[Jukebox-list] AMI JAH 200 and JBH 120

[Karl]

I only have one bottom plate and it has the same schematic as the one in the
manual. At first glance it looks to be the simpler of the two amps but I
will have to examine it a bit closer to be sure. The more complex amp has
about 10 or 15 electrolytic caps whereas the simple one only has 2. There
are more differences in the wiring but that's the easiest to explain.

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
> > _______________________________________________
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> > Jukebox-list at lists.netlojix.com
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> >
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