net> wrote:
> >
> > I wish I knew more about what I want to ask for help with.
> >
> > Here goes......I am repairing a JAH 200 and a JBH 120 both owned by the
> > same person. I don't remember which amp was in which. I removed both
> > thinking they were the same (they look identical on the outside and use
the
> > same tubes) but one is much more simple inside. The other uses a lot
more
> > electrolytic caps.
> >
> > Here's the question: Are these amps the same or is one supposed to be in
> > one machine and the other in the other or maybe is one a later model amp
or
> > is one a higher output ( I don't see how it could be though)?????
> >
> > I can't find anything about an optional amp in the manual anywhere and
it
> > doesn't make much sense to redesign an amp just because fewer selections
are
> > available to play. Anyway, with what limited info I have provided, can
> > anyone enlighten me?
> >
> > Thanks,
> >
> >
> >
> > Karl
> > Columbus Coin-Op Shop
> > 2061 S. Lumpkin Rd
> > Columbus, GA 31903
> > Shop (706) 507-2963
> > _______________________________________________
> > Jukebox-list mailing list
> > Jukebox-list at lists.netlojix.com
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> >
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