[Amps] HV rectifier strings - to bypass or not?

[K1SG at aol.com]

Hi Carl,

Sounds like a good suggestion.  
I went looking for suitable HV capacitors in the Mouser, DigiKey, Surplus  
Sales and RF Parts catalogs, and found that Vishay/Sprague makes a nice .01  
uF 20 KV capacitor that sells for 68 cents...but no one stocks them, and  
the minimum order is 5000 pieces! I didn't see any of the .0047s at all.  Any 
suggestions on sources?
 
Steve  Gilbert
K1SG
K1SG at AOL.com
508-435-9133  

 
In a message dated 10/31/2010 3:37:43 A.M. Eastern Daylight Time,  
amps-request at contesting.com writes:

Message:  1
Date: Sat, 30 Oct 2010 20:50:37 -0400
From: "Carl"  <km1h at jeremy.mv.com>
Subject: Re: [Amps] HV rectifier strings - to  bypass or not?
To: <audioguy at charter.net>, "AMPS"  <amps at contesting.com>
Message-ID:  <016301cb7895$a4272480$6501a8c0 at DAVES>
Content-Type: text/plain;  format=flowed; charset="iso-8859-1";
reply-type=original

White noise is real but in an amp with RX/TX relay  isolation you wont hear 
it and it may not occur with big diodes.

It  is noticable with SS receiving and audio gear and a single .01 or so  
bypass across each leg of the rectifier takes care of it.

I like to  add a single .0047 across the full string in an amp and another 
at 
the  output to ground to keep any high intensity and transformer stretched  
spikes from bothering the diodes or electrolytics. The one to ground also  
catches any stray RF that the plate choke or its bypass  missed.

Carl
KM1H