[AMRadio] Collins R-390?

[rbethman]

Bob,

It is a false impression.  The r-390 and the R-390A were VERY purpose 
built for radio intercepts AND diversity reception.

The R-390A was a "cost reduction" version of the R-390.

The entire R-39() series is built in modules, that are interchangeable 
without regard to chassis S/N.  You turn off, unscrew the "green screws" 
that mount THAT module, disconnect the cabling, and drop in a repaired 
module, reversing the process.

The "digital readout" is a mechanical device that is driven by the 
synchronized gear train.

Bob - N0DGN

Bob Macklin wrote:
> I had the impression the R-390 was essentially a R-388 with a digital
> readout.
>
> Bob
> K5MYJ
> ----- Original Message ----- 
> From: "Ed Sieb" <esieb at sympatico.ca>
> To: "Discussion of AM Radio in the Amateur Service"
> <amradio at mailman.qth.net>
> Sent: Friday, November 28, 2008 12:38 PM
> Subject: RE: [AMRadio] Collins R-390?
>
>
>   
>> No. The R-388 is the military version of a 51J-3. The R-388A is the
>>     
> military version of a
>   
>> 51J-4.
>> The R-390 series came much later.
>> --------------------------------------------------------------------------
>>     
> ---------------
>   
>> Bob Macklin  wrote:
>> s the Collin's R-390 (and R-388) basically a Mil version of 51 series
>>     
> receiver?
>   
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-- 
Bob - NØDGN