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Re: [Amps] 234v - to convert or not?

To: "Jim Brown" <>, <>
Subject: Re: [Amps] 234v - to convert or not?
From: "k7fm" <>
Reply-to: k7fm <>
Date: Mon, 15 Sep 2008 06:36:53 -0700
List-post: <">>
If the bleeder/equalizing resistors are stable, the discharge time can be 
calculated.  So, you can determine the capacity of the electrolytic 
capacitors without even taking the amp apart.

If you are lazy or calculator impaired, you can simply time the discharge 
time (to a known low voltage), using the panel voltmeter, when the 
electrolytics are new and jot the information in your manual.  Then, once a 
year note the decay time.  Less capacitance means faster discharge time.

This does make the assumption that the resistors are stable - which is not 
necessarily a good assumption if you are using carbon comp resistors.

Since the electrolytics are in series, a decay in any one will reduce the 
time constant.

73,  Colin  K7FM 

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