Im telling you. At times, especially during storms, there will be
transients. Id also hate to see the transients from a sudden power failure
where the power kicks off and back on as a pole breaker trips and resets.
This is a rather normal occurance around here caused by wind or a drunk.
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 10:39 PM
Subject: RE: [Amps] HV rectifier strings - to bypass or not?
> Are you telling us that you see power line transients across the output of
> your 3000 volt power supply?
>
> 73
> Gary K4FMX
>
>> -----Original Message-----
>> From: Carl [mailto:km1h@jeremy.mv.com]
>> Sent: Saturday, October 30, 2010 9:15 PM
>> To: garyschafer@comcast.net; 'Jim Thomson'; amps@contesting.com
>> Subject: Re: [Amps] HV rectifier strings - to bypass or not?
>>
>> 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.
>> >> >>
>> >> >
>> >> > _______________________________________________
>> >> > Amps mailing list
>> >> > Amps@contesting.com
>> >> > http://lists.contesting.com/mailman/listinfo/amps
>> >
>> >
>
>
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