From: jeff millar <firstname.lastname@example.org>
To: Steve Thompson <email@example.com>
Date: 21 May 2002 00:28
Subject: Re: [Amps] Non-linear subharmonics was: Nonsense, AL-1500 parasitic
>Ron made those comments, not jeff
Ooops, sorry. For Jeff, read Ron.
>----- Original Message -----
>From: "Steve Thompson" <firstname.lastname@example.org>
>Sent: Monday, May 20, 2002 11:03 AM
>Subject: Re: [Amps] Non-linear subharmonics was: Nonsense, AL-1500
>> On Tuesday 21 May 2002 02:43, Ron wrote:
>> > I read these pages and couldn't find a reference to the f/2 discussion.
>> > It seemed to discuss injecting energy into a resonant cavity using a
>> > pump running at twice the cavity frequengy and also injecting it at
>> > frequencies to obtain mixing products.
>> > Second, Steve's comment about "any thing (even noise) getting into the
>> > amplifier is an invalid argument in that any ligitmate signal that
>> > the amplifier is a mixing product and we already discussed that. If it
>> > were noise ....well noise is random and so the harmonics and mixing
>> > products would be noise and randon as well.
>> Don't be too hard on me Jeff - I was only passing on my best recollection
>> an article I read that offered an explanation for things I'd seen in
>> practice. Also, I think I wrote ...**maybe** even noise...
>> I'm not sure in my own mind that noise need be excluded as a trigger for
>> suggested self sustaining action that produces f/2, 3f/2 etc. signals.
>> 73, Steve
>> > ---
>> > Ron
>> > jeff millar wrote:
>> > > Here's two web pages that discusses using variable capacitance to
>> > > gain at f/2 as part of a larger discussion of varactor diodes and
>> > > parametric amplifiers.. These pages specifically discusses why f/2
>> > > works.
>> > >
>> > > http://www.tpub.com/neets/book11/45k.htm
>> > > http://www.tpub.com/neets/book11/45l.htm
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