[R-390] R-390 Meltdown - Problem solved!

[Rick Popovich]

Good Morning to all,

 

Just checking back in with the group to say that the original suspect in
this case (C325) was indeed the only bad component. This caused R220 to go
up in smoke. I will be replacing all of the other caps with mica's as soon
as I get them ordered.

 

While I did report that I had observed a possible problem downstream
(possible issue with T207) - it turns out that it was A-Ok.

 

What I did find was a cold solder joint in one point of my original repairs
- after using a magnifying glass it was pretty obvious (getting old sucks)

 

After I touched up the connection everything worked just fine - no smoke to
be seen.

 

Sensitivity seems to be down slightly but this can be addressed easily. Now
I can continue to use this ugly duckling as my study tool.

 

Thanks again to all who offered their help, knowledge and suggestions - it
is sincerely appreciated

 

I know where to come for the next one!

 

Tnx & 73,

 

Rick