What mighty spikes? What is the rise time, duration and PRR?
Have you actually watched a 3000-5000VDC PS on a scope?
Carl
KM1H
----- Original Message -----
From: "Gary Schafer" <garyschafer@comcast.net>
To: "'Carl'" <km1h@jeremy.mv.com>; "'Jim Thomson'" <jim.thom@telus.net>;
<amps@contesting.com>
Sent: Saturday, October 30, 2010 9:51 PM
Subject: RE: [Amps] HV rectifier strings - to bypass or not?
> Why not? The output of the rectifiers provide some mighty spikes of their
> own. The capacitors handle it just fine.
>
> 73
> Gary K4FMX
>
>> -----Original Message-----
>> From: Carl [mailto:km1h@jeremy.mv.com]
>> Sent: Saturday, October 30, 2010 8:44 PM
>> To: garyschafer@comcast.net; 'Jim Thomson'; amps@contesting.com
>> Subject: Re: [Amps] HV rectifier strings - to bypass or not?
>>
>> You dont want intense line spikes going thru electrolytics.
>>
>> Carl
>> KM1H
>>
>>
>> ----- Original Message -----
>> From: "Gary Schafer" <garyschafer@comcast.net>
>> To: "'Jim Thomson'" <jim.thom@telus.net>; <amps@contesting.com>
>> Sent: Saturday, October 30, 2010 9:28 PM
>> Subject: Re: [Amps] HV rectifier strings - to bypass or not?
>>
>>
>> > Why place a capacitor across each diode string on a full wave bridge?
>> The
>> > filter capacitor is always across the transformer secondary.
>> >
>> > 73
>> > Gary K4FMX
>> >
>> >> -----Original Message-----
>> >> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
>> On
>> >> Behalf Of Jim Thomson
>> >> Sent: Saturday, October 30, 2010 7:58 PM
>> >> To: amps@contesting.com
>> >> Subject: [Amps] HV rectifier strings - to bypass or not?
>> >>
>> >>
>> >> ## KM1H came up with a better method... and that's to install one HV
>> >> disc ceramic
>> >> across each leg.....so 4 x caps in all. The purpose of these 4 x
>> caps
>> >> is to bypass any
>> >> junk/transients coming in off the street. Of course the V rating has
>> >> to
>> >> be
>> >> high if a single
>> >> cap is used. You can get disc ceramic caps in 4700 pf @ 10/15 kv
>> >> variety. [ Ceramite brand,
>> >> sold by mouser+ henry radio still has em]. IF .01 uf caps [10,000
>> pf]
>> >> installed across each diode,
>> >> and 8 x diodes used, you only have 10,000/8 = 1250 pf effectively
>> >> across each leg. If individual
>> >> caps used, .02uf @ 1 kv would be better. IMO... 4 x big caps, one
>> per
>> >> leg, is more effective, and
>> >> messier than 32 x caps.
>> >>
>> >
>> > _______________________________________________
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>> > Amps@contesting.com
>> > http://lists.contesting.com/mailman/listinfo/amps
>
>
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