[R-390] Out of the closet!

[Paul Galpin]

Hi there!

Some many years ago, I was given a 390A to repair - symptoms: dead.  With
help from this list, I got it going again, and, on the day of moving to my
present retirement address, I was offered it at a good price. Unfortunately,
finances were very doubtful at that stage so I had to pass on it.
Since the I have been lurking on the list, drooling with envy!

Lady Luck has been around, and today I took possession of 2x 390As, one
working, the other not, that's what the seller says.

OK, I know about the obvious things, like C553(?) to protect the filters,
but what can I learn from the ID plates?

"Working" has

Ser No 2114
Imperial Electronic Corp
37856-PC-63

PTO ser No 1551
Dubrow Electronic Industries
Type 798 BM101
this label appears to be stuck over a different previous one.


"Non-Working" has

Ser No 3123
Teledyne Corporation
35064-PC-62

PTO Ser No 7867
Type 798
P???R??STRO???Corp

What does this tell us?

The 390A I worked on long ago had the gears smothered in grease, put on by
the handful.  These two sets that I have just got have very clean gears,
with a trace of oil only. Which is correct? Which is typically original?


Paul Galpin
ZS2PG


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