[R-390] Test

[Drew P.]

Roy Morgan done wrote:

(snipped)

"The ?non-A? has its challenges, but some feel it is easier to overhaul.  For instance, many of the capacitors are going to be still just FINE after all these years.  Also there is the fabled Green Gear.  And the voltage regulator system.

My suggestion is that you put a fan on the outside of the frame to blow air past the 6082 series regulator tubes (you do have some spare 6082?s right?).  I have a picture of the one I cobbled up that shows how it is made and how it fastened to the existing bottom plate and frame screws.  It makes a HUGE improvement in the temperature of the regulator section.  Glad to send that picture to anyone interested."

Those 6082's do get VERY hot. one of our list members was working on a non-A resting on a newspaper-covered work surface, and reported that the 6082's set the newspaper on fire.

A worthwhile modification detailed on this list is construction of a simple soiled-state voltage regulator to replace the 6082's and associated circuitry. The 6082's, being relatively big power triodes, could then be auctioned off to the highest-bidding audiophool. The modification easily could be made plug and play to avoid disfiguring the radio.  Further, the soiled-state regulator could be located external to the radio and connected via an umbilical, thus moving heat outside the box.