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#1
March 20th 06, 06:31 PM
posted to rec.radio.amateur.homebrew
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Looking for 12V tube Rx project info
hay dont forget the r392 it was a 24 volt plates
On 23 Jun 2005 12:56:12 -0700, wrote: Setchell-Carlson managed to do it with loctal-base tubes running off of a 24/28 VDC aircraft bus back in WW2 times. No dynamotor, just that cute little box referred to as a "range receiver" or BC-1206. I bought a couple of them many years ago, surplus, principally to get the nice compact 3-gang variable capacitor. Fired one up in the company lab at 26 VDC and it was still in-spec although those specs weren't the best. At 24 VDC the spec rating was marginal. At 22 VDC it was below spec...but then the filaments were also running cooler at 11 V each. Don't remember what the IF (135 KHz) BW was, but, running with a crystal-controlled converter ahead of it, the 195 to 500 KHz tuning range could cover 75 or 40 meters no problem. A thought. |
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