[R-390] Regulated B+ supply R-390A

[Charles Steinmetz]

Tom wrote:

>If one were to build a regulator for an A model what do you all feel the
>optimum B+ should be

 From one of my previous posts (not a recommendation, but some information):

>I once built a 390A for a friend with regulated B+.  The test mule 
>had a pot that could dial the B+ from 180v to 300v.  I could not 
>measure any difference in receiver performance regardless of where 
>the B+ was set.  So, I concluded that the actual value of B+ in a 
>390a is monumentally non-critical.

This does suggest that there is precious little, if anything, to be 
gained by regulating the B+ in a 390A.

What would you be trying to accomplish?

Best regards,

Charles