[Hallicrafters] Recapping Hallicrafters

[Leland Bahr]

Where have you been?  It is common knowledge not to replace an electrolytic
with one of much higher voltage rating then the original.
As stated, the cap does not stay formed and a non formed electrolytic can
and does easily short since the forming creates the caps insulating
properties between plates.  
No forming means very little if any insulation.  Thus shorting occurs.  IT
IS A VERY VERY BAD IDEA TO USE A CAP WITH A VOLTAGE RATING MUCH HIGHER THEN
THE ORIGINAL.
Lee
w0vt


> [Original Message]
> From: Clayton L. Nicolsen <cnicolsen at msn.com>
> To: <Hallicrafters at mailman.qth.net>
> Date: 7/12/2005 1:45:00 PM
> Subject: [Hallicrafters] Recapping Hallicrafters
>
> "One mistake some make is replacing electrolytic caps with one of a higher
> voltage, this will accelerate the aging of the cap. There usedto be a 
> working
> voltage rating on caps and on electrolytics, this was necessary not only
to
> prevent use at a higher voltage,but also prevent lower voltage use which 
> will
> not maintain the electrochemical reaction know as "forming" and the 
> capacatance
> will fade over time."
>
> I have never heard anyone say this before.  I have frequently heard that 
> replacing a capacitor with one of a higher voltage rating was just fine,
and 
> would cause no problems whatsoever.
>
> Are you certain about this?  Can anyone else chime in with verification 
> and/or a difference of opinion?
>
> Tia,
> Clay
>
>
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