[Milsurplus] [MRCA] field phones

[J. Forster]

I have the manual and can send it to you off-list if you want it.

The GRA-39 uses a sub-audio tone to control the T/R function. There are
also other units that use DC signalling, which has issues going through an
exchange. The WS 19 Wireless Remote Control Unit is an example.

-John

========



> Anyone have a website, or information on a "how it works" on field phones?
> I want to learn more about them.
>
> I was looking at the GRA-39's and wondering how easy would be to build
> something similar to that, just to be able to remote control a FT-897D
> with
> two wire field phones.
>
> The Clansman PRC-351 has the two wire post on the radio for field phone
> control, and you can even back to back two sets for auto re-broadcast. I
> got to thinking I wonder if I could build something simple just to connect
> to an 897D.
>
> I'm aware I could purchase a GRA-39, but I thought I would see if
> something
> simple could be made up to accomplish the same thing without all of the
> bells and whistles.
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