On Fri, 21 Oct 2005 09:39:03 -0700, Tamaroak
wrote:

I have two new VHF radios, both of which have a PA and foghorn output
and will send a 20 watt signal into a horn mounted on my flybridge.
Standard Horizon says I can't just hook the two outputs together to the
horn because the one radio will backfeed into the other.

Their solution is to get two diodes and wire them on the + wire before
it gets to the horn. The other option would be to have two horns which
would be ugly.

Question: What kind, size, specifications do I use for said diode? The
guy at Radio Shack looked at me like I was from Mars when I asked him
about this.

Is there some other way to do this?

Capt. Jeff

Connect the grounds to both units. Then use a 1N2004 diode from each
unit to the common output. The diodes have a band on them. Put the
band outwards on each main unit. What you will get is conversion from
full wave to half wave. But this may be all that you need. The
diodes are about 25 cents each.

Let us know how it does or does not work.


Gary Gaugler, Ph.D.
Microtechnics, Inc.
Granite Bay, CA 95746
916.791.8191
gary@microtechnics dot com