[R-390] IF Amplifier...new information...

[Les Locklear]

I went into my old paper files and found some more information regarding spare parts contracts and specific info on the audio module you have.

In 2002 Tom Marcotte N5OFF, Wally Chambers K5OP (SK) and I were involved with contract/order numbers on not just the R390 series, but spare parts, cabinets and other information regarding those particular R-390 series.

Attached you'll see more manufacturers and comments regarding the Comm. Systems audio modules sent to me from Tom Marcotte in 2002.

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
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