Joe,
The bleeder is a Ohmite L225J100K.
Thanks too all who have replied, keep the info comming
I love the info.
73's
****************************************************
--- "Joe Subich, K4IK" <k4ik@subich.com> wrote:
>
> Mike,
>
> Your bleeder resistor is too small.
>
> 4000 volt transformer with fullwave bridge should
> produce at least 5600 volts no load.
>
> 5600 volts across 100K -> 56 ma
>
> 56 ma * 56 ma * 100K = 313.6 watts
> 313.6 watts >> 225 watts
>
> At a minimum, you need either: (1) a pair of those
> resistors
> in series, (2) a 200 K 225 watt bleeder or (3) a
> 100K 500 watt
> bleeder. Even then, you will be not have a lot of
> safety
> factor and probably need to provide cooling for the
> bleeder.
> Safer yet would be a (series) string of four 50 K
> 225 watt
> bleeders.
>
> Finally, is the resistor rated for > 5 KV? Most are
> not.
>
> 73,
>
> ... Joe, K4IK
>
>
>
>
> > -----Original Message-----
> > From: amps-bounces@contesting.com
> > [mailto:amps-bounces@contesting.com] On Behalf Of
> aborg
> > Sent: Sunday, April 24, 2005 9:44 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@yahoo.com
> >
>
>
Mike-KK4MS
a_borg@yahoo.com
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