[ARC5] TA-12B/RA-10DB

[Mike Morrow]

John wrote:

> ...the RA-10 is a much under-appreciated radio.

I think the whole TA-12/RA-10/MP-28 system has never had much
regard given to it.  The TA-12B provided a lot of overlap in
coverage of its three HF channels, while the RA-10 with loop
adapter allowed both aural DF work and communications.  All that
was needed was:

MN-20E  RA-10DB Receiver DF Loop
MN-52B	 Control Box for MN-20E DF Loop
MP-28BA Modulator with Dynamotor and Mount
MR-9B   Control Box for RA-10DB Receiver
MT-31C  Tuning Meter for TA-12B Transmitter
MT-51C  Control Box for TA-12B Transmitter
MT-53B  MF Tank Coil for TA-12B Transmitter
RA-10DB	 Receiver with Dynamotor, Mount, and
MR-11D  Loop Relay Unit
TA-12B  Transmitter and Mount

Plus maybe a MS-14B generic junction box and some MS-18B mic jack
boxes.

Plus, an LM or SCR-211 frequency meter would be essential.  There
is no real calibration data provided for the TA-12 and RA-10.

This relatively small amount of equipment provides:

RA-10DB Receiver
Band 1      150 to   400 KC
Band 2      400 to  1100 KC
Band 3     2000 to  5000 KC
Band 3     5000 to 10000 KC

TA-12B	Transmitter
Channel 1:   300 to  600 KC
Channel 2:  3000 to 4800 KC
Channel 3:  4000 to 6400 KC
Channel 4:  4370 to 7000 KC

It seems like a pretty capable system that adequately covered all the
spectrum that really was valuable for aviation use, pre-WWII.

It's become fairly difficult to find all these pieces, and RA-10s have
never seemed to be all that common.

Mike / KK5F