|
Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
|
Thread Tools |
12th May 2012, 12:37 am | #1 |
Rest in Peace
Join Date: Jun 2006
Location: Chard, South Somerset, UK.
Posts: 7,457
|
'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. // |
12th May 2012, 7:52 am | #2 |
Nonode
Join Date: Aug 2007
Location: South Bradford, West Yorkshire, UK.
Posts: 2,573
|
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 |
12th May 2012, 9:06 am | #3 |
Rest in Peace
Join Date: Jun 2006
Location: Chard, South Somerset, UK.
Posts: 7,457
|
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!
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! Al. |
12th May 2012, 4:11 pm | #4 |
Octode
Join Date: Apr 2009
Location: Aylesbury, Buckinghamshire, UK.
Posts: 1,522
|
Re: 'Practical Wireless' GDO design, circa 1967/9
Hi Al,
PM sent. Rob.
__________________
We have done so much, for so long, with so little, we are now qualified to do anything with nothing. |
12th May 2012, 7:19 pm | #5 |
Octode
Join Date: Jul 2011
Location: Leicester, Leics. UK.
Posts: 1,684
|
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 |
12th May 2012, 8:18 pm | #6 |
Rest in Peace
Join Date: Jun 2006
Location: Chard, South Somerset, UK.
Posts: 7,457
|
Re: 'Practical Wireless' GDO design, circa 1967/9
|