Search found 108 matches

by Mike Veldman
Tue Apr 21, 2015 2:53 pm
Forum: Vacuum Technology (& FAQs)
Topic: Mounting Magnetron
Replies: 29
Views: 10263

Re: Mounting Magnetron

In the majority of microwave applications I've worked with, the probe from the RF source is perpendicular to the waveguide not parallel. You will also need a waveguide sized to the frequency of the RF source. I suspect the arrangement pictured above will cause magnetron heating, possibly to the poin...
by Mike Veldman
Thu Mar 20, 2014 2:22 pm
Forum: Images du Jour
Topic: Archived - Update For Demo Fusor
Replies: 7
Views: 2812

Re: Update For Demo Fusor

Richard pretty well duplicated what I told you to do when I gave you the chamber.

mike
by Mike Veldman
Fri Sep 06, 2013 1:36 pm
Forum: Vacuum Technology (& FAQs)
Topic: AC Window Unit Compressors
Replies: 25
Views: 6469

Re: AC Window Unit Compressors

Thanks for the personal history lesson it helps. Perhaps you should have mentioned this was a "play time" project and saved yourself our attempts to save you time and trouble. I played some in the 70s running refrigeration compressors as engines. Both using actual steam and freon 504 as the working ...
by Mike Veldman
Thu Sep 05, 2013 1:27 pm
Forum: Vacuum Technology (& FAQs)
Topic: AC Window Unit Compressors
Replies: 25
Views: 6469

Re: AC Window Unit Compressors

Way back in the 60s I played with cascaded compressors as vacuum pumps. I was a kid with limited funds and there were some articles in Scientific American amateur scientist column which suggested they'd work. BZZT! They did make some vacuum, at the cost of refrigerant oil back-streaming all over the...
by Mike Veldman
Tue Aug 27, 2013 1:33 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Resonat Chamber
Replies: 2
Views: 1248

Re: Resonat Chamber

I did some playing many years back with RF generated plasmas in a vacuum. Along those lines, as a thought experiment only, I've thought about containing a fusion possier in an RF field. My reoccurring daydream is two or three matched microwave oven magnetron, waveguides, variable power supplies all ...
by Mike Veldman
Wed May 29, 2013 12:51 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: 13 years old building a fusor-Looking for help
Replies: 30
Views: 6911

Re: 13 years old building a fusor-Looking for help

Maybe a proactive stance will further your goals. Read the posts, descriptions and FAQs on this site. Look at the images. See how others overcame the obstacles. Improvise, adapt, and in the process you'll develop practical skills. There is no one way to do any of this. If you are as lucky as the res...
by Mike Veldman
Wed May 22, 2013 1:18 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Arkansas or Oklahoma fusors!
Replies: 1
Views: 788

Re: Arkansas or Oklahoma fusors!

I guess I can qualify for that. There may still be some pictures of mine in the images section. I haven't looked since the move. You can message or e-mail me if you like. vmike@okstate.edu

mike
by Mike Veldman
Wed Jan 09, 2013 1:54 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: mentor
Replies: 4
Views: 1312

Re: mentor

I suspect, if you read the FAQs and ask your questions in the correct forum, someone will try to help you.

mike
by Mike Veldman
Fri Jan 04, 2013 1:47 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Mini-five minute fusor
Replies: 12
Views: 4977

Re: Mini-five minute fusor

<t>Here are a couple of pictures of some tiny demo fusors I made up a few years back. The second one is the smallest I made during my quest for tinyness. It's made from a jelly sample jar, about 1 ounce in size, pretty close to the size of a golf ball. The other two are an olive jar and a baby food ...
by Mike Veldman
Thu Dec 20, 2012 3:16 pm
Forum: Images du Jour
Topic: Archived - My first (almost) perfect star!
Replies: 14
Views: 4849

Re: My first (almost) perfect star!

<t>I would strongly suggest you not drill the glass itself. The hole in the glass weakens the entire envelope. You can bring all the vacuum and voltage lines through the top plate. Use JB weld to seal the feed through into the top plate. Years back I used the mason jars for an in service class of sc...