[TowerTalk] Beverage Question
Wed, 11 Feb 1998 23:18:55 -0600
I am putting out a 1200' beverage at 12' high. I plan to have a relay
at the far end to switch the termination resistor in and out per the
ON4UN diagram in his book. I will feed the relay voltage down the wire
and the return path will be through the earth. I have a 12v relay which
has 400 ohms resistance in the coil. I have about 40 ohms resistance in
the wire and 2 rf chokes. I hope to put 24v on the wire to switch the
relay. I will have 2 copper clad 8' ground rods, one at each end for
the grounds. The end of the beverage wil be 1100-1200 feet from the
shack. My ground is extremely good. The beverage will be fed with 1/2"
TV hardline (about 300'). Now my questions:
1. Has anyone tried the ground for a return path for such a relay? How
did it work? What was the ground resistance?
2. Am I correct in assuming that a perfect system in my case would be
where there was 360 ohms of ground resistance plus the 40 ohms circuit
resistansc to match the 400 ohms relay coil resistance where I plan to
put 24v on the circuit to a 12v relay? Is this a reasonable amount for
ground resistance or will it be higher?
Thanks in advance for the usual high quality responses!
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