UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Fisher TFM1000 pulse count detector-How does it work?

ms660 · 1st Sep 2019, 2:18 pm

Have a look at this video for a basic understand of a simple "pulse counting" detector:

https://www.youtube.com/watch?v=jQlN2fc7LJc

The delay line in the Fisher is not terminated, watch this video to see what happens when a transmission line is not terminated with anything:

https://www.youtube.com/watch?v=I9m2w4DgeVk

Then bear in mind that whatever is flowing in the delay line is coupled by the delay lines capacitance to the next stage.

Lawrence.

1st Sep 2019, 2:18 pm	#9
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Fisher TFM1000 pulse count detector-How does it work? Have a look at this video for a basic understand of a simple "pulse counting" detector: https://www.youtube.com/watch?v=jQlN2fc7LJc The delay line in the Fisher is not terminated, watch this video to see what happens when a transmission line is not terminated with anything: https://www.youtube.com/watch?v=I9m2w4DgeVk Then bear in mind that whatever is flowing in the delay line is coupled by the delay lines capacitance to the next stage. Lawrence. Last edited by ms660; 1st Sep 2019 at 2:38 pm.