[Amps] more on the HFS1000G RFPP amplifier

[John T. M. Lyles]

Certainly a consideration. If I build another one of those, I would 
want to get a custom choke made, like I did in 1983. And capacitor. I 
had a pair of polypropylene dielectric 0.97 uf 2500 VAC units, 
similar to microwave oven caps, in series, across the choke. The 
choke was tapped for 50 or 60 Hz action. Worked extremely well. 
However, the C input does seem to be quite workable, if you limit 
follow on energy in an arc as well as the surge current to the diodes 
from charging the caps.

Our HFS1000G doesn't need the stiffer power supply, now that i have 
closed loop control of the forward power with my ALC controller.

Sidelight:

At home, I am working on AM transmitter with choke input AND a big C. 
Using a pair of chokes, one in the neg CT lead of the tranny, and 
another in the plus ouput of the rectifiers. One is a 5-20 H 
Thordarson swinging choke and the other is 8 H fixed I believe. Cap 
is a single 40 uF NWL unit that I found, which was originally for 
pulsed apps. I called them and they suggested it will be good for DC 
filter at 120 Hz, no problem.

73
John
K5PRO

Rich suggests:
>How about resonant-choke filtering?
>


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