To picture gallery
is the transceiver of radio set SCR-511. It was developed for the Cavalry, when the cavalry already became obsolete.
The original name was Guideon Radio, but it was widely known as
A horseman with a Pogo Stick looks like a horseman with a banner in his hand.
The engineers wanted to have a widespread use. There is a mounting für mobile use and an external Power supply with NF- Amplifier.
Pogo was developed almost simultaneously to BC-611 , but is technically more advanced.
BC-745 is a "Squad Radio", a small hand held unit for very local communications. The collection shows all American Squad radios from their beginning (1941) to 1986.
You may also read the article by Alan Tasker :
"U.S. Military Portable Radios"
Comparison BC-745 / BC-611:
SCR-511: Items in the museum:
BC-745: , Transceiver with 9 tubes.
BC-746 : Tuning unit with transmit and receive crystal.
The bottom of BC-745 is twisted off ,BC-746 is replaced by an other BC-746.
CH-39 : Chest unit ( *Ultra rare* !!) Contains dry battery BA-49, when on horse or in the field, and a second tuning unit BC-746.
PE-157 : vibrator supply/audio amplifier as an additional way to power the
BC-745, and as a way to have speaker type volume.:
Is operated by:
BB-54 : 2V- battery
Close relationship BC-611 and BC-745:
"BC-611" and "BC-745" (Pogo-Stick) have almost the same schematics. The resonant circuits even are made of the same components. The reason is that both radios were developed by the same producer: the company "GALVIN" .