Originally posted by Kokomoj0
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is important to note, I am not inputting a sine wave to the transformer, I am
inputting a Square Wave. I wouldn't test for resonance using a sine wave input.
And because the primary is shorter but has .2 uf capacitance across it but
the secondary did not have added capacitance and I was pulsing the primary
at it's resonant frequency with it's added capacitance 530 khz, therefore the
secondary was free to oscillate with no added capacitance and it's resonant
frequency with no added capacitance is quite a bit higher than that, the
coupling is not tight and it's air cored. When I add 18 nF to the secondary the
secondary matches the primary frequency and the waveform gets bigger and pure sine wave.
Without the .2uF capacitance across the primary it's resonant frequency is
also in the Mhz. The primary coil inductance is 0.036 mH both combined and
the secondary coil inductance is 0.234 mH for the low voltage coils for
testing, and 61.6 mH for the high voltage coils I made.
That can also happen the other way with the secondary in resonance and the
primary oscillating much faster, which is probably what is seen with most
Tesla coils, Not a nice clean sine wave, because the primary is not oscillating
at the same frequency as the secondary, for best results I think the primary
should be made to oscillate at the same frequency as the secondary to get a
wave form like this below.
Tesla states the waveform should be almost perfectly sinusoidal from a Magnifying Transmitter too I read.
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I only showed it for curiosity sake it's nothing really useful. I just seen it on
the scope when I was messing about and took the snap to show it.
Cheers
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