dragon,
I would think a scope should work, I use them a lot for finding self resonance of coils. Dont hook it up, just put the lead near the coil to pick up the field. Dont see why it would be too much difference, its just taking a voltage measurement i believe. I put 3 coils together and have been tuning them to try and replicate the cool vid Doc posted. I was using my scope to tune them but the AC hum in the scope was making it difficult to see the peak voltage. If i had a better scope that may not be a problem though. So i put an AV plug nearby and put my voltmeter across the LED and set the meter on the most sensitive DC voltage range and found it easier than using the scope to find the peak voltage frequency. Probably throws things off a little but i would think as long as you do the exact same tuning procedure on each coil it should at least get them all near the same resonance. Its tough though because even standing an inch closer can make a difference. Im wondering about the capacitor in the circuit, how to calculate its value if possible. My coils are resonant at just over 10MHz.
I would think a scope should work, I use them a lot for finding self resonance of coils. Dont hook it up, just put the lead near the coil to pick up the field. Dont see why it would be too much difference, its just taking a voltage measurement i believe. I put 3 coils together and have been tuning them to try and replicate the cool vid Doc posted. I was using my scope to tune them but the AC hum in the scope was making it difficult to see the peak voltage. If i had a better scope that may not be a problem though. So i put an AV plug nearby and put my voltmeter across the LED and set the meter on the most sensitive DC voltage range and found it easier than using the scope to find the peak voltage frequency. Probably throws things off a little but i would think as long as you do the exact same tuning procedure on each coil it should at least get them all near the same resonance. Its tough though because even standing an inch closer can make a difference. Im wondering about the capacitor in the circuit, how to calculate its value if possible. My coils are resonant at just over 10MHz.
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