Search found 325 matches

by Bob Reite
Tue Mar 09, 2021 1:52 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Custom Fusor Power Supply
Replies: 13
Views: 1864

Re: Custom Fusor Power Supply

Nice job on those transformers!
by Bob Reite
Fri Feb 26, 2021 2:46 am
Forum: Items wanted
Topic: Seeking ballast resistor
Replies: 6
Views: 487

Re: Seeking ballast resistor

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.
by Bob Reite
Mon Feb 22, 2021 9:49 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Mass flow controller question
Replies: 20
Views: 2026

Re: Mass flow controller question

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.
by Bob Reite
Fri Feb 19, 2021 3:09 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Mass flow controller question
Replies: 20
Views: 2026

Re: Mass flow controller question

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.
by Bob Reite
Wed Feb 17, 2021 11:46 pm
Forum: Images du Jour
Topic: Auxiliary Electronics Module
Replies: 2
Views: 449

Re: Auxiliary Electronics Module

Yep, there is a lot to be said for old school relay ladder logic with physical relays, not fragile PLCs
by Bob Reite
Wed Feb 17, 2021 11:37 pm
Forum: Announcements and Site Administration Topics
Topic: Not a covid post! Get ready for the vacuum
Replies: 18
Views: 2792

Re: Not a covid post! Get ready for the vacuum

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.
by Bob Reite
Fri Feb 12, 2021 2:16 am
Forum: Vacuum Technology (& FAQs)
Topic: info about TPH-050
Replies: 5
Views: 491

Re: info about TPH-050

For the lube oil, try turbovacuum.com, idealvac.com or provac.com. There may be other vendors that I have missed.
by Bob Reite
Thu Feb 04, 2021 3:39 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Extremally cheap HV feed through (if you have a lathe in hand)
Replies: 18
Views: 2053

Re: Extremally cheap HV feed through (if you have a lathe in hand)

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.
by Bob Reite
Thu Jan 28, 2021 9:34 am
Forum: Images du Jour
Topic: Six Inch Cross Fusor
Replies: 50
Views: 5990

Re: Six Inch Cross Fusor

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.
by Bob Reite
Tue Jan 19, 2021 12:08 am
Forum: Images du Jour
Topic: Six Inch Cross Fusor
Replies: 50
Views: 5990

Re: Six Inch Cross Fusor

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.