Re: Protecting Drake Downconverters and other questions....

http://webpages.charter.net/n4wyk/847mod.htm is another one with a different
approach. what this does is when you flip a switch it cut over an antenna
relay from your 2m beam to your AO40 RX antenna. It also puts a voltage into
the radio to disable 2m TX thus no chance of blowing out you downconverter.

-- 
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Scott F. Migaldi, K9PO
MI-150972
PP-ASEL

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"Alan P. Biddle" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Dave,
>
> The best way I have found is to bring some lines out from the T-R
> switching.  That way, you can bring in the RX from the converter
> directly to the FT-847 RX.  A simple switch will allow you to route
> the normal RX signal to the rig.  Take a look at
> http://www.qsl.net/dl4mea/ft847mod/ft847mod.htm for one such mod.  You
> can access the points easily, and simply by unplugging a cable.  I
> have used this since AO-40 went up, and no problems with either
> satellite or normal operations.  There are some other methods of
> suppressing TX by removing a DC voltage, but I don't have a URL handy.
>
> Be warned, that the FT-847 WILL transmit when you power it up.  A few
> watts in FM mode, and some in SSB as well.  Even if you can remember
> to always get the switching right, if the AC power flickers, you will
> probably get fried.
>
> Alan
> WA4SCA
>