[Elecraft] KPA-500 no RF until power cycle

[NH7RO]

I think I found the culprit thanks to the mention of "no key cable connected
when using the KPA-K3 AUX cable."  (I already checked the TX:INH" item and
it was OFF)

I had my key cable connected to both the K3 and KPA despite also having the
AUX cable between the two.
I had left it connected ever since I was initially having trouble with the
amp right after I built it---that trouble was due to one of the ribbon
connectors only being connected to one row of pins which I soon fixed.
Thereafter, I forgot about having the key cable still in play.

This morning I unplugged the key cable and turned on the KPA, hit the mic
button and voila!  The amp powers up 1st time on every band as it should! 
Aha!

Hope this helps others who might be experiencing the same problem---it's not
sticky relays in the amp it's sticky relays in my noggin!

73,  Jeff,  NH7RO

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