>> From: bkmak@airmail.net (Bob Kmak)
>> Subject: Re: [AMPS] Re: Bent filaments
To: <amps@contesting.com>
>> Date: Mon, 14 Jul 97 16:38:03 +0000
>
>Hi Bob,
>
>> Tom,
>> Are you saying that a string of smaller HV supply capacitors in series
>> is better than a big oil-filled cap, for big-bang protection purposes?
>
>Absolutely. The best electrolytics are ones that are just as large as
>necessary. Overkill in the power supply transformer and rectifiers is
>a good idea, but one the capacitor is large enough to get you way out
>on the knee of the voltage curve, adding more C actually can create
>headaches.
Agreed. More is not always better. However, a suitable HV glitch
resistor is a good idea no matter what type of filter caps are being
used.
>Oil filled caps have very low equivalent internal series resistance
>(or ESR), and so if the amplifier has a momentary fault the source
>current can be hundreds of amperes.
...or even kiloamperes with special pulse-rated capacitors. However, not
all oil-filled capacitors have low ESR.
Rich---
R. L. Measures, 805-386-3734, AG6K
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