Search found 188 matches

by Rex Allers
Sun Jan 14, 2018 3:54 am
Forum: Vacuum Technology (& FAQs)
Topic: Edwards E2Mxx pumps
Replies: 1
Views: 54

Re: Edwards E2Mxx pumps

After copying the image that Jackson posted of his pump, I noticed something that I don't think I have seen mentioned here before. A possible security concern for those who might care. -------- * Aside about posting images. Many digital cameras have GPS available these days. If the camera is enabled...
by Rex Allers
Sun Jan 14, 2018 3:52 am
Forum: Vacuum Technology (& FAQs)
Topic: Edwards E2Mxx pumps
Replies: 1
Views: 54

Edwards E2Mxx pumps

This is in response to Jackson Oswalt's thread... "A Bunch of Failures" http://www.fusor.net/board/viewtopic.php?f=6&t=12044 That thread was getting kind of long so I thought I'd reply in this one, just focusing on his Edwards E2M5 pump. In that original thread, I was going to suggest that a picture...
by Rex Allers
Tue Jan 02, 2018 9:11 pm
Forum: Vacuum Technology (& FAQs)
Topic: Turbotronik NT10/12/13
Replies: 9
Views: 277

Re: Turbotronik NT10/12/13

Jerry,

Thanks for sharing that. I got it when presented in the earlier thread. I joined the several partial schematic pages into one big png image. It should be attached to this post. Feel free to add it to the google drive location or anywhere else desired.
by Rex Allers
Mon Jan 01, 2018 10:44 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: A Bunch of Failures
Replies: 46
Views: 1088

Re: A Bunch of Failures

Checking the specs, the 5 in E2M5 model is 5 m^3/hr pumping speed which I convert as about 3 cfm.
by Rex Allers
Sun Dec 31, 2017 1:14 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Matsusada Power Supply Cable
Replies: 12
Views: 347

Re: Matsusada Power Supply Cable

Tom, I've looked again and still see no mention of any pin numbers on the 25-pin I/O connector. There are a few words about some of the functions but no associated pins. Am I missing something? The description of the connection on the HV cable sounds like the way Glassman supplies do it. They have j...
by Rex Allers
Thu Dec 28, 2017 11:45 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Matsusada Power Supply Cable
Replies: 12
Views: 347

Re: Matsusada Power Supply Cable

On polarity, he said the PN is WA6-30N, with the N implying negative, so OK. (30P would be positive.) As mentioned, making a HV cable should probably not be too difficult. I think the bigger problem is learning what the signals and controls are on the 25-pin connector. Maybe there is a label somewhe...
by Rex Allers
Mon Dec 25, 2017 1:46 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: A Festive High Voltage Load
Replies: 2
Views: 164

Re: A Festive High Voltage Load

Rich,

Nice seasonal touch to your avatar image!

Here's a copy of the image for those who might find this message after the holidays.

Rich Avatar.gif
Rich Avatar.gif (2.46 KiB) Viewed 124 times
by Rex Allers
Sat Dec 23, 2017 10:26 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Criticize my HV supply design
Replies: 26
Views: 883

Re: Criticize my HV supply design

Note that the tolerance printed on my resistors is 10% and I measured the 5 200 M in parallel (should = 40 M) at 38 M. So I suggest you have a pot on the low resistance leg of the divider to calibrate the division ratio.
by Rex Allers
Sat Dec 23, 2017 11:04 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Criticize my HV supply design
Replies: 26
Views: 883

Re: Criticize my HV supply design

A little bit more on those Russian resistors. I forgot to mention that the length on the ones I have is not real consistent. If you look at the thin bar in the picture I posted earlier, it's a little wavy and there is a bit of a gap between the end of one and the bar. Per Richard's question, I looke...
by Rex Allers
Fri Dec 22, 2017 10:06 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Criticize my HV supply design
Replies: 26
Views: 883

Re: Criticize my HV supply design

Are those resistors from Russia? I bought some that look like that a good while back from a Russian seller. Mine are all 200 Mohm. If they are like the ones I got, they have a threaded screw projecting from one end and a threaded hole in the other, so you can screw them together end to end. If it he...