"COLIN LAMB" wrote in message
...
Hello Richard:

Osterman's 3rd Edition has a little information.
Apparently it was made between 1945 and 1947 by the Allen
d. Cardwell Manufacturing Corporation, a family held
corporation. It shows that it is 18 tubes with a rurret
type display.

A Google Search came up empty. Usually, you will find
rare radios in personal collections. The fact that I find
none in personal websites is a bad sign.

Never have seen one.

I think you need one for your collection.

73, Colin K7FM
I know a little about the Cardwell company. Long ago
their main competition seems to have been Hammarlund and
National for capacitors. I don't think they made any other
receivers but don't know for certain. They can't have made
many of these guys. Shortly after the Model 54 was announced
Hammarlund began advertising the SP-600 and Collins the 51J
and 75A models. Hammarlund's first ads for the SP-600 shows
a drawing of a receiver which is recognizable but is very
different in detail for the receiver that made it to
production. The concept was a RX with calibrated band spread
and push-pull audio. It evidently got seriously redesigned
between the first ad (see the 1948 ARRL Radio Amateur's
Handbook) and the production model. I suspect the virtues of
the double-conversion competitors would have made it
difficult for the Cardwell RX. It sure would be interesting
to know some more history of both the Cardwell and SP-600
receivers.


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Richard Knoppow
Los Angeles, CA, USA