1952 Zenith Bugeye AM/FM Clock Radio

[vortalexfan]

Originally Posted by Electronic M

V1 is the only shared tube so it would be the most likely culprit for a weak tube, but may as well test all the tubes as if they are all barely good it could be a cumulative effect.

Make sure the internal antenna is working by substituting a good external FM ant.

If the tubes are fine check all resistors for tolerance, replace any out of tolerance. Also, check voltages at the tube sockets for any telltale discrepancies and work to correct any found.

If after all that FM is still weak try adjusting the alignment.

I figured out that the 19T8 tube was the problem in there as I had tried subbing out the all of the tubes including V1, and nothing really changed except that then the AM band would go out and the FM band would start working and the effect would would swap back and forth depending on the tubes changed out.

But when I swapped out the 19T8 tube it worked consistently on both bands, making me realize that the 19T8 was the culprit all along.
So now its working fine now. thanks for the help, everyone!