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BC-745
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
"Pogo Stick".
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:
Frequencies are changed by simply changing a module- the BC-745 is completely tuned then.
( Try this procedure with a BC-611 ...)
Antenna is much longer , i.e. much better for Short Wave.
Output power is 0.75 W , higher than BC-611's 0.38 W. = 1/2 s unit more than BC-611 (Thanks to Brooke, N6GCE, for this info).
But the BC-611 is more handy because it is only one component.
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
- Frequency range:
- 2 ... 6 MHz
Technical data:
- HF output:
- 750 mW
- Channels:
- 1, crystal controlled
- Powered by:
- In chest unit dry battery BA-49
- In power supply battery BB-54
- Voltages:
- Heating 1.5 V
- Receiving 67 V
- Transmitting 120 V
- Modulation:
- AM
- Tubes:
- 1 x 1S5
- 3 x 1T4
- 5 x 3S4
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SCR-563/BC-611
SCR-593/BC-728