Re: 3rd harmonic trap

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Jolyon Cox" <jolyon@xxxxxxxxxxxxxxxxxxxxxxxx>

if a 3rd harmonic band-reject filter or "trap" would not work, how about a
band-pass filter tuned to the fundamental of the TC? Would this not a
correct description of the of  circuit described in the following?
http://drsstc.com/~terrell/notes/DRSSTCprotec.pdf

Jolyon
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Tuesday, March 22, 2005 1:47 AM
Subject: Re: 3rd harmonic trap


> Original poster: Jimmy Hynes <jphynes@xxxxxxxxx>
>
> Sorry, but it won't work. Although it will block that frequency pretty
> well, the pole is just moved a little bit.
>
> It would be desireable to supress the higher modes to keep your driver
> on the fundamental mode. I tried it once to keep my SSTC from jumping
> to other modes during ground arcing (base current feedback is more
> susceptible to it), and realized why it wouldn't work after some more
> fets blew up :P
>
>
> On Mon, 21 Mar 2005 11:35:56 -0700, Tesla list <tesla@xxxxxxxxxx> wrote:
>  > Original poster: "Jolyon Cox" <jolyon@xxxxxxxxxxxxxxxxxxxxxxxx>
>  >
>  > Dear List
>  > I am wondering whether it would be possible to use a parallel-resonant
LC
>  > circuit in series with the primary of an SSTC as a "trap" to suppress
the
>  > unwanted 3rd harmonic mode of oscillation.
>  > Does anyone know if this is feasible or even desireable?
>  >
>  > Jolyon
>  >
>  >
>
>
>