[Heathkit] SB-610 Selenium Diodes - caps across silicon diodes.
Kim Herron
kherron at voyager.net
Mon Jul 4 18:05:41 EDT 2005
Hi Gang,
>But .... what's SAFE about putting a 1 or 2W resistor rated at 500V across
>a diode that sees 800-900 PIV? Or the roughly 8 Watts _peak_
>dissipation in those same resistors? The caps don't hurt anything, _AS
>LONG AS_ they are rated for at least 1000VDC.
>Mike,W8KRR wrote:
>>Still say "better safe than -"
>>Mike
Not to create an argument here, but I agree with Garey, and just
to add this: I haven't put resistors and caps
across diodes for at least 15 years, for just this reason. Things change,
and you are supposed to adapt when they do.
It goes along with discussion that occurs every 6 months to a year about
reforming old electrolytic caps and reusing
old paper caps. The current wisdom on the subject says (and that mil paper
sited here a while back agrees) PITCH
the junk, but it's still a discussion. BTW, in the Heath scopes under
discussion, there ain't no room for resistors and caps,
unless you want to create a voltage flash over condition to the
chassis. The diodes will work just fine without the extra components
and adding them will create more of a likely problem then leaving them out.
Thanks!!
Kim Herron W8ZV
1-616-677-3706
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