[R-390] Capacitors to give thought to change

[rbethman]

I don't recommend a "complete" replacement of capacitors in the R-390As.

However, there are a handful that most likely should be.

C-103 - Part of the line filter.

C-603 and C-606.  Either suffer through opening and re-stuffing, or 
order some ready to plug in.  I don't give "endorsements", but will 
point out that Tom, of Hayseed Hamfest, is doing this at home.

C-553 - The mechanical filter blocking B+ capacitor

and last but not least - C-609, the tantalum on the Audio Deck Board.

That tantalum is bad news.

Regarding the component "turrets", (stand-offs), I have obtained these 
in the past, but have since found the original source I had, no longer 
has any.

I've replaced a number of these as they definitely have gotten very brittle.

Since the one that is still on the bench is indeed a St. J's blue 
striper, there has been plenty of corrosion issues.  That is precisely 
why I obtained an empty complete chassis.  I've replaced a bunch of 
ground connections in each module.  All wafer switches are/have been 
meticulously cleaned, along with tube sockets.

Every individual has their own methodology for what they do and how they 
go about it.

How anyone can say someone's is wrong, I have no idea.  Especially since 
they can only go by the written word, and are not sitting there with 
that person.

Bob - N0DGN