 Coil decision
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Michael W.
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Registered Member #50
Joined: Thu Feb 09 2006, 04:07AM
Location: Vernon, B.C, Canada
Posts: 324
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Alright I'm in business now. I've managed to get a function generator and a scope to tune with, I'm guessing first I'd like to find the Res. Freq. of the secondary so I hooked it up like its described here.... 
But when sweeping I don't seem to get a spike on the scope. Does anyone have a tried and true method of tuning with a scope?
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Hazmatt_(The Underdog)
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Registered Member #135
Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
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You won't get a spike, you get a dip. At resonance the signal will just about flatline on the scope because you have a divider network between the resistor and the tuned system.
You may get a couple of small dips after the fundamental too, those are harmonics, so be careful to watch for the first big dip in signal strength, that will be Fo.
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