[R-390] Capacitor Replacements Vitamin Q

[Ben Loper]

I usually replace everything, takes a little longer but I don't have to worry about it

Sent from my iPhone

On Jan 24, 2011, at 11:47, Barry <n4buq at knology.net> wrote:

> 
>> My opinion....
>> 
>> The R-390/URR was what we know as "Military Grade".
>> 
>> The R-390A is more closely "Consumer grade" as far as their capacitor 
>> choices were concerned.  I have seen as many problems with the Brown 
>> Tubulars as the Black ones.  I have several cracked in a radio I'm working
>> on right now.  It's not an SJC survivor either..before someone throws that
>> flag...
>> 
>> Approach the suspect accordingly...
>> 
>> My usual approach is to do a sample test of caps in places that are not
>> critical.  If a high percentage come back leaky at rated voltage then a
>> wholesale replacement of "Paper" caps is in order.  I'm only speaking of
>> paper caps not micas or others that are known to be fairly reliable.
>> 
>> Cecil
>> K5DL
> 
> That "Military Grade" thing is good to know.  I was fortunate to find a very nice R390 with lots of extras on the local Craigslist this past weekend and it's now resting in my workshop.  It needs a bit of attention but not much.  Looking forward to seeing it occupy my CY-979A.
> 
> Barry - N4BUQ
> 
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html