Search found 112 matches

by Nick Peskosky
Fri Jul 20, 2018 4:16 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: In-Vacuum Electrical Connectors
Replies: 4
Views: 6141

In-Vacuum Electrical Connectors

Does anyone have a low-cost source for Cu or Cu/Be in-vacuum electrical connectors used for stalks and other feedthrough assemblies? I'm looking for something similar to Cermatec barrel-with-set-screw type connectors, ideally without the megabucks cost? Even vacuum compatible compression or set scre...
by Nick Peskosky
Tue May 08, 2018 12:45 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: From Humble Fusor Beginnings
Replies: 4
Views: 7187

From Humble Fusor Beginnings

All, I've been actively lurking over the last two years or so even while my job in the Navy has pushed my neutron runs to the back burner. At the current moment I'm sending this update from a WiFi puck outside of Nha Trang, Vietnam where USN Seabees and USMC Combat Engineers are deep in the throws o...
by Nick Peskosky
Mon Sep 18, 2017 8:07 pm
Forum: Images du Jour
Topic: Fusor progress, Finn Hammer
Replies: 25
Views: 11012

Re: Fusor progress, Finn Hammer

Finn, The 1" bellows bypass valve should work exactly as intended assuming you have an appropriate 'leak' type valve on the D2 input. I use a manual SS-bellows Varian 2.75" Conflat right angle valve for my gross pressure control between the chamber and the throat of my turbomolecular pump and it wor...
by Nick Peskosky
Tue Sep 12, 2017 6:51 pm
Forum: Images du Jour
Topic: A good deal.
Replies: 9
Views: 4045

Re: A good deal.

Bruce nailed it before I had a chance to chime in as well. Check to ensure the Quattro is actually transitioning from the Pirani element to the hot-cathode sensing element in the gauge head. My Inficon BPG-400 will actually indicate a decrease in pressure and then between 15-30mTorr sensed pressure,...
by Nick Peskosky
Wed Aug 16, 2017 4:56 pm
Forum: Vacuum Technology (& FAQs)
Topic: Cheaper Vacuum Grease
Replies: 11
Views: 5052

Re: Cheaper Vacuum Grease

Paid just slightly more than this when I grabbed a similar size container of Apiezon M (excellent vapor pressure curves to 10E-9 Torr) but if you don't need industrial quantities I recommend a cursory search of ebay. I have a small 5mL vial that has been more then sufficient to disassemble and re-as...
by Nick Peskosky
Tue Aug 15, 2017 3:47 pm
Forum: Vacuum Technology (& FAQs)
Topic: TMP Diagnosis
Replies: 31
Views: 22110

Re: TMP Diagnosis

Jackson, If you are looking to make the leap into disassembling the TMP and cleaning it, I recommend you consult my older post on the ins-outs of this process: If the turbo spins freely, my money is on the cont...
by Nick Peskosky
Thu Jun 29, 2017 5:44 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Spellman DXM70N600X3547 power supplies on ebay -70kV 8.56MA
Replies: 157
Views: 82093

Re: Spellman DXM70N600X3547 power supplies on ebay -70kV 8.5

It's been a while since I have been able to chime in on this thread but I was lucky enough to score one of these supplies while I was deployed most recently over in Japan. Cobbled together a breadboard analog controller over the weekend and was able to make this supply come to life (confirmed with a...
by Nick Peskosky
Sun Mar 19, 2017 1:51 am
Forum: Images du Jour
Topic: John Beutz Fusor... The Story so Far
Replies: 24
Views: 12000

Re: John Beutz Fusor... The Story so Far

First and foremost, don't get discouraged! Farnsworth-Hirsch Fusors are a multi-discipline system that span a range of topics, some of them quite advanced even for the technically inclined, which is the exact reason our amateur neutron club list is as short as it is. The bad news: Speaking for every...
by Nick Peskosky
Tue Nov 08, 2016 11:38 am
Forum: Vacuum Technology (& FAQs)
Topic: Bake-out procedure
Replies: 4
Views: 3551

Re: Bake-out procedure

I'm sure this has been answered before on this forum else a cursory search with your favorite search engine spits out:
by Nick Peskosky
Mon Oct 31, 2016 1:24 am
Forum: Vacuum Technology (& FAQs)
Topic: Using an RGA to detect fusion
Replies: 7
Views: 3481

Re: Using an RGA to detect fusion

In theory yes it might be possible but the gear required is probably scant available to the amateur Fusioneer. Open Ion Source (OIS) RGAs that couple a quadropole element with an electron multiplier are the most common devices on the market. Unfortunately, the minimum operating pressure required for...