[ipwizard]

I need some help with my 39-55. I cant get the MC receiver section to respond to any frequency from 355 - 400khz. Someone in the past had replaced the 6J7 with a metal 1620 tube. I looked the 1620 up and it appears to be a direct replacement for the 6J7.

I read through the instructions on setting up the MC section but can't get it to do anything. I'm using my frequency generator to sweep the freq. range.

Some times if I switch the band switch between BC and Remote ( or what ever it says) the 2A4 Thyratron light up but it never switches off.

I haven't checked the voltages yet.

Any ideas.