[Amps] [AMPS] How to start?

[R.Measures]

Augusto -- The safest screen supply for a 4cx250B is a shunt regulator 
that is fed through a large dropping resistor from the +2kV anode 
supply.  The shunt regulator can either be a string of 20v to 30v, 5w 
zeners mounted on a perf board or it can be a power FET shunt 
regulator.

On May 14, 2005, at 10:56 AM, rk wrote:

Augusto Yipmantin wrote:
> Hi all,
>
> My name is Augusto, OA4CVT, I am making a 432 mhz cavity using a 
> 4CX250B
> tube from EIMAC.

At 432 MHz, typical screen current is -2 to +2 mA.

> At moment I have an HV power supply with 1700 to 2000 VDC working well,
> it was made to drive a 3CX1500A tube for HF.
> What I need to make is a 375 VDC regulated power supply for the screen
> tube and 5V @4Ah for filament.

In an indirectly heated cathode type tube, this is called a heater.  In 
a directly heated type tube, this is called a filament.

> Some people told me about the IP-32 power
> supply for a Heathkit amplifier, but there is not information available
> for this device.
> May anyone help me to get a schematic for the power supply?
> 73 de Augusto, OA4CVT
> _______________________________________________
>> Amps mailing list
>> Amps at contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>>
>>
> I think the filament is 6.00 not 5 or 6.3..
>
>
> -- 
> Internal Virus Database is out-of-date.
> Checked by AVG Anti-Virus.
> Version: 7.0.300 / Virus Database: 266.11.6 - Release Date: 5/6/05
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>

Richard L. Measures, AG6K, 805.386.3734.  www.somis.org