Topband: K9ay loop not performing

[N4ZR]

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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