At 09:12 PM 1/16/01 -0800, Rick Karlquist wrote:
>I currently switch my 90 foot toploaded vertical between 40, 80, and 160
>meters using vacuum relays at the 30 and 60 foot point. They are latching
>types, so they just need to be pulsed. There are coils across them which
>resonate out the several pf of stray capacitance and also give DC continuity
>for static drain (and in the case of the 30 foot relay, the coil signal to
>the 60 foot relay). I run full power on 80m, but have had some problem with
>overheating of the 60 foot relay. Conclusion: it is workable but may be
>problematical. It was a fair amount of work to build the switch boxes. I
>am still trying to figure out how to keep condensation out of them; maybe I
>will pot the whole assy someday.
A good inexpensive source of these relays is www.mgs4u.com, on the
President's Page. Allen Bond is easy to deal with -- I'm just a satisfied
customer.
73, Pete N4ZR
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