[TenTec] TenTec OMNI V FM'ing any ideas?

[Stuart Rohre]

How old is the power supply, maybe you have a loose connection on one of the
electrolytics which have screw terminals on many supplies today?   Also
check for solder loosened by heating on high current connections.

Look at fuse holders for discoloration indicating heating and oxidation.
Finally, parallel a known good capacitor and see if the mv change is
stabilized.
GL and 73,
Stuart K5KVH