[Amps] Bleeder Resistor Inquiry

[aborg]

What about using 10 2 Meg 2 Watt resistors in
parallel ?  The math indicates it should work.
****************************************************
--- Phil Clements <philc at texascellnet.com> wrote:
> Your bleeder is too small. All you need a bleeder
> for on a C input filter
> P.S. is to drain the HV after shut-down. Your
> 100,000 ohm resistor is
> flowing 160 ma of current, and just heating itself,
> your components, and
> your ham shack. I would use at least 200 k to 400k
> ohms. In all my 4 kv+
> power supplies here, I use 4 X 100k ohm @ 100 watt
> units in series. (225
> watt units will be better) Even these get really
> warm, but do the job just
> fine. I always double the wattage on the bleeder
> resistors as a safety
> factor. You don't want one of these babies to go
> open on you!
> 
> (((73)))
> Phil Clements, K5PC
> 
> 
> -----Original Message-----
> From: amps-bounces at contesting.com
> [mailto:amps-bounces at contesting.com] On
> Behalf Of aborg
> Sent: Sunday, April 24, 2005 7:44 AM
> To: Amps Amps
> Subject: [Amps] Bleeder Resistor Inquiry
> 
> I am currenty building a HV Power Supply using a
> 4800vac pole pig, 40uF 5kv oil filled cap , 10kv PIV
> rectifier board, 20 amp variac and a 100k 225watt
> bleeder.
> 
> The initial power up started well without the
> bleeder
> connected to the circuit after 30 min burn-in no
> problems. Discharged the circuit and added the 100k
> bleeder and 5 mins the bleeder starts to smell and
> the
> exterior paint starts to bubble. Shut it down and
> examined the circuit, all seem accurate. 
> 
> Question : Is my bleeder to small ?
> 
> P.S. : The variac was set at 4KV at all times.
> 
> Mike-KK4MS
> a_borg at yahoo.com
> 
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> 

Mike-KK4MS
a_borg at yahoo.com


		
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