[600MRG] BC375 & BC348 on 630 Meters !

[Paul Signorelli]

Holy Molie....

KD0VBR (Tom) was running a BC-375, 100W, TX and a BC-348 RX on a dynamotor on 473 kHz. !!!

He had a little chirp.

Commonly used on B-17s, the SCR-287 (the combination of BC-375 and BC-348 receiver) set-up was found on thousands of those bombers. On the B-17, the transmitter was usually located under the radioman's table while the receiver was on top of the table.

The BC-375 uses a total of five vacuum tubes. Four tubes are VT-4-C triodes (type 211E) along with a single VT-25 (10Y) triode. The VT-25/10Y  is the speech amplifier in VOICE mode, the 1000hz oscillator in TONE (MCW) mode and the sidetone oscillator in CW mode. The second tube is the VT-4 that is used as the Master Oscillator. The third tube is the VT-4 used as the PA. The remaining two VT-4s are the P-P Modulator tubes. Operating voltage is provided by the aircraft battery/charger system (+28vdc) that is used for the low voltage requirements in the transmitter and also used to power the PE-73 dynamotor that provides the high voltage (+1000vdc) to the transmitter.

See:

<http://www.radioblvd.com/using_the_bc375e_today.htm>
Is anyone else running old surplus gear on 630 Meters?
Paul   w0rw