UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

MotorBikeLes · 29th Aug 2019, 5:12 pm

As mentioned above, I have both the vertical and the horizontal calibration units. I also have a couple of the dummy plugins used on D63/DM63 if only one vertical plugin was supplied. (these were supplied "bare" I believe, with vertical plugins specified separately)
Anyway, I will attempt to sketch out the circuits of all three versions. The dummy units could easily be adapted for the H cal unit, maybe with some difficulty for the V cal unit.
Some time ago it occurred to me that it should be possible to design a circuit enabling them to be converted into a component tester. When I have done my bit, maybe one of the brighter members will design such circuit. I did think it would need a small powered transformer, but since there are +24v, -24v and of course 0v supply lines, there may well be a way without an onboard transformer.
When it is eventually complete, I will post it as a separate thread.
Les.

29th Aug 2019, 5:12 pm	#67
MotorBikeLes Nonode Join Date: Dec 2012 Location: Kirk Michael, Isle of Man Posts: 2,350	Re: Telequipment D75 scope. As mentioned above, I have both the vertical and the horizontal calibration units. I also have a couple of the dummy plugins used on D63/DM63 if only one vertical plugin was supplied. (these were supplied "bare" I believe, with vertical plugins specified separately) Anyway, I will attempt to sketch out the circuits of all three versions. The dummy units could easily be adapted for the H cal unit, maybe with some difficulty for the V cal unit. Some time ago it occurred to me that it should be possible to design a circuit enabling them to be converted into a component tester. When I have done my bit, maybe one of the brighter members will design such circuit. I did think it would need a small powered transformer, but since there are +24v, -24v and of course 0v supply lines, there may well be a way without an onboard transformer. When it is eventually complete, I will post it as a separate thread. Les.