[R-390] R-392 26A7 replacement

[Charles Steinmetz]

Gordon wrote:

> I used the MOSFET replacement designed by S. Johnson using a pair of IRF510s. It's on a small board mounted on an octal plug. No modifications to the radio at all - it just plugs in in place of the 26A7. It works like a charm.

This is BY FAR the best solution to fix the R-392's audio.  The circuit 
with my annotations is posted to Didier's site.  It is ultra-simple and 
can (should) be built into a tube base so it is 100% reversible.

Go to:  <http://www.ko4bb.com/getsimple/index.php?id=manuals>

Search for:  r392

Follow the link to download the file named:

"R392 26A7 MOSFET replacement Johnson annotated updated.pdf "

Best regards,

Charles