[R-390] Selenium rectifiers

[Sheldon Daitch]

I understand the idea of keeping BAs as BAs, but I wonder, what would 
the military
do with the selenium rectifier stacks, if the PP-629 was still in service?

My gut feeling is there would have been a modification kit sent out to 
the field to
change out the rectifier. 

73
Sheldon

Don Reaves wrote:

>
>I asked this question because I have one of the R-391 matching 28V power
>supplies, PP-629.  It has a beautiful selenium rectifier stack in it about
>the size of a loaf of bread.  I'm going to leave it alone and use it as is.
>It's job is to run the autotune circuits in the R-391.  
>
>My elmer used to call these things rectum finders.  I suppose there was some
>double meaning to that term based on their failure modes, but as a kid I
>knew not.
>
><grin>
>
>Don
>
>
>
>  
>