[Boatanchors] Reforming Electrolytic Capacitors

[Ron]

In principle, increase to the next step when the current into the cap is less 
then the rated leakage current. When the latter is not known, select a 'safe' 
value. Say, 1mA.
-- Ron

      From: D C _Mac_ Macdonald <k2gkk at hotmail.com>
 To: "boatanchors at mailman.qth.net" <boatanchors at mailman.qth.net>; Drake Mailing List <drake at mailman.qth.net> 
 Sent: Monday, February 20, 2017 4:37 PM
 Subject: [Boatanchors] Reforming Electrolytic Capacitors
   
The Drake L-75 Linear Amplifier I am trying to safely bring back to life left Drake's build line on May 14, 1981.

It has NEVER had high voltage applied to the filter network.  The plate transformer was still in its sealed shipping carton so had never been installed.


Who has any recommendations for "reforming" the filter caps?  I have it set up on a Powerstat (like Variac)

and can bring the plate supply up gradually.  At first, I am applying 10 to 120 VAC to the 240 VAC input to the power transformer.  I can rewire as appropriate to bring it to 240-250 VAC input.


Using 10 Volt steps, what do you recommend for duration at each 10 Volt interval?


73 de Mac, K2GKK/5

Oklahoma City, OK



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