[R-390] 6HA5 Mods.

[Perry Sandeen]

All,

The problem isn't in using the 6AH5 tubes.

You have an AGC problem.  If you look at past postings and the Y2KR3 manual, you will find that the best solution is whole-sale replacement, no matter what ohmage reading you get.

Botton Line.  The AGC circuit is usually a PITA. Trying one or two caps here or there will leave you wanting to watch a Howdy Doodie re-re-run.

Regards,

Perrier