[sdiy] VCO tuning philosophy re-visited

[karl dalen]

Only by trained personal................?!

Well the, LM331 wont do it. Settle for something that
does 2,5Mhz edge detect by XOR to get 5Mhz and try
to make the relevant mid-to top range decently linear
well you already know that.

No, a HC4046 wont work, sorry, not even in PLL mode.

Reg
KD

--- Den mån 2011-02-07 skrev David G. Dixon <dixon at interchange.ubc.ca>:

> Från: David G. Dixon <dixon at interchange.ubc.ca>
> Ämne: Re: [sdiy] VCO tuning philosophy re-visited
> Till: "'Mike Pepper'" <profpep at hotmail.com>, synth-diy at dropmix.xs4all.nl
> Datum: måndag 7 februari 2011 23:44
> > There was a design published in
> the UK Journal "Wireless World", (at one
> > time the most repected electronics publication in the
> UK), which showed a
> > function generator based on this principle too. I've
> not been able to find
> > a
> > copy on-line, and I lost my originals in a house move
> 8 years ago.
> > 
> > The article was sometime in the 1970's, 1972 onwards.
> 
> 
> Interesting, Mike.  Thanks for that.
> 
> I've requested the relevant volume of Wireless World from
> the UBC Library.
> It's in long-term storage and can only be retrieved by a
> trained
> professional.  :)  When I get it, I'll make a
> PDF.
> 
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