[Jukebox-list] AMI JAH 200 and JBH 120

[Jens Hultgren]

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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