[Johnson] Adventurer P.S. Electrolytic caps needing replacement

[Roy Morgan]

At 12:39 AM 5/15/2002 -0400, Richard H. Arland wrote:
>Yup! Antique Electronics Supply has them. Actually they are 16 mfd at 
>about 500 VDC (if memory serves) and I recapped my Adventurer with them 
>and it works fine.
>Joe Yamond wrote:
>
>>Hello All,
>>I am wondering if anyone has had to replace the 8uf
>>700 v electrolytics


I am not familiar with the Adventurer, but:
The original ones were very likely two 350 volt electrolyitics in series, 
withOUT the recommended voltage equalizing caps.

I suggest you do this:

1) Check the surge voltage on the caps.. that is the highest voltage that 
occurs at turn-on and at no-load.
2) If you discover it is much more than the 500 volts rating of the caps 
from Antique electronics, do install two caps in series WITH equalizing 
resistors. Use resistors that will draw 3 to 5 ma.  Use two caps of 16 uF 
or more (20 uF would be fine.)

3) Do not use caps above their rating.
4) Do not put caps in series without voltage equalizing resistors.

Roy


Roy Morgan
K1LKY since 1959
7130 Panorama Drive, Derwood MD 20855
301-330-8828 home .... 301-975-3254 work
roy.morgan@nist.gov