[Milsurplus] BC-938A, BC-616

[Michael Tauson]

On Fri, Apr 23, 2010 at 12:49 PM, Jack Antonio <scr287 at sbcglobal.net> wrote:
> The BC-616 relay unit does a couple of things. At the
> start of the 14 second period, the system is placed
> in transmit mode, with tone, on the channel selected
> on the control head, for about 1 second. It then switches
> to channel one, un-modulated for the rest of the period.

In the SCR-274-N, it also has to select Tx 1 which is the default
location of the VHF transmitter.

> What I'm not sure of is whether the transmitter mode is
> changed to CW, or is left in MCW with the tone muted for
> the quiet period. All my manuals are packed right now, and
> I won't be able to get to them till this summer.

This would be the same as the SCR-522.  As I recall, that wqas a plain
unmodulated carrier.

> I have seen no concrete information on USAAF usage of the system,
> but have seen references to British and Australian usage.

>From what I've seen it was only used in Europe for DF and/or IFF
purposes.  Of course, I've been known to be wrong before.  Although I
may be mistaken about that.  :-)

best regards,

Michael, WH7HG
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