[Elecraft] Still no tx or rx on new K3

[Bob Henderson]

Bob

I had a similar experience for a few minutes during set-up of my new K3.  In
my case I had not installed a roofing filter at FL1, choosing instead to
leave a gap there for later installation of a wider filter.  The firmware
default assumes a filter will be present at FL1 and the absence of one made
the RX deaf and provided 0W RF out on TX.  Once I had changed the default
filter location, which I did using the Elecraft K3 utility, the RX came to
life and TX Gain Cal ran just fine producing the required 5W output on every
band.

This might possibly be your problem.

Good luck.

Bob, 5B4AGN