[MRCA] RS-1 GRC-109 Signal Suck Out Solution

[Tim]

Hi Breck - yep, that's the solution.  Thanks for the great
description/photo documentation.
You put the Heathkit assembly instruction writers to shame!  LOL

One thing that has puzzled me about these transmitters is the designers fed
HV B+ to the *antenna* end of the pi network coil rather than the tube
end.  This puts HVDC on the coil and PA band switch, plus the usual RF.  I
wonder why they did that....pretty unusual.
73, Tim
N6CC

On Mon, Nov 23, 2015 at 8:09 AM, B. Smith <smithab11 at comcast.net> wrote:

>        Several years ago I got tired of using a separate antenna for
> receive on my GRC-109. A SPDT relay was installed that is keyed via a
> isolation diode and is powered by the filament line.  The antenna relay
> solved the "suck out" problem and provides fairly decent QSK. A readily
> available SPDT Philmore relay is used.  I've  loaded some photos and
> instructions.
> Happy Thanksgiving to all.
> http://k4che.com/GRC109Rel/GRC109rel.htm
>
> Z
> ______________________________________________________________
> MRCA mailing list
> Home: http://mailman.qth.net/mailman/listinfo/mrca
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:MRCA at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/mrca/attachments/20151123/bf3b6167/attachment.html>