[Milsurplus] Re Special Receiver 92

[phil]

I have operated two of these receivers . I found them very good radios. The 
model 92 is not designed to be operated in the same manner as a ham 
receiver.
The operation of the model 92 would typically be as follows:
    Company headquaters would know they were to receive a message containing 
information and commands at a specific time, say 1400hrs. The operating crew 
would have all day to set up the receiver. I am  shure the radio operaters 
were not permited to the just play with the receivers,  Japanese miltitary 
displine being what it was.
 Thus a quick tuning American receiver would be of no use.

 The receiver design was unusall, in that it had two sections, whick I will 
call section A and section B

Section A was a regenerative receiver covering 20kc to about 2mcs. Going by 
memory, it had two type 78 rf stages, a 77 detector and a 38 audio output. 
This was important and will be discussed below.

Section B was a super-hetrodyne covering about 1.5mcs to 20mcs. A 6A7 
converter was used with one or two 78s as RF stages.

Section A was used as the IF amplifier. Section A would be tuned to a 
different frequency for each high frequency band tuned by
Section B  Thus the IF frequency veryed according to what band Section B was 
tuning.
This was a similar design as used by the USN's  RAA and RAB receivers.

The model 92 was set up to operate with different power supplies. In one 
type power supply, the filaments were placed in series, hence the 38 audio 
output tube. With a second type of power supply, the filaments were switched 
to parallel operation.

A very versatile receiver. In operating it, I noticed very good senstivity. 
The selectivity was poor because, the regenative receiver used as the IF 
amplfier had single tuned circuits, not double tuned circuits as used in 
most super-heats.

The tuning condensers, were copys of General Radio varible caps.

Sorry just had to stand up for this receiver.
Phil
  O yes, one list member has two of these receivers(not me) , and might let 
one go for enough money. 


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