> This keeps on coming around. OE5JFL now has an English-language version
> of his thyristor crowbar on his own site, with readable schematics:
>
> http://www.qsl.net/oe5jfl/flashover.htm
>
> That solution is better than a glitch resistor, but it also requires a
> lot more effort.
I had a look at the OE5JFL crowbar. It looks like a good idea. But I
would still use the glitch resistor.
The cascaded thyristor network looks a bit dubious though. The ones
slowest to fire could fail, due to having to block excessive voltage.
I would put one thyristor across each electrolytic/bleeder. That way,
each cap gets discharged individually, and there is no risk of zapping
the thyristors.
Thanks for mentioning the URL.
Wilbert, ZL2BSJ
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