[R-390] Final IF

[chuck.rippel at cox.net]

The IF module is electrically, the last IF unit in the signal path.  You 
have 2 variable, tracking IF's which are located on the RF deck that are 
"in front of" the "final" IF unit.

--
Chuck Rippel

"Many of the truths to which we cling depend on our point of view."
- Yoda




> Date: Sat, 28 Dec 2013 20:19:07 -0500
> From: <w4thq at cox.net>
> To: r-390 at mailman.qth.net
> Subject: [R-390] Collins s/n marking
> Message-ID: <20131228201907.XCTUX.528147.imail at eastrmwml206>
> Content-Type: text/plain; charset=utf-8
>
> A Collins AF unit has the following stamping:
>
> FINAL AUDIO UNIT
>      540  7553  005
> COL  SER.  NO.  323
>
> A Collins IF unit has the following stamping:
>
> FINAL I. F. UMIT
>    540 7577  006
> COL SER. NO.  221
>
> I am curious about the word "Final"
>
> John W4THQ
>