Hi Kevin. To hear you have a function generator and scope is such a good thing to hear. There are quite a few of us here that will find any input you have to be extremely valuable. Your resistance measurement is already about 10 ohms higher than those here that appear to be having issues. We all suspect we have dud secondary coils. In the meantime though, getting the secondary resonance can help us get ours in the right state of tune while we sort out this secondary issue. If you get a chance, the best starting point would b to get a measurement of the secondary coil's inductance.
If you have a multimeter that can measure inductance, could you remove your toroid (try to leave you breakout point as is or remember how far it is sticking out from the toroid) and measure the inductance of the secondary coil? You can do this between the top of the coil and the IEC ground but if you can stick the probe at the base of the coil, that would be even more accurate.
The next most valuable piece of information would be the secondary resonance. A good starting point is here:
download/file.php?id=75You then start your function generator at about 200kHz and start winding it up until you notice a strong peak in the waveform. Turn it too far and it will drop again. So then turn it back and forward when you reach that point until you get the largest peak.
This was from the site:
http://www.hvtesla.com/tuning.htmlThere is also a video there demonstrating the method. Just a couple of notes though.
- Firstly, don't worry about that wire to represent a streamer. Just have the breakout point on the toroid and do the measurements when it is in that state.
- You may not get multiple frequencies where you notice a peak. That's what I observed anyway, but it makes finding the resonant frequency easier.
- For the connections that say to leave disconnected, connect them to ground/mains ground instead.
- Position your scope probe so it is pointing towards the breakout point. You may need to place it about 1-2 feet away if you can't see much on your scope.
We will be forever thankful for the data you can provide. If your coil has all the figures we are expecting, then some of us unfortunately got a bad batch.