Re: LF: Re: Smaller DC feeding choke in class E amplifier

["Alan Melia" <alan.melia@btinternet.com>]

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: <jcraig@mun.ca>
To: <rsgb_lf_group@blacksheep.org>
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
>