Search found 45 matches

by John Myers
Tue Mar 13, 2018 7:58 am
Forum: Vacuum Technology (& FAQs)
Topic: Capillary tubing & connectors for chromatography for D2?
Replies: 5
Views: 337

Re: Capillary tubing & connectors for chromatography for D2?

It looks like a gas chromatography column, but not sure why it would be flattened.
by John Myers
Fri Mar 09, 2018 4:17 am
Forum: New User Chat Area
Topic: Muon Catalyzed Fusion
Replies: 14
Views: 788

Re: Muon Catalyzed Fusion

viewtopic.php?f=21&t=8164

He also has a few other related free Ebooks for download on the site.
by John Myers
Wed Mar 07, 2018 4:32 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Reusability of Swagelok
Replies: 13
Views: 698

Re: Reusability of Swagelok

Ferrules aren't meant to be removed and re-crimped on a new tube. If you manged to get one of it would probable be too deformed to get back on a new tube.
At work I reuse the nuts all the time, just cut of a section of the tube and add new ferrules.
by John Myers
Wed Jan 24, 2018 5:37 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: The Beginnings of a Fusor Electrical System
Replies: 59
Views: 7977

Re: The Beginnings of a Fusor Electrical System

It looks to me that the two primary's are meant to always be in parallel. Putting primary's in parallel is done to increase the current that can be transferred to the secondary not to increase the voltage at the secondary. I agree with Richard about the 120/220V based of the resistance difference be...
by John Myers
Thu Jan 18, 2018 11:36 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: High Voltage Supply for PMT
Replies: 9
Views: 623

Re: High Voltage Supply for PMT

I think it's an 'economy of scales issue' where it's not really worth it for distributors like Mouser and Newark to sell CCFL transformers anymore. Especially with LED's taking over. You'll likely need to buy straight from the manufacture. CTX210609-R is obsolete but there may be other similar parts...
by John Myers
Wed Jan 17, 2018 4:31 am
Forum: The Trading Post
Topic: Does anybody want 40kv wire?
Replies: 2
Views: 297

Re: Does anybody want 40kv wire?

What gauge is the wire?
by John Myers
Mon Jan 08, 2018 3:34 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: The Beginnings of a Fusor Electrical System
Replies: 59
Views: 7977

Re: The Beginnings of a Fusor Electrical System

The center tap of that transformer is grounded to its own metal case.

The meter and sense resistor is connected in between system ground and the metal case of the transformer.
by John Myers
Thu Jan 04, 2018 9:57 pm
Forum: Books & References
Topic: SolveSpace CAD
Replies: 3
Views: 1150

Re: SolveSpace CAD

The major selling point would be that it's open source; for those who find that important.
by John Myers
Thu Jan 04, 2018 9:52 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Electrometers and Picoammeters
Replies: 14
Views: 1699

Re: Electrometers and Picoammeters

Would be nice to make the rest of the circuit with op amps, for example, rather than endless carefully matched bipolars and passives everywhere.
You can use an op-amp or two to replace the analog backend since op-amp are just a packaged version of all that circuitry.
by John Myers
Thu Jan 04, 2018 5:22 am
Forum: Books & References
Topic: SolveSpace CAD
Replies: 3
Views: 1150

SolveSpace CAD

SolveSpace is a free and open source [GitHub] computer aided drawing program (CAD).
I haven't used it yet but it looks like it could be a good choice for modeling fusor's and ion guns.