[R-390] Out from the shadows ...

[Paul H. Anderson]

On Fri, 29 Jul 2005, Cecil Acuff wrote:

paraphrasing Cecil: ...the R-390 tends to not have the same problems with 
caps as the R-390A...

It is worth noting that the resistors and capacitors underneath the 6082's 
in the R-389, R-390, and R-391 audio decks also get fried from heat, so 
check your B+ and consider repairs there.  Out of 4 or 5 of these decks 
that I've worked on, only one looked clean, the others were pretty 
scorched.

The cost of failure can be lower, but since the main failure mode is for 
B+ to go high - 280-300V on some of mine, it means you can stress a lot of 
the rest of the components.

Again, this is only an issue for the R-389, R-390, and R-391.

Paul