'Practical Wireless' GDO design, circa 1967/9
 

I distinctly recall 'Practical Wireless' published a design for a grid dip oscillator during 1967 - 1969. IIRC, it used a twin-gang capacitor (probably a Colpitts osc.) and probably one triode valve. Sorry that I can't narrow down that date range and that I can't provide any more details: it was a long time ago. :-/

Can anyone identify the particular month - or even publish the particular design - for me, please?

Thanks,
Al. / May 12th. //

Re: 'Practical Wireless' GDO design, circa 1967/9
 

Was it this one from July 1966?

I'm sure there were others during the period 66 to 69 but this was the first one that came to mind.

Keith

Re: 'Practical Wireless' GDO design, circa 1967/9
 

Ah, yes - thank you Keith. That's the one: it was a very long time ago. A far back as 1966 eh? My goodness! :o
The reason for my enquiry is simply that I built this many years ago and I recall that it worked very well. Many years have passed since, and although I realise the usefulness of it, the one I built cannot be found. So . . . time to build another! ;D

Al.

Re: 'Practical Wireless' GDO design, circa 1967/9
 

Hi Al,
PM sent.
Rob.

Re: 'Practical Wireless' GDO design, circa 1967/9
 

How about this one? Based on a tuning indicator - possibly one can use one of the later types?
Tony

Re: 'Practical Wireless' GDO design, circa 1967/9
 

Thanks Rob.
PM received and responded to.

Al. / May 12th. //