[R-390] Rectifier Stack Replacement

[Kenneth G. Gordon]

On 18 Jun 2007 at 15:39, Barry wrote:

> Has anyone ever had one of these selenium rectifiers in the R-390 go
> bad? Yes? Not just hearsay but you had it actually happen to you? 
> 
> If so, report in.
> 
> Don
> 
> I bought an R390A chassis and the wires to the rectifier were cut. 
> The seller explained that he didn't know for sure, but the rectifier
> might have blown and that's why wires were cut.
> 
> He supplied a replacement rectifier (selenium) and I'll probably
> replace it with that.

I wouldn't use selenium under any circumstances. Even NOS or NIB 
have deteriorated to the point where in most cases they are essentially 
useless.

Besides IF they fail catastrophically (i.e. the magic smoke escapes) that 
stuff is highly toxic in certain quantities.

Personally, I wouldn't take the chance. 

Besides, they were crappy rectifiers anyway.

Ken Gordon W7EKB