[GreenKeys] Re: Military TUs

[Rich MC Clung]

The reason the rack ears are missing is because the CV-116(*) is actually a sub-chassis.  There is a main chassis that mounts in the rack and has the slides built into it that the CV-116(*) sets in. 
   
  The CV-116(*) will tune in narrower shifts. You have to carefully watch the discriminator meter and tune the signal in. I used to use an AN/GRC-26D in a net of AN/GRC-122's and could copy almost all of their traffic when they were on 85Hz. When the CV-116(*) was all warmed up the AFC would track pretty well and keep the narrow shift in.
   
  The CV-116C on e-pay looks like it was sitting on a damp concrete floor for some time. You can see the corrosive etching on the rear of the top cover.
   
  RICH  WA6KNW
    Gentlemen,

In general, of the military demodulators, which is deemed the best?
Do any of them hold a candle to a HAL or a Dovetron?
And specifically, is the CV-116C/URR a "good" one?
(see eBay item #250090826922)

Dave, WW8S

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Ah, our friend RadioMart again!

It appears that the ears or rails that allow for rack mounting are missing.

These things are two-channel terminal units from an era duriing or before 
the R-390A.. (The CV-115 is one channel.) This thing may well weigh close 
to a hundred pounds.

They operate on the IF output from two receivers, and are slope-detecting 
systems. That is, they have a discriminator circuit that puts out a voltage 
that varies with frequency. Here is a message from my notes file on them: