[Amps] .01uf caps across diodes ?

[Tim Duffy]

W8ZR Jim

Can you give advice on this topic?

73
Tim K3LR

-----Original Message-----
From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of jim.thom
jim.thom at telus.net
Sent: Tuesday, November 29, 2022 2:28 PM
To: amps at 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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