Search found 10844 matches

by Richard Hull
Wed Aug 15, 2018 10:23 pm
Forum: Images du Jour
Topic: PBS Interpretation of a fusor...
Replies: 3
Views: 186

Re: PBS Interpretation of a fusor...

Fabulous! This is the best fusor discussion I have seen in a popular internet or Television explanation related to amateur fusion. It is well done with no hype and a fine project directed at a laudable goal regarding educating kids and pointing them to higher goals be they fusion or not. Keep up the...
by Richard Hull
Wed Aug 15, 2018 10:13 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: DIY hermetic feedthroughs: Has anybody done this?
Replies: 5
Views: 214

Re: DIY hermetic feedthroughs: Has anybody done this?

Every hydrogen thyratron has a metal to uranium glass to boro-silicate glass seal for the anode. Other high power tubes,(xmitter power tubes,etc.), also use the U glass intermediate glass to metal seal.

Richard Hull
by Richard Hull
Wed Aug 15, 2018 5:21 am
Forum: Images du Jour
Topic: Berryville hamfest booty
Replies: 6
Views: 384

Re: Berryville hamfest booty

Good man! I, too, prefer 63/73 for my own work, but I have a lot of 60/40 laying around to use up and I tend to grab it when working on old vacuum tube gear, and I work on a good amount, bring stuff back to life. Both the tin-antimony and tin-silver-copper alloy ROHS solder look cold in solidus as f...
by Richard Hull
Sat Aug 11, 2018 6:34 am
Forum: Images du Jour
Topic: Farnsworth ITT history - a bit more
Replies: 3
Views: 374

Re: Farnsworth ITT history - a bit more

All metal, insulators, etc..... The entire guns became transparent, only the red ion beams inside were seen. They did not stay transparent when turned off. Happened on only two single occasions in the 6 years they used multiple guns. Totally non-repeatable.

Richard Hull
by Richard Hull
Thu Aug 09, 2018 2:38 pm
Forum: New User Chat Area
Topic: Maintaining a vacuum in the absence of a pump.
Replies: 7
Views: 372

Re: Maintaining a vacuum in the absence of a pump.

Ian is right. If you truly have a perfect seal on a vacuum device and if it is properly out-gassed, (baked or bombarded), including all the metals within it and also gettered when finally sealed, you can have an effective vacuum held virtually forever within it. Vacuum tubes of old managed this well...
by Richard Hull
Wed Aug 08, 2018 10:17 pm
Forum: Images du Jour
Topic: Farnsworth ITT history - a bit more
Replies: 3
Views: 374

Farnsworth ITT history - a bit more

Thanks to the recent efforts of Leland Palmer in opening up some of the documents related to the fusor effort, I will endeavor to push out a few photos and memories. I have visited Fort Wayne twice for the sole purpose of interviewing every living entity involved in the Fusor effort at ITT during th...
by Richard Hull
Wed Aug 08, 2018 4:38 am
Forum: Files
Topic: HAMFESTS - The ins and outs of surplus hunting
Replies: 2
Views: 3702

Re: HAMFESTS - The ins and outs of surplus hunting

This paper remains dated is some ways. Like my exhortation to have everyone wear a watch so you can all meet back at the car at a given time. Well, cell phones were not common in 1996. Now you can just text of call your family and riding buddies and tell them to get to the car as you going to leave ...
by Richard Hull
Wed Aug 08, 2018 4:13 am
Forum: Images du Jour
Topic: Berryville hamfest booty
Replies: 6
Views: 384

Re: Berryville hamfest booty

I now have a vast stock of these insulators. Most are E.F. Johnson. Every time I see them, I buy all of them. Hams have always highly prized these standoffs when building xmitters. That kind of ham is a distant memory now. Few old guys remain doing this and a newbie has his mom or dad buy him a Yaes...
by Richard Hull
Tue Aug 07, 2018 3:46 pm
Forum: New User Chat Area
Topic: Use of a Precipatator Power Supply
Replies: 17
Views: 797

Re: Use of a Precipatator Power Supply

Operator skill sets are accumulated very rapidly if superb instrumentation is at hand and the operator has a familiarity with ionized gas reactions to the application of varying amounts of electrical energy, as in a demo fusor. Most amateur fusioneers never acquaint themselves intimately with ionize...
by Richard Hull
Tue Aug 07, 2018 3:47 am
Forum: New User Chat Area
Topic: Use of a Precipatator Power Supply
Replies: 17
Views: 797

Re: Use of a Precipatator Power Supply

Lots of questions with no real way to estimate neutron numbers based on an iffy supply, unknown specific pressure, but most important operator skill which is not a scientific case, but one of pure artifice particular to the individual operator's ability to control the system via well done feedback o...