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![]() "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. -- --- Richard Knoppow Los Angeles, CA, USA |
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