Search found 321 matches

by Rex Allers
Tue May 12, 2015 10:12 am
Forum: Vacuum Technology (& FAQs)
Topic: TG-550 TC vac gauge tube
Replies: 9
Views: 5144

Re: TG-550 TC vac gauge tube

Thanks for the replies. I do have a copy of a Bell Jar article that gives some details on DV-6M, 531 and 6343. Good info and helpful overview. I also have a Teledyne Hastings table that gives pins, heater current and general parameters for 7 of their tubes. Maybe the phone calls are a good idea. In ...
by Rex Allers
Mon May 11, 2015 6:21 am
Forum: Vacuum Technology (& FAQs)
Topic: TG-550 TC vac gauge tube
Replies: 9
Views: 5144

TG-550 TC vac gauge tube

I recently acquired a bunch of surplus parts. Among them is a vacuum thermocouple tube, Anelva TG-550. This stuff is probably circa 1990. I looked for data and found this page with just basic info for the current TG-550C version: https://www.canon-anelva.co.jp/english/products/component/vacuum/vac_d...
by Rex Allers
Thu Aug 07, 2014 10:39 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Bremsstrahlung Radiation Detection
Replies: 16
Views: 6186

Re: Bremsstrahlung Radiation Detection

For a cheap but effective MCA, here's a link to to a popular Italian project. http://www.theremino.com/downloads/radioactivity I haven't used it myself but have seen others' good results posted. It is based on getting the signal input through a decent sound card. The software is free for download. I...
by Rex Allers
Sun Jul 06, 2014 6:23 pm
Forum: Vacuum Technology (& FAQs)
Topic: Edwards E2M12 trash or rebuild
Replies: 9
Views: 3746

Re: Edwards E2M12 trash or rebuild

Richard,
Thanks for the positive words about the Yellow Jackets. That's good encouragement to use the one I have.

Dennis,
I guess I was hoping someone would have some magic to try. I'm going to see if I can cancel the purchase and return the Edwards pump. It's definitely not worth the money I paid.
by Rex Allers
Sat Jul 05, 2014 11:16 am
Forum: Vacuum Technology (& FAQs)
Topic: Edwards E2M12 trash or rebuild
Replies: 9
Views: 3746

Re: Edwards E2M12 trash or rebuild

The refrigeration pump was a used eBay purchase. It's a Yellow Jacket 6 CFM and shows external signs that it was used a while. That was a decent buy. Working pretty good now but I'm not sure how it will hold up if I run it many hours continuous. I've heard these types of pumps wear out pretty fast a...
by Rex Allers
Fri Jul 04, 2014 11:41 pm
Forum: Vacuum Technology (& FAQs)
Topic: Edwards E2M12 trash or rebuild
Replies: 9
Views: 3746

Edwards E2M12 trash or rebuild

My luck at buying pumps is bad. Wanted a decent backing pump and found a E2M12 locally. Seller said, "Like new vacuum pump in good working order." When I picked it up I noticed some brown residue in the exhaust port. Seller seems like a decent guy. I asked him how it had been used and he said for va...
by Rex Allers
Thu Feb 06, 2014 9:46 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: HV Cable DS2124
Replies: 5
Views: 3390

Re: HV Cable DS2124

Thanks, Richard. Just the sort of info I was looking for. Good to know it will be a FAQ.
by Rex Allers
Thu Feb 06, 2014 1:19 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: HV Cable DS2124
Replies: 5
Views: 3390

HV Cable DS2124

Looking at a catalog from an HV supply manufacturer, they seem to change output cables from RG-8 to DS2124 at about 75 or more KV. I did a search here for 2124 but didn't find any hits. I found one link in my web searches on the mfg site with a some info about DS2124. Seems DS = Dielectric Sciences....
by Rex Allers
Sat Nov 02, 2013 1:37 am
Forum: Vacuum Technology (& FAQs)
Topic: Fyrquel oil
Replies: 1
Views: 1316

Fyrquel oil

This is a question about an odd pump oil. I just picked up a Precision Scientific D150. This is similar to a Welch 1402. Richard Hull has posted that he uses one. It looked pretty clean, but had a hose coupling where the sight glass usually is. When I got it home I noticed a label that says, "CAUTIO...
by Rex Allers
Mon Dec 31, 2012 4:32 am
Forum: Vacuum Technology (& FAQs)
Topic: D8A pump rebuild advice
Replies: 4
Views: 2093

Re: D8A pump rebuild advice

<r>Thanks for the information, Rich. It gives me more hope. Sounds like your pump and mine were similarly abused. I have not figured out what all the crap in mine is but it isn't rust and doesn't seem very sticky/gluey. I think maybe dish soap and a tooth brush might be enough to clean it. Sure is a...