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Yamaha TX540 tuner not tuning
Yamaha TX540 tuner not tuning
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Old 6th August 2019, 12:19 AM   #221
anatech is offline anatech  Canada
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Yamaha TX540 tuner not tuning
Hi Glenn,
Yup, that looks exactly right

"Just because you can, doesn't mean you should" my Wife
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Old 6th August 2019, 06:46 AM   #222
Mooly is offline Mooly  United Kingdom
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Yamaha TX540 tuner not tuning
It sure does

I count 16 'tips' over 3 divisions which at 50ns per division is a total sweep of 150ns over that portion. Divide one into 'tother (150/16) and we get the time per cycle. Find the reciprocal of that which is 106,666,666.6666MHz and that gives us our local osc frequency.

We know the local osc has to be 94.9MHz PLUS 10.7MHz (the ever constant IF frequency) which is 105.6MHz.

So this is a really really good check on the calibration of the scope and I would say that result was excellent.
So definitely all good.
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Old 6th August 2019, 09:09 AM   #223
Glenn E is offline Glenn E
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Ok. Thanks for the feedback. Unit reassembled and back in service. Thanks again. It's been great working with you and the others who contributed. Glenn
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