[R-390] IF Amplifier

[Tom Bridgers]

Well, Nick’s photos show the enormous, Herculean effort It would take to build out the IF deck on this virtually empty chassis. Seriously  unobtainium parts are missing. 
Good luck,
-Tom KE4RHH 




Sent from my iPhone

> On Sep 16, 2019, at 9:06 AM, Nick England <navy.radio at gmail.com> wrote:
> 
> FWIW - Photos of Glenn’s unfinished IF deck at
> http://www.virhistory.com/ham/shelby-19/IMG_3490.JPG
> http://www.virhistory.com/ham/shelby-19/IMG_3491.JPG
> Cheers,
> Nick
> 
> On Mon, Sep 16, 2019 at 8:41 AM Les Locklear <leslocklear at hotmail.com>
> wrote:
> 
>> Glenn and group,
>> 
>> That was a spare parts contract awarded to Communications Systems Corp. in
>> 1966  for audio modules. They also manufactured Veedor Root Counters
>> order/contract no. SM-C-249195. And, audio cw filters. They were located in
>> Morton Grove, Illinois.
>> 
>> Glenn, look closer at the contract number. I have it listed as
>> FR-11-022-C-C-26418(B) That example was in a 1967 EAC s/n 4743.
>> 
>> There are several other manufacturers that manufactured spare parts
>> modules under separate order/contract numbers. Stewart Warner, Clavier
>> Corp., and American Transformer Coil located in Richmond Hill, Long Island,
>> NY.
>> 
>> Les Locklear
>> 
>> ----- Original Message -----
>> From: Glenn Little WB4UIV <glennmaillist at bellsouth.net>
>> To: <r-390 at mailman.qth.net>
>> Sent: 9/15/2019 7:46:47 PM
>> Subject: [R-390] IF Amplifier
>> 
>> ________________________________________________________________________________
>> 
>> I have an IF Amplifier that was never completed.
>> It is part number SM-C-343621.
>> I have heard that there are two versions of the IF amplifier and suspect
>> that this is the first and was pulled from the assembly line when the
>> second or later version was approved.
>> There is another number that I do not recognize on the IF Amp.
>> FR-11-C22-C-4-26418(E), possibly a contract number.
>> If there were two versions if the IF Amplifier, what were the changes?
>> I would like to build this amp as if it were a kit to ensure all
>> resistors are in tolerance and the capacitors do not leak.
>> 
>> Any ideas?
>> 
>> 73
>> Glenn
>> WB4UIV
>> 
>> --
>> -----------------------------------------------------------------------
>> Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
>> Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
>> QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM   NRA LM   SBE ARRL TAPR
>> 
> -- 
> Nick England K4NYW
> www.navy-radio.com
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