Fusor Forums

Nice job on those transformers!

I'll have to look though the pile of parts that just came out of an old vacuum tube AM transmitter. Should be some 50K ohm 100 watt wirewound resistors in there.

Mine is a Sierra Instrumentation "Side track III" "cust code I-458 Range 0-10 SCCM Orifice .010" Gas H2. I found it on Ebay. Any MFC that can be set for 0-10 SCCM will do.

I use a 0-10 SCCM mass flow controller. I set the flow rate with a 10 turn pot. For my chamber, I usually operate between 3-5 SCCM.

Yep, there is a lot to be said for old school relay ladder logic with physical relays, not fragile PLCs

Although this can change as the date approaches, our local Murgas ARC Hamfest is still scheduled for the first Sunday in July. It is an outdoor "tail gate" hamfest.

For the lube oil, try turbovacuum.com, idealvac.com or provac.com. There may be other vendors that I have missed.

If you have a power supply capable of a constant current mode, operate a fusor in constant current mode and let the voltage fall where it may, after setting the voltage for the maximum you want under no load condition.

I am also at somewhat of a standstill because my feed through now has trouble making 29 KV without arcing issues. On the vacuum side no less.

What voltage are you hoping for? That's a pretty long insulator. If you go much over 35 KV, the sharp edges of the nuts on top are going to cause corona issues.