Originally posted by Lidmotor
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First a bit of info I don't think I have placed in public yet, maybe wrong, brain cell loss great lately.
Anyway the voltage developed by a SEC 15-3 (PCB) is limited by two things, the Transistor and the type of Load. When you use a Neon, the Vo (voltage out) is limited to the breakdown voltage of the Neon. Now in the SEC 15-20 the design used multiple AV Plugs which each developed their own Vo and at the end of the line was the Neon that was limiting. When using LED's the Vo is set by how many LED's you have in series or parallel and will rise for a series string to a level that will cause the reverse breakdown in the transistor to destroy it. There is in theory the possibility of developing 'infinite' voltage, except we run into many, many limitations, such as the circuit itself, ionization, humidity etc., so limits exist, yet you can get it up there.
Another thing that set the voltage and I will not go into detail, is the bandwidth of the Exciter. Next is the bandwidth and what actually responds to the output, this is where people can sometimes light FL's and Neons and sometimes only one or the other.
Looks like you are getting a better feel for this little beast
The Sec 18 will blow you away and it has a built in tuning indicator and Beta loss protection along with no L1.Great work indeed you are doing.............

I was just trying to help those of us with meager means get a handle on the "little beast". I am on your side. Accurate measurement is way more complicated than it seems if I understand you correctly. I found and read the Measurements Document that you posted and the next thing that I have to do is build the filters and buy a better (shielded) meter. You CAN NOT just stick a cheap meter on a cap or battery and tell anything. There is too much RF flying around and the variables with the caps, batteries and local environment make the readings meaningless.
Still would like to know if you really meant the 500V part though.
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