Can anyone tell me what might cause this wavy condition? Have it on two of my sets. All other sets are fine. I broadcast with a blonder tonge agile modulator on Channel 7 frequency and all my vintage sets are set to channel 7 and just pick up the signal with vintage rabbit ears. Seems odd that only two of my sets do this. Not sure if it is the signal or the sets. Pilot is an electrostatic deflection set and the other set that does this is a Crosley 630 clone. Have tried swapping tubes in both sets. Everything else seems great on both sets. Any ideas?
Thx!
http://youtu.be/zis459ig8BY