[Test-Equipment] Q and filters

[Carl]

All R-725's used new 1967 EAC R-390A units that were modified by Arvin and 
Servo Corp; I dont know how many contracts were issued nor production 
figurers; some rumors say 250. Used by a couple of agencies, including NASA 
for direction finding and the CIA and  the USN and possibly USAF for crypto. 
My limited experience was with the USN version in the 70's while I was 
assigned tender (A ship tied to a dock and supported by its decades of 
coffee grounds; it did have to be pushed out into the bay and back yearly so 
the crew could qualify for sea pay) ) overhaul duties during my yearly USNR 
assignment. A friend has a prototype.

Carl
KM1H


----- Original Message ----- 
From: "Bill Riches" <bill.riches at verizon.net>
To: "'Discussion of Electronic Test Equipment'" 
<test-equipment at mailman.qth.net>
Sent: Sunday, June 22, 2014 3:59 PM
Subject: Re: [Test-Equipment] Q and filters


> Hi Carl,
>
> I have an R-725, the Servo modified R390a with the R390 if module.  Yes - 
> it
> does sound better on SSB!  As I sell off my R390A units the 725 will stay!
> Mine is an EAC.  I don't know if other manufacturer's were morphed into
> 725s.
>
> 73,
>
> Bill,
>
> WA2DVU
>
>
>
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