I was under the impression they were there to keep any possible RF from
appearing across the electrolytics.
Don
VE6JY
On Sun, Dec 11, 2022 at 7:03 PM Tim Duffy <k3lr@k3lr.com> wrote:
> W8ZR Jim
>
> Can you give advice on this topic?
>
> 73
> Tim K3LR
>
> -----Original Message-----
> From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of jim.thom
> jim.thom@telus.net
> Sent: Tuesday, November 29, 2022 2:28 PM
> To: amps@contesting.com
> Subject: [Amps] .01uf caps across diodes ?
>
> What's the consensus on wiring .01uf disc caps across diodes in a HV supply
> ?
> W8JI sez they are required, and used in ameritron amps....and used to
> eliminate switching transients.
>
> Some say the caps are required to meet emc specs on commercial gear.
>
> I can't see how anything can get past the HV fitter caps.
>
> KM1H also uses caps across diodes. He also used another method, with a
> .01uf cap across an entire series string of diodes, like a .01uf @ 5 kv
> type.
>
> Orr's books recommend caps across diodes... to eliminate noise on TX on
> ssb. .
>
> Are they required...or not ?
>
> Jim VE7RF
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