[R-390] Unusual ? Front panel

[KR4HV]

It is curious that by now no one appears to have translated the Italian
description in English along with a schematic and parts list.
This lack of information in English begs the questions:
a. Did the conversion work as hoped and work well?
b. Was it worth the effort v.s. other schemes?
c. Does anyone know?

Regards,

Walt
KR4HV


-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Tom Bridgers
Sent: Thursday, June 13, 2013 9:08 PM
To: k2cby at optonline.net; R-390 Group
Subject: Re: [R-390] Unusual ? Front panel




These panels are the result of Columbia Electronics work in updating and
restoring R-390A's for certain 3-letter  US govt.
agencies and for a few Latin American countries.  I have several of the
Columbia Electronics nameplates that I purchased from Dick Walser who was
the prime sub- contractor doing the work..
 
He and his business partner designed the module that is an add on to the IF
deck which produces the capability to switch from Lower SSB and Upper SSB.
Somewhere in my files, I have a circuit drawn by Dick, but it is also
available in PaoloViappani's book, R-390-URR - R390a-URR handbook.The book,
written in Italian,  appears to be available from: Amazon.co.uk.
 
I also have one of the panels designed by Dick with the nomenclature you
describe.
 
Dick Walser, in North Hollywood, CA, was the subcontractor in that work.
His company was named Airborne Electronics.
 
I visited Dick about 15 years ago, and spent a delightful two days with he
and his lovely wife, Dede, talking about the old days and looking over his
incredible collection of R-390A parts.
 
Until his death about 5 years later,  I was one the phone with Dick several
times a month seeking his advice on this or that problem I was having trying
to restore a R-390A.  He had an encyclopedic knowledge of the R-390 and
R-390A, and was a genuine pleasure to have a conversation with.
 
Another person on this list had the great fortune of purchasing all of
Dick's parts, most of which unfortunately were lost in a shipping disaster
when they were shipped to his new home in Texas.
Best,
-Tom

 
> Date: Thu, 13 Jun 2013 18:46:37 -0400
> From: k2cby at optonline.net
> To: R-390 at Mailman.qth.net
> Subject: [R-390] Unusual ? Front panel
> 
> What R-390A version/contract had the words "UPPER"  "BFO"  "LOWER"
> stenciled where the BFO frequency normally appears and the words "AM"  
> "CW - SSB" stenciled where "BFO OFF-ON" normally appears on the front 
> panel? Was this an "after-market" conversion? Who were these units sold
to? Foreign?
> Spookdom? How many were produced? Does it indicate that the BFO was 
> crystal-controlled? Was there a product detector included? Has anybody 
> got a print?
> 
>  
> 
> Miles B. Anderson, K2CBY
> 16 Round Pond Lane
> Sag Harbor, NY 11963
> Tel.: (631) 725-4400
> 
> Fax.: (631) 725-2223
> e-mail: k2cby at optonline.net
> 
>  
> 
> 
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