[R-390] paper capacitors

[Cecil]

What's strange to me is that if we were having this discussion on a Hammarlund, Hallicrafters or National list it's pretty much an accepted fact that one of the first things one would do in a restoration would be to replace the paper coupling/bypass caps...black beauties, brown beauties, tiny chiefs you name it.  But we continue to debate the issue as it relates to the "A" series of the R-390 receiver when in truth the paper caps used in its build are of only marginal if any improvement over those used in consumer grade communications receivers of the same period.

It's even accepted that all the Hunts brand coupling/bypass caps in the military Racal RA-17 series have to go due to electrical leakage issues....(ask me how I know)

What makes the R-390A special (read exempt)?

Cecil

Sent from my iPad

> On Nov 30, 2014, at 9:41 AM, Bob Camp <kb8tq at n1k.org> wrote:
> 
> Hi
> 
> This is why I cringe a bit when people decide to wholesale re-cap some of these radios. The parts in there have made it past infant mortality and various instal / damage issues. You are trading one set of things for another. 
>