[MRCA] AM-142/AIC Amplifier Query

[Mike Hanz]

You're correct, Jeep.  It was part of the AN/AIC-8 interphone set, and 
simply provided isolation of each interphone station from the amplifier 
(AM-300/AIC-8) where the combining takes place .  Earlier interphone 
systems simply used isolation resistors, but by the time this set was 
fielded, the number of interphone positions in the aircraft could get up 
to as many as twenty.  You had to have one of the AM-142s  for each 
position.

On 8/22/2015 7:59 AM, DSP3 wrote:
> I have a question.  I got a pair of these "mixer" amplifiers at a 
> hamfest.  Looking at the schematic and reading what little info is 
> available, might I assume that these are simply unity gain amplifiers 
> with the input and output Z as specified on the transformers?  If I 
> were to disconnect the feedback windings of the output transformer and 
> ground the low side of each input secondary, would this revert the 
> thing to a simple amplifier?  Or, am I missing something?  Also, 
> what's being mixed?  Looks like the mixing, per se, is done back at 
> the master unit.

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