[R-390] IF Amplifier

[Les Locklear]

Glenn and group,

Your contract number is correct, I fat fingered and misstyped the one I sent.

FR-11-022-C-4-26418(E).

I attached another list of spare parts order/contracts with manufacturer's names high serial numbers (as reported) and type of module or spare parts.

Les


----- Original Message -----
From: Glenn Little WB4UIV <glennmaillist at bellsouth.net>
To: Les Locklear <leslocklear at hotmail.com>, <r-390 at mailman.qth.net>
Sent: 9/16/2019 8:29:13 AM
Subject: Re: [R-390] IF Amplifier
________________________________________________________________________________

Les and group

I have two pieces.
Both are contract number FR-11-022-C-4-26418(E).
Part number SM-C-343621.
No manufacturer name is on module.
These are serial 0294 and 0323.

I can provide pictures if desired.
One was bought many years ago and the other at the 2019 Shelby hamfest.

73
Glenn
WB4UIV


On 9/16/2019 8:41 AM, Les Locklear 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
>

-- 
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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
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
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