[Amps] caps across rectifier diodes

[Alex Eban]

...capacitors are still needed. They were put there to reduce rectifier
hash- noise generated in the diodes by the reverse leakage current- ant that
is still there, even though reduced in modern diodes. That may impede
reception, especially with QSK.
Resistors are less needed to equalize the voltage distribution across the
diodes in one string, but they will definitely do no harm if installed
Soooo, the bottom line is: they can do no wrong! Install them if you wish.
Apart from money and space there's no harm in them!
Alex	4Z5KS

-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Paul Kraemer
Sent: Monday, March 02, 2009 8:02 PM
To: Doug Renwick; garyschafer at comcast.net; 'Steve Flood';
amps at contesting.com; rfamplifiers at yahoogroups.com
Subject: Re: [Amps] caps across rectifier diodes

My question too, what does it hurt to put the resistors and capacitors 
across modern diodes?
Don't tell me it isn't needed. Tell me what is it going to hurt if I want 
the belt and suspenders.
I've always put the resistors and capacitors across my diode string designs 
and have never had a problem doing that, so please enlighten me, what is it 
going to harm.
Paul K0UYA
----- Original Message ----- 
From: "Doug Renwick" <ve5ra at sasktel.net>
To: <garyschafer at comcast.net>; "'Steve Flood'" <kk7uv at bresnan.net>; 
<amps at contesting.com>; <rfamplifiers at yahoogroups.com>
Sent: Monday, March 02, 2009 11:51 AM
Subject: Re: [Amps] caps across rectifier diodes


> My Ameritron amp diode board with 1N5408 diodes has .01M 1KV caps across
> them.
>
> Doug
>
> The train doesn't stop here anymore.
>
> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com]
> On Behalf Of Gary Schafer
> Sent: March 1, 2009 2:25 PM
> To: 'Steve Flood'; amps at contesting.com; rfamplifiers at yahoogroups.com
> Subject: Re: [Amps] caps across rectifier diodes
>
> No, modern diodes don't need or want resistors or capacitors across
> them.
>
> 73
> Gary  K4FMX
>
>> -----Original Message-----
>> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com]
> On
>> Behalf Of Steve Flood
>> Sent: Sunday, March 01, 2009 11:53 AM
>> To: amps at contesting.com; rfamplifiers at yahoogroups.com
>> Subject: [Amps] caps across rectifier diodes
>>
>> I am using a string of 4 6A10 diodes in each leg of my HV power
> supply.
>> Should these each have a .01uF 1kv cap across them?  I see some
> designs
>> that do this and some do not.
>>
>> Tnx,
>> Steve KK7UV
>
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps 

_______________________________________________
Amps mailing list
Amps at contesting.com
http://lists.contesting.com/mailman/listinfo/amps
No virus found in this incoming message.
Checked by AVG - www.avg.com 
Version: 8.0.237 / Virus Database: 270.11.5/1979 - Release Date: 03/01/09
17:46:00