Hello, with my new coil, I have strange oscillation who appear for certain plunger settings when I want to make the minimum of phase shift . In this case the sound of sparks are not regular and an oscillation appears at the lower signal output of full brige (vdc = 50V)
Measure of resonnance frequency of primary alone 157khz, secondary alone 153khz

have you ever met this





tesla Detail 80 180.txt

hello
I have a new Tesla coil in progress .
I'm wondering questions about pimary coil.
the secondary has a length of 70cm 8cm dia with 0.20mm copper wire (about 2300 / 2400 turns), this to obtain lower resonant frequency.
for the primary what is best to achieve 5 turns or 10 turns (with change of capacitance). Does this have an influence on the length of the sparks?

Mesure afternoon frequence secondary = 153khz 74mH 394 Ohms (dc)

Specs Coil PVC 8 cm DIA 0.20mm FIL 2400 TOURS 18cm 37cm tore v3 ok.txt

Hello all,
I had planned to replace a driver (chinese) which works correctly with a full bridge. for which I have already sent several posts in the forum
see https://highvoltageforum.net/index.php?topic=1386.0

the Chinese yumbao driver worked correctly with the full bridge (GDT, 2 IGBT; CM200- DU -12F)

I started testing the UD2.7 driver since 3 weeks, with resistors instead of the tesla coil everything is ok
to day I make connections to use the new ud2.7C big problem : the driver and the gdt (test winding) does not give very satisfactory signals without HT



after I put into service a HT about 80V the current of the 24V power supply UD2.7C was high (2.9A???) and the protections: diodes on resistance and protection diode 1N5819  and J18Ca were very hot (smell burn)

On the diagram there are 4 diodes on the gate resistance

I didn't understand anything, tomorrow I'm welding new components

Good morning all.

Did someone manage to get this driver to work correctly with a current sensor on the feedback input ? Seller Source Ebay or Ali (2019 NEW Tesla coil DRSSTC SKP jump pulse driver + Arc extinguishing controller)



I spent time in experimentation: it is a failure for me with this driver. For me, it only works with a generator connected to the feedback
Info sur kechuang-org and 4vh.org

https://translate.google.com/translate?hl=fr&sl=zh-CN&tl=en&u=https%3A%2F%2Fwww.kechuang.org%2Ft%2F83919&sandbox=1

Hi, does anyone know the driver below
is this valid for have good performance ? how to use the optical connector HFBR 2521
where I can buy a driver fully equiped with phase correction, OCD, Feed back ?
Thank you