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Registered Member #3722
Joined: Sun Feb 27 2011, 03:26PM
Location:
Posts: 7
I have several questions about this type of tesla coil. I have two brand-new pl519 penthode tubes. I also have a brand-new mot and 200vA pri.220v,sec2kV transformers. How long streamers can I get from these tobes connected in parallel, and is there any possibility of connecting secondary coils of mot and 200vA transformer. I also want to know is there any Medhurst formula that doesn't use table, but all data is inserted directlyinto the formula. Sorry If I've been confuzing, my english is not the best.;-)
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
You can possibly get some 20 cm sparks out of those two tubes in parallel, but the voltage output of a MOT is probably a bit too much for them and they might not last long. In any case do not use a doubler on the MOT, just rectify it with a single diode. To drive the tubes you can try connecting the grids together (except the suppresor grid which should be connected to cathode), with a ~4.7k grid leak resistor.
Registered Member #3722
Joined: Sun Feb 27 2011, 03:26PM
Location:
Posts: 7
Besause I have two pl504 i stock, can i connect them in parallel too so i prolong life of the tubes? also can I use dy802 (used in flyback tranformer in tv) diode to rectify mot output?
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Let me clarify you want to connect the two PL504's in parallel to the 519s? I wound not do that. To rectify the MOT I would use a MO diode, a small vacuum diode probably wont hande the current well.
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vttc based on pl519
