[Elecraft] Ok, K2 progresses but now no audio.

[Jess Gypin]

I am testing the 40 meter receive and peaking filters at stage II testing. I
got the problem with the PLL licked and everything was working as
advertised. Now I cannot get any audio out of the radio. No hum, no hiss,
nothing with an antenna connected. I do get side tone and spot tone, so that
tells that the audio amp is working.

Where should I start?

Jess EACH