misc comments
Batteries need to be used plain and simple. The best results are with batteries. Anyone that recommends otherwise is simply not doing the experiments themselves.
As a note, I experimented with a few setups with the inductive resistors.
2 identical resistors tightly next to each other wired Tesla bifilar pancake style gives a bit bigger spike for the same input, but the heat is spread over more wire for a lower peak temperature. So it doesn't seem to be an advantage so far. Maybe at longer times the temp will get up but there will probably be a bit bigger charge to the batt. Maybe will do a longer test later.
2 identical resistors simply in parallel would bring the 10 ohm resistors to 5 ohm of resistance. More heat but more wattage too so no advantage here.
Single coil seem to be best so far per energy entered for highest temperature plus charge back to battery.
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I'm using a bigger inductive resistor than I had in my vids/pics.
The one now is 10 ohm 100 watts Ohmite resistor with 24 uH of inductance. That is 3 times the inductance of the one Rosemary used.
With a resistor this much bigger, it can easily keep up with the frequency and the off on is as good as the smaller one. I have a 96 uH one that is 10 ohm 250w and will test later but I don't think there is any problem keeping up with switching speeds.
The 24uH one I'm testing now seems to be getting to a lower temp compared to the much smaller resistor. The ratio of the spike to the input pulse appears to be about the same as the smaller one.
With the diode removed, the ringing is distorted and with the diode, the ringing is nice, solid and sharp.
I have 171 ohms at the gate with a Bourne precision 1k pot that is a 10 or 15 turn one. Extremely precise.
Anyway, just a few comments.
Batteries need to be used plain and simple. The best results are with batteries. Anyone that recommends otherwise is simply not doing the experiments themselves.
As a note, I experimented with a few setups with the inductive resistors.
2 identical resistors tightly next to each other wired Tesla bifilar pancake style gives a bit bigger spike for the same input, but the heat is spread over more wire for a lower peak temperature. So it doesn't seem to be an advantage so far. Maybe at longer times the temp will get up but there will probably be a bit bigger charge to the batt. Maybe will do a longer test later.
2 identical resistors simply in parallel would bring the 10 ohm resistors to 5 ohm of resistance. More heat but more wattage too so no advantage here.
Single coil seem to be best so far per energy entered for highest temperature plus charge back to battery.
----------------------
I'm using a bigger inductive resistor than I had in my vids/pics.
The one now is 10 ohm 100 watts Ohmite resistor with 24 uH of inductance. That is 3 times the inductance of the one Rosemary used.
With a resistor this much bigger, it can easily keep up with the frequency and the off on is as good as the smaller one. I have a 96 uH one that is 10 ohm 250w and will test later but I don't think there is any problem keeping up with switching speeds.
The 24uH one I'm testing now seems to be getting to a lower temp compared to the much smaller resistor. The ratio of the spike to the input pulse appears to be about the same as the smaller one.
With the diode removed, the ringing is distorted and with the diode, the ringing is nice, solid and sharp.
I have 171 ohms at the gate with a Bourne precision 1k pot that is a 10 or 15 turn one. Extremely precise.
Anyway, just a few comments.
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