[Collins] Rockwell Collins 30L-1 amplifier info needed

[Dr. Gerald N. Johnson]

On Wed, 2007-08-29 at 17:11 -0400, Barry Goldblatt wrote:
> Hello All,
> 
> Other than the obvious Rockwell Collins emblem on the front of the amp, is
> there any good way to be able to differentiate between it and say a late round
> emblem?

Or you mean a late winged emblem? Round emblems were Rockwell.
> 
> I have done some searching and haven't found any useful information on the
> topic.

I've not seen any. There might be discussion of revisions in a late
edition militaryish manual like the KWM-2 manual that is at CCA. It may
take that manual and looking at circuit revisions if any to pick up a
vintage. That or date codes on original electrolytics or tubes, maybe on
relays. There could be MCN (Manufacturing Change Number) tag or stamp to
indicate a vintage. If the 30L1 was blessed with random serial numbers
like the rest of the S-Line family they give little to go on unless the
first batch got used up and a new batch with a new range had to be
bought.
> 
> 73,
> Barry/W3AFH

-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer