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    How to get two Sweep and Repeat Generators in sync.

    What is the best way to make a sign wave shift frequency downward only about 10 Hertz, then repeat every .2 seconds. The initial frequency 3000 Hz. There will be 2 generators sweeping, both will be in sync (repeat at the same time). See attachment for drawing.
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    Microwave Oven Door Perimeter Seal

    On the microwave oven door itself, on the inside of the door around the perimeter there are a number of cavities. You must pop off a removable plastic cover inside the door to see them. The cavities are formed from a bunch of bent tabs 3/4 inch wide, 3/4 inch deep, and are spaced every 3/8...
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    Double Sheet Detector

    I was just considering attenuation of the sonic signal to determine if 2 sheets were present then less sound would get through.
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    Double Sheet Detector

    I am new here. I am in need of a circuit to detect and warn me when 2 sheets of paper board (about 2 credit card thickness) and only 1 sheet is present. I know a piezo transducer and receiver at 40 kHz is the correct frequency so I ordered the TCT40-16R/T piezo tranducer receiver pair. The...
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    Combining Two Waves Experiment

    Yes I've heard this before being infulenced. Both generators are old tectronics tube type but are very well built and stable.
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    Combining Two Waves Experiment

    This is my first post here so I hope everything is ok. - I read the rules. Do rf sign waves have a small attraction for each other when they are near the same frequency? I thought that electronics men might know why this happens. My experiment shows that they have some attraction for another...

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