Topband: K9ay loop not performing

Guy Olinger K2AV k2av.guy at
Tue Dec 10 13:44:58 EST 2019


See RF, search vacuum relay VC2T-13.2.  SPDT will allow you to
change your mind about what state you want with no voltage to winding. And
you will not need to buy a 24 volt power supply.

Rated 12 kV will handle anything ham QRO. These are new, currentLy
manufactured items.

73, and Happy Holidays,

Guy K2AV

On Tue, Dec 10, 2019 at 11:31 AM N4ZR <n4zr at> wrote:

> Now that I've determined that my transmitting antenna must be
> disconnected, in order for my K9AY loop to work successfully, can anyone
> tell me what sort of ratings are required for the relay required to do
> this remotely?  I'm assuming a vacuum relay, but in looking at the MGS4U
> list of available SPST relays, there is a huge price range.  What sort
> of numbers should I be looking for, given 1.5 KW and location at the
> base of a quarter-wave inverted L.
> I also note that most of the relays listed have  26.5 volt coils.  Can
> anyone recommend an inexpensive 24-26 volt supply that I can use?
> 73, Pete N4ZR
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