Fusor Forums

Hey,
Just an idea so you make your grid as Mark said
Take a look at this approach viewtopic.php?f=6&t=2484

Got a 100ohm 10-watt resistor (read 99.8 ohms in the DMM) and measured its voltage across like this: https://farm8.staticflickr.com/7914/33223790808_454ecac674.jpg Also, I soldered three diodes in each leg and floated the string in the air as Richard said –> no more arcing. Couldn't test voltage and...

I am in the process of installing a current meter so I can confirm the obvious: the fusor is pulling too much current and that’s why I am getting these voltages. Dennis, I did try the single pole approach and indeed get 7.5 kV when there is only the HV divider as load, when demo fusor is operated I ...

Denis, with your approach I could get 7.5kV just with the HV divider as the load. With the fusor, I couldn't go above 3kV. I tried silicon on the diodes (still on plywood) and the rectifier seems more stable. Still, I won't go over 8kV as arcing starts about there but for 7.5kV it seems to work fine...

Thanks, Richard. I was asking about the variac because I didn't understand what was meant by Rich "Can you test your rectifier now with 120 or 240 volts, and see if it's still functional?[with the variac]". Rich thanks for the info, you are right! So today I removed the diodes from the PVC pipe and ...

Hey Rich, Here is a diagram of the system (it is the Make photo translated) https://farm8.staticflickr.com/7894/47025200532_3379b66791_z.jpg In my case, I did use the center tap as the ground for the full wave rectifier (not half wave, as the picture incorrectly says) and the voltage divider. But wi...

So while making a high voltage divider to use with a multimeter I decided to test it with a 15kV 30mA NST. What I did is hook the divider to one of the terminals and the other end to the NST's ground – voltmeter read 0.8 volts AC, which means around 8,000V. While it isn't super accurate (it was cali...

Great work Joe!

I am curious as to how you set up your vacuum and D2 system. Does your setup use any valve between the pump and chamber? If not, how do you manage to not waste so much D2?

Looks good! If I may ask, where did you get that nice air cooled diff pump? Those are hard to get nowadays :) Also, for the vacuum gauge I highly recommend the MKS 901p transducer, I have a post (and also others) on how to set it up very easily with an Arduino board and LCD/OLED display, very cool l...

You are not the first to try to see if the transducer works by mouth sucking, a very sophisticated method indeed