[MRCA] Looking for TA-12C

[wf2u at starband.net]

Mike,

You're right it's the RA-10, I'm typing like a dyslexic sometimes
(especially when I'm multitasking and reading/answering my email while at
work...).

I should read my message before clicking on that send button...

I have a nice TA-12C and an MP-28, and the external test milliammeter, I
also got all the connectors so I'm ready to cable up the set, faking the
junction box.
All I'm missing is the elusive RA-10. Sometimes I see them on epay but
they're all hacked up almost beyond recognition. I don't know whether I'll
ever be able to find one in original condition... I may sink low and use
the TA-12 with the ARB receiver which is without its matching transmitter!

73, Meir WF2U
Landrum, SC


> Meir wrote:
>
>>It's a Bendix aircaft transmitter, used with the Bendix RA-1 receiver
>> on Canadian and some British Lancasters, post WW2 some civilian
>> aircraft used it as well.
>>
>>The power supply/modulator is the Bendix MP-28.
>
> Meir, I think that should be the later (but uglier) Bendix RA-10
> receiver.  I believe that the old TA-2J transmitter utilized the RA-1.
>
> What little info I've come across over the years seems (to me) to
> indicate that US military installations of this commercial Bendix set
> most often used the RA-10DB for beacon band and MF/HF receive coverage,
> in conjunction with a TA-10B HF transmitter.  The TA-12C provides LF/MF,
> and MF/HF coverage to 12 MHz in four *non-overlapping* bands.  In
> comparison, the TA-12B provides LF/MF and HF coverage to 7.7 MHz in four
> bands with wide overlap.  That allows the TA-12B to be tuned to more
> preset HF channels in the useful 4 to 7 MHz range than the TA-12C can
> accomodate.  Plus, RA-10DB coverage ends at 10 MHz, so TA-12C coverage
> of 10 and 12 MHz would have been pretty useless.
>
> The TA-12C seems to have been most often specified for RCAF and other
> Commonwealth installations.
>
> I've got a complete RA-10DB/TA-12B set with MT-53 LF/MF tank coil and
> the receiver and MN-20 loop control boxes, missing only the hard to find
> control box for the TA-12.  It's a pretty interesting set.
>
> The US military assigned JAN nomenclature for some commercial Bendix
> gear, like AN/ARN-11 for the MN-26LB RDF, and AN/ARC-9 for the
> interesting RTA-1B 10-channel HF set.  I wonder why they didn't do
> likewise for the RA-10/TA-12 gear.
>
> Mike / KK5F
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