Search found 19 matches

by David Housley
Fri Jan 11, 2013 12:56 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Polarity Question.
Replies: 8
Views: 3603

Re: Polarity Question.

<t>We are using a Ross engineering high voltage relay under dialax HV transformer oil, with an appropriately sized dump resistor, also under the oil, such that when the high voltage is shut off, it will automatically dump the charge on this cap and those in the C-W. This has been a safety system in ...
by David Housley
Fri Jan 11, 2013 12:40 am
Forum: Vacuum Technology (& FAQs)
Topic: Vacuum solder compatibility.
Replies: 4
Views: 3268

Re: Vacuum solder compatibility.

This is interesting, Richard, about soldering glas and ceramic to metal with good wetting...Do you have any more information, or possible links to any more information?
Thanks!
by David Housley
Wed Jan 09, 2013 1:30 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Polarity Question.
Replies: 8
Views: 3603

Re: Polarity Question.

<t>I believe Carl's main intent is to use this as a high voltage filter cap to reduce ripple (yes, I know the various arguments pro and con regarding ripple ). I know this type of pulse cap is often used at negative potentials, case grounded, and we don't expect high discharge currents in a filter c...
by David Housley
Thu Jun 07, 2012 8:30 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Carl Willis posting on E-Bay 3He tubes
Replies: 2
Views: 2320

Re: Carl Willis posting on E-Bay 3He tubes

<t>I am very grateful to Carl for selling me one for our NWNC teaching consortium. It definately rounds out a group of detectors, and will provide one of the best neutron detectors available. I am going to encase it in a thin brass tube to protect it without decreasing its sensitivity, and of course...
by David Housley
Sat May 05, 2012 5:10 am
Forum: Vacuum Technology (& FAQs)
Topic: Baratron
Replies: 12
Views: 5267

Re: Baratron

Thank you, Steve I will definately study the reference. I really appreciate your insight and experience, and willingness to share it! I'm sure I'll have more questions as I learn more.

Thanks,
David H.
by David Housley
Thu May 03, 2012 11:50 pm
Forum: Vacuum Technology (& FAQs)
Topic: Baratron
Replies: 12
Views: 5267

Re: Baratron

Thanks, Chris, this is definately useful advice. I was thinking along the same lines, i.e., a non-heated baratron---given how the sessions run, long warm up times don't fit the model well. Any other thoughts or ideas are very welcome.
Thanks,
David H.
by David Housley
Thu May 03, 2012 11:08 pm
Forum: Fusion --- Past, Present, and Future
Topic: Completion of ITER's 493 anti-seismic pads.
Replies: 5
Views: 3296

Re: Completion of ITER's 493 anti-seismic pads.

And I suspect many of those farts produce more energy than most tokamaks.. (Sorry, I Just HAD to...)

David H.
by David Housley
Thu May 03, 2012 11:00 pm
Forum: Vacuum Technology (& FAQs)
Topic: Baratron
Replies: 12
Views: 5267

Re: Baratron

<t>Thank you everyone, for your experienced, well versed responses--I am taking careful note of them all! The Piranni gauges are available for reasonable prices, are robust, and easy to use. The only downside I can see is that their calibration is gas sensitive, whereas the Baratron is not.<br/> Our...
by David Housley
Thu May 03, 2012 1:56 am
Forum: Vacuum Technology (& FAQs)
Topic: Baratron
Replies: 12
Views: 5267

Re: Baratron

<t>Thanks, Steve for your reply. I apologize, I should have referenced that Baratron is an MKS tradmark, and that they are considered the high end diaphram capacitance gauge. The fact that you work for them and contribute to this board has great sway towards an MKS Baratron as well.<br/> From what I...
by David Housley
Wed May 02, 2012 10:15 pm
Forum: Vacuum Technology (& FAQs)
Topic: Baratron
Replies: 12
Views: 5267

Baratron

<t>Hi, Group<br/> I work with Carl Greniger with his fusor and the group of teens who run it. As was posted in the announcements forum, we recently upgraded from our bell jar to a very nice stainless steel chamber. A big thanks goes out to Robert Tubbs who has provided advice, parts, and a beautiful...