Hello Ingo, at 11:33 12/29/96 +0200, you wrote:
>we would like to switch the Beverage antennas
>with a remote switch.
I have 4 remote RX antennas switched using only the feed line. Power supply
is required to furnish 4 states: +12 volts, -12 volts, 12 volts AC, and off.
Two DPDT relays are at feedpoint along with a single transmission line XFMR.
The two relays require individual filter capacitors and diodes (reversed for
each relay). For 160 RCV, I use 0.1 blocking capacitors and 1.0 mHy RF
chokes. PC board relays and sub-miniature components work fine--but use
higher voltage diodes. 1mHy chokes are 30 turns on FT50-72 cores. Good
luck with your project.
73, Charles
Charles W. Shaw, N5UL (ex-KB5UL)
Hobbs, NM
<n5ul@wtaccess.com>
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