Search found 1301 matches

by Frank Sanns
Sun Apr 11, 2021 2:52 am
Forum: Announcements and Site Administration Topics
Topic: Neutron Club / Recycled Fusor
Replies: 10
Views: 295

Re: Neutron Club / Recycled Fusor

The He-3 tube may not be the best choice for pulsed Fusor work. The signal coming from He-3 tube is feeble compared to that from a Boron-10 (BF3) tube. It also contributes way more to the background count. An equivalently large 1"x22" BF3 tube will only give around 2 counts per minute of background....
by Frank Sanns
Sat Apr 10, 2021 5:57 pm
Forum: Announcements and Site Administration Topics
Topic: Neutron Club / Recycled Fusor
Replies: 10
Views: 295

Re: Neutron Club / Recycled Fusor

We are not a plug n play forum. I call no joy for such scenario. This is one of the problems with 6 or 8 year olds “building” a Fusor with their parents. It has to be the individual or group of similar individuals building on their own. With that said though, it would be difficult to imagine someone...
by Frank Sanns
Sat Apr 10, 2021 1:31 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Long Lasting Bubble Detector
Replies: 6
Views: 286

Re: Long Lasting Bubble Detector

Self discovery and thinking for yourself is a thing of the past. We, as a society in the US have devolved into tearing people down for the minutia. Where even minor imperfection is cause to destroy a person's life or career. Safe zones just produce gatherings of the weak, self absorbed, blinder wear...
by Frank Sanns
Fri Apr 09, 2021 2:10 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Long Lasting Bubble Detector
Replies: 6
Views: 286

Re: Long Lasting Bubble Detector

I examined the couple of mine that failed in the several months window. I am not impressed with the design of the seal on these units. It is like a kids toy rather than a precision measuring device. For the price point, they are a scam. Sure they look nice with the knurled black knobs but it is what...
by Frank Sanns
Tue Mar 16, 2021 2:44 am
Forum: Control and Instrumentation Hardware and Software
Topic: Software to collect and display measured data.
Replies: 16
Views: 1245

Re: Software to collect and display measured data.

I guess we have come a long way from counting blocks on chart recorder paper! The early part of my career was before computers. We had to be resourceful and used chart recorders for everything. They had variable speed and gain and one of the projects I was working on used six transducers that the en...
by Frank Sanns
Sat Mar 13, 2021 9:44 pm
Forum: Announcements and Site Administration Topics
Topic: Two new forums added
Replies: 3
Views: 418

Two new forums added

As the site continues to evolve over the decades, new forums are sometimes needed. Two new ones are have been added. We now have a Primary Sources for Fusor Related Items forum in the Trading Post. This is the place to go if you are looking for specific items. I have moved relevant posts from the Fo...
by Frank Sanns
Mon Feb 01, 2021 11:09 pm
Forum: Items For Sale
Topic: Rich Feldman's store. Today's feature: beryllium sheet
Replies: 17
Views: 5029

Re: Rich Feldman's store. Today's feature: beryllium sheet

EDM under oil is the only reasonable way to work with beryllium. Grinding or sawing, even wet sawing is just dangerous. You do realize that there are always fines with the coarse. Doing it outside is not a guarantee of safety either. With the wind at your back or side, you will have vortices that wi...
by Frank Sanns
Sat Jan 23, 2021 11:45 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: A 50kV supply with 33mA drive ability
Replies: 19
Views: 3164

Re: A 50kV supply with 33mA drive ability

Finn, My wire winder was the two handed one. Early on I did use my father's small lathe but it was too powerful and I did not want to have the wire grab and pull my hand in or slice through it. The lathe was only The biggest project I every did by hand was around 4 miles of 22 gauge magnet wire on a...
by Frank Sanns
Sat Jan 23, 2021 2:00 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: A 50kV supply with 33mA drive ability
Replies: 19
Views: 3164

Re: A 50kV supply with 33mA drive ability

Winding fine wire on coils is challenging. Too loose and they slide off. Too tight and they pull to the side as the layers increase and they slide off. A solution that I have used with nearly 100% success is to spray the windings with some clear fast drying urethane or lacquer. Just enough to make i...
by Frank Sanns
Thu Jan 07, 2021 4:18 am
Forum: Advanced Technical Discussion Area
Topic: RGA to Analyze Ion Beam Composition
Replies: 8
Views: 2154

Re: RGA to Analyze Ion Beam Composition

I can only say that plasma travels a long way in a vacuum. Even locating a device off axis, far away, or down the vacuum line does not guarantee that high voltage cannot get to your sensor. I am on my third thermocouple vacuum gauge because of it. Some people have the same problem that I have had wh...