[Collins] 30L-1 Serial Numbers

[Dr.Gerald Johnson]

If the 30L-1 had randomized serial numbers like the rest of the S-line and 
KWM-2, the serial number gives no hints. I doubt there were 42,000 
made so that fits the randomized serial numbers. The round emblem 
came in during 1964, so its 1964 or later. Look for date codes on 
electrolytic capacitors, and MCN numbers for more detail. And if the 
electrolytics have been replaced, then without MCN (and a MCN list 
that I don't know exists anymore) the round emblem is the only hint of 
age. Tubes, if original, might have date codes too.

73, Jerry, K0CQ, Technical Advisor to the CRA

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