[neonixie-l] Re: IN-9 with pulse wave power supply

I use two MPSA42 in parallel to replace the MJE340 transistor. If only use one MPSA42, the transistor become hot quickly. So I decide to use two of them. -- You

[neonixie-l] Re: IN-9 with pulse wave power supply

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[neonixie-l] Re: IN-9 with pulse wave power supply

In my opinion, the plasma always ignited from the bottom,because the gap there is smallest. After ignition, the plasma slide along the cathode to the portion with lowest resistance. Sorry for my pool English. I think you can understand me. gregebert於 2017年4月29日星期六 UTC+8下午11時12分55秒寫道： > > I

[neonixie-l] Re: IN-9 with pulse wave power supply

wave pulsed DC. > > On Saturday, 29 April 2017 05:17:44 UTC+1, start end wrote: >> >> https://youtu.be/mwD-WWELFqY >> >> With DC high voltage power supply, the plasma didn't anchor to the >> bottom. With 50Hz square wave pulse current, the tube worked correctly. >

[neonixie-l] Re: IN-9 tube gas discrepancies and cathode poisoning issues

With DC high voltage power supply, the plasma didn't anchor to the bottom. With 50Hz square wave pulse current, the tube worked correctly. https://youtu.be/mwD-WWELFqY

[neonixie-l] Re: IN-9 with pulse wave power supply

Thank you for your reply. Of course I used a current-controlled power supply. In addition to it, I added a 555 timer to trim the continuous current into 50 Hz square wave pulse current.

[neonixie-l] IN-9 with pulse wave power supply

https://youtu.be/mwD-WWELFqY With DC high voltage power supply, the plasma didn't anchor to the bottom. With 50Hz square wave pulse current, the tube worked correctly. There are many advantages with pulse power supply: 1. Saving energy 2. Stabilizing the plasma 3. Reducing heat emission 4.