Search found 318 matches

by Rex Allers
Tue Oct 06, 2020 4:39 am
Forum: Images du Jour
Topic: Richard's argon wall
Replies: 1
Views: 329

Richard's argon wall

HEAS 2020 looks really great from all the excellent shared pics. One of Frank's pics shows Richard's argon wall. From the pic, I assume this is mainly for entertainment. Looks fascinating. Similar to a flattened plasma ball? Richard, for those of us who didn't make it to HEAS 2020, can you describe ...
by Rex Allers
Mon Sep 07, 2020 11:01 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: 50kV Supply
Replies: 40
Views: 23355

Re: 50kV Supply

Nicolas, Per your, "opening up my Glassman 50KV supply." I'm not sure what that means. What exactly do you have? The aluminum box that Joe tipped us off to is part of a rearranged custom design based on a Glassman ER50N6 0-50kV 0-6mA supply. That aluminum box has the high frequency transformer and a...
by Rex Allers
Thu Sep 03, 2020 8:08 am
Forum: Items wanted
Topic: Looking for a cheap dual stage vacuum pump
Replies: 3
Views: 476

Re: Looking for a cheap dual stage vacuum pump

Cade, Don't know if it will help, but I suggest you edit your profile and add a Location to your info. Doesn't have to be precise but, like mine, your city might help a lot. Shipping for large heavy things like a vacuum pump is a PITA. Just maybe you'd get a response from someone if they knew it was...
by Rex Allers
Sat Jul 18, 2020 3:00 pm
Forum: Images du Jour
Topic: Comet NEOWISE
Replies: 13
Views: 1651

Re: Comet NEOWISE

Yes. Checked it out last two nights. Best I've seen since the two big ones in mid 90's. Shared it with a couple of neighbors. Tried to check it out a week or so back in pre-dawn but no luck. Thursday night tried again but this time in early night just after skies darkening, around 9:30 PM. Success w...
by Rex Allers
Tue May 19, 2020 2:55 pm
Forum: Announcements and Site Administration Topics
Topic: Edit posts
Replies: 16
Views: 2410

Re: Edit posts

Frank, I just found one of my old posts that has the inline attachment issue. Filename is there and opens the image if clicked on but the thumbnail doesn't show in the message. This one: Re: MKS 901p by Rex Allers » Fri Jun 08, 2018 9:06 pm https://fusor.net/board/viewtopic.php?f=10&t=11533&p=80133#...
by Rex Allers
Tue May 19, 2020 2:10 pm
Forum: Announcements and Site Administration Topics
Topic: Edit posts
Replies: 16
Views: 2410

Re: Edit posts

Frank said, "The photos of those with the ID numbers starting with a 4 are gone according to Rex." Not quite right, I wish it was just 4. It is 4 or greater. From what I see in posts, the users who lost all their uploaded files in the move are users who's ID number begins with the number 4 or more (...
by Rex Allers
Sat May 16, 2020 12:50 am
Forum: Announcements and Site Administration Topics
Topic: Edit posts
Replies: 16
Views: 2410

Re: Edit posts

Tyler, Good work. Thanks. Frank, Re: "Let see the others in the thread can do theirs too. Rex, Rich and Rich?" I assume by that you mean me, Rich Feldman, and Rich Normand. None of us three are suffering from the post-move global attachment loss syndrome. But there's another weird glitch that happen...
by Rex Allers
Sat May 09, 2020 3:36 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Ludlum model 3 issues
Replies: 12
Views: 1741

Re: Ludlum model 3 issues

Sarmad, None of that explanation makes any sense to me. There's no 64W pot in a Ludlum 3. The batteries probably couldn't supply 64W if they were shorted. The little pot for HV adjust setting is probably 100K ohm. In the circuit it should draw microamps and micro watts. Not sure how you were measuri...
by Rex Allers
Fri May 08, 2020 12:05 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Ludlum model 3 issues
Replies: 12
Views: 1741

Re: Ludlum model 3 issues

Did you find something that made it start working? Does it go beyond 750 V?
by Rex Allers
Thu May 07, 2020 2:10 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Ludlum model 3 issues
Replies: 12
Views: 1741

Re: Ludlum model 3 issues

Sarmad, I spent a bit of time today trying to understand the Model 3 circuits. It seems that the Mod 3 manual on the Ludlum page I linked earlier has schematics and board layouts that don't match yours. I assume the doc is for a newer version. One significant difference is the shape of the board tha...