[sdiy] frequency tripler

[geoff james]

Hi ALL , thanks for your replies. It does work , just not what i expected , now where's that difference amp.

Regards

Geoff

----------------------------------------
> Date: Sat, 7 Apr 2012 07:56:11 -0700
> From: ebrombaugh1@cox.net
> To: synth-diy@dropmix.xs4all.nl
> Subject: Re: [sdiy] frequency tripler
>
> Here's the link to the document:
>
> http://n4trb.com/AmateurRadio/SemiconductorHistory/40%20Uses%20for%20Germanium%20Diodes.pdf
>
> The circuit in question is on pg 14.
>
> I've done some simple simulations of this and it should work, even for
> normal Si diodes. There are some things to watch out for:
> 1) you need a difference amplifier to recover the tripled waveform from
> the two bridge taps
> 2) the tap on the voltage divider on the left side needs to be set so
> that the peak amplitude of the waveform on that side is less than the
> diode drop to maximize the tripled signal.
>
> The resulting waveform is basically the input wave with the peaks folded
> down. Nothing you couldn't do just as well (or better) with a
> single-stage wave folder we've all seen before.
>
> Eric
>
> On 04/06/2012 10:46 PM, James Patchell wrote:
> > I sort of wish you would have supplied a link to what you found.
> >
> > I was not able to find what you were talking about.
> >
> > However, I noticed that there was a lot of Amature Radio stuff on that
> > website.
> >
> > I suspect that you built a frequency tripler intended for use at high
> > frequencies. Also, these were generally intended only to triple a single
> > frequency.
> >
> > -Jim
> >
> > On 4/6/2012 9:42 PM, geoff james wrote:
> >> Hi All ,can someone please help with this one.
> >>
> >> At website n4trb.com , there is a cct described as a freq. tripler(40
> >> uses for germanium diodes section 3.5 , page 26)
> >>
> >> I built it , it didn't work.
> >>
> >> Can anyone explain how it would /should or couldn't work ? BTW it
> >> wasn't dated April fools day.
> >>
> >> Regards
> >>
> >> Geoff
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