Eric Rosenberg wrote:
> Some points of clarification:
> -
>
> FWIW, I have an unused Dow-Key microwave SPDT relay. Big and beefy. Can
> this take the place of a vacuum relay?
>
>
>
Eric, most microwave relays won't take HV that exists between an open
wire in a normally resonant Marconi where reactances, current and
voltages are excessive depending on the power you run and the design
they are. Before you go out an buy vac relays you might see where a
manual opening or a grounding of the TX wire antenna makes any
difference on your RX antennas. I would think that as an alternative to
a vacuum replay that a bunch of automotive 20 amp relays in series may
give you the voltage rating for several hundred watts maybe more. I
would suggest however that the coils (and they would be all common
connected) would have a series of RFC chokes so each coil is isolated
from each other coil at RF. Never tried this....it sounds to easy but
could work. I have a huge 5 KW porcelain RF transfer switch and your
are welcome to it........but by the time it takes the contacts to flip
you would have missed your call and signal report!
Herb Schoenbohm, KV4FZ
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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