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Old 20th Apr 2018, 11:36 pm   #17
peakfour
Triode
 
Join Date: Apr 2018
Location: Buxton, Derbyshire, UK.
Posts: 21
Default Re: Telequipment/Tektronix D75 No trace on Power Up.

We have lift-off, well taxiing anyway.

After changing a couple of transistors on PC128, all PSU voltages are now about right and I can get both traces on the screen; I can even get a waveform display, from the +1v Square wave output under the CRT, though it's a bit fuzzy.

As regards the other two outputs from the Right Hand amp, neither will display on this scope. The sawtooth however will come up on a different older scope, but nothing from the square wave output.

On/off switch works, but the intensity pot doesn't seem to have any effect.

It's a start anyway, though I had to knock off for the evening when the macaroni cheese was served.
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