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

[Glen Zook]

Remember that the tolerances on the old capacitors
were usually -50% / + 80%, which means that they could
actually be as low as 4 mfd or as high as 14.4 mfd. 
Newer capacitors are +/- 20%.  22 mfd 450 volt
capacitors are available from Mouser for as little as
62 cents apiece!  Putting 2 in series will give a
nominal capacitance of 11 mfd.  Allowing for +/- 20%,
this will mean that the actual capacity will be
between 8.8 mfd and 13.2 mfd, well within the range of
the original value of 4 mfd to 14.4 mfd.

The Mouser part number on the 62 cent capacitors is 

140-XRL450V22

They have other 22 mfd at 450 volt 20% tolerance
capacitors for varying costs up to $2.24 each.  I have
used numerous of their lower priced lines and have had
no problems at all.

Mouser is on-line at mouser.com and you can order
on-line using a credit card.  There is no minimum
order for USA orders.

Glen, K9STH


--- "Richard H. Arland" <rarland@earthlink.net> 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.
> 
> Cost is about $12/each. They ain't cheap!


=====
Glen, K9STH

Web sites

http://home.attbi.com/~k9sth/index.html
http://home.attbi.com/~zcomco/index.html

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