[Amps] Plate choke for HF pi-networks

[R.Measures]

On Oct 10, 2004, at 10:38 AM, Harold B. Mandel wrote:

> Dear Bill,
>
> The below referenced part was a consideration for the plate choke in 
> the
> dual 3CPX1500A7 project
> now underway.
> Unfortunately, since the anode power supply is now rated at 3807 volts 
> at
> 3 amperes, CCS,
> it was necessary to wind my own plate choke using Teflon-covered 18AWG
> solid
> on a 1.25-inch solid Teflon form, as the RFParts item wire diameter is
> undersized
> for the projected anode amperage. They specified "1.5 amperes" when
> looking into it.

**  For  = currents, the wire size needed for single-layer, solenoid 
wound, HV-RFC service is smaller than that needed in transformer 
service.  The reason is that, for RFC service, all of the wire is 
cooled by being in contact with air.   Thus, #24 gauge Cu will easily 
carry 3A-rms in RFC service.
>
> Sincerely,
>
> Hal Mandel
> W4HBM
>
>
>
>>> From discussions on this reflector and other places, I know that
>> design of an all-band plate choke for HF pi-networks is quite
>> difficult when the WARC bands are included.  I came across this one
>> for sale at RF Parts which claims to offer that capability:
>>
>> http://www.rfparts.com/choke.html#hightrans
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>

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