|[AMRadio] ground sticks again|
k4kyv at hotmail.com
Mon Jun 5 00:25:25 EDT 2006
>Grounding capacitors can be unfriendly, but lifesaving in the longer term.
Not only unfriendly, but it can ruin the capacitors with excessive
instantaneous current surges. Better to first discharge through a
resistance to limit the discharging current, then apply the "coup de grace"
by shorting directly.
Large oil-filled transmitting capacitors are expensive and hard to find.
Like tubes, we need to take extra precautions to preserve them as long as
possible. I suspect that with the advent of solid state equipment and lower
operating voltages, that HV capacitors in a few years will be as hard to
find as most transmitting triodes are today.
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