You are correct. In my case, I am using a ferrite loop on 160 and a short
vertical on high
bands to provide a second channel for polarization-diversity reception. The
main antennas
are a vertical on 160, and full size dipoles and a beam on the other bands,
which of
course I use for transmitting.
So the voltage produced by the receiving antennas is relatively low. I agree
that it
wouldn't work with a resonant antenna.
But couldn't you just put several diodes in series, like this:
--+-->|------>|---+--
|--|<------|<---|
if you want a higher clipping level?
On 7/12/2010 6:37 AM, Tom W8JI wrote:
>> I made an even more cost-effective one: I put a couple of diodes in
>> parallel (anode to
>> cathode) across the connector in the old coax switch I use for
>> receiving antennas. I wrote
>> "FOR RECEIVE ONLY!" on the switch in big letters.
>
> I can't do that here Vic because on most of my antennas the net power
> from the antennas results in a peak voltage much greater than 0.5 volts.
>
> .5 volts peak, which is the approximate conduction limit of a silicon
> rectifier like a 1N4007, is only 4 dBm!!!! That will turn your K3 into a
> Yaesu FT-101 for IM and even order performance.
>
> 73 Tom
--
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/
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