Hi Joe , Thanks for the "plug" :-))
Yes the circulating currents get pretty large with the low impednces when
you try to put high power out with 12 supply. It doesnt do some caps a lot
of good either (think of the current density in the thin foil!). Most of
my
tests were done at 35v or higher and that is a lot easier.
Best Wishes de Alan G3NYK
----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Friday, March 07, 2008 11:47 PM
Subject: Re: LF: Re: Smaller DC feeding choke in class E amplifier
Alan, Johan and group,
Since experimenting on LF I have discovered the joys of Class E,
many thanks to Alan. My first 100W TX used an IRF-640 as
suggested on Alan's web page. A dozen of them could be had for about $10
in 2003. Unfortunately, they are have gone up quite a bit since then,
although much cheaper than a 6146! There seems to be a new generation
of hexfet such as the IRFP260 and perhaps it might be possible to use
this
in a 12volt 100w amp. Unfortunately, many 640's came to an untimely
demise in my unsuccessful attempts to get 100 watts with a 12 V supply.
73
Joe VO1NA
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