[sdiy] frequency tripler

[Eric Brombaugh]

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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