[MRCA] Cleaning off a shelf - PP-621/URR

[mark weidmayer]

PP-621 is the power supply for the R-390 Receiver.

Mark


<quote who="Roger Klingman">
> Question, What does a PP-621/URR, made by Motorola for Collins, uses a
> pair of 26Z5Ws go with?
> At insistance of the xyl, these are yours for my cost plus shipping:
> 1. CM-14/URR, the Comparator used in AN/URA-6, -7 and -8.  It is missing
> the front filter (which looks like a speaker cover). On that cover would
> have been the RCA symbol and "115v 50-60~" in addition to the nameplate.
> This is definitely USN RTTY. Interior looks pristine.
> 2. RM-25-A Air Ministry, 1943
> 3. AM-103 B/U by Boehme, Inc. 1952 + manual; it is an a f amplifier used
> with teletype. Tube content- 1 6SJ7, 1 6H6, 2 6SN7GT, 2 6V6, 3 5Y3GT -
> untested.
> My costs:
> 1. $10
> 2. $5
> 3. $25
> 73,
> Roger
> k0rmk
>
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