Search found 24 matches

by Tyler Meagher
Fri May 15, 2020 2:09 am
Forum: Announcements and Site Administration Topics
Topic: Edit posts
Replies: 16
Views: 1102

Re: Edit posts

Thank you. I finished fixing all my pictures. Several people who posted in my vacuum pump rebuild thread also having missing photos, but I fixed what I could.

Tyler
by Tyler Meagher
Wed May 13, 2020 6:15 pm
Forum: Announcements and Site Administration Topics
Topic: Edit posts
Replies: 16
Views: 1102

Edit posts

Hi,

Is there a way I can edit my old posts so I can try to fix all my pictures? It seems most of my pictures were lost when the site moved.

Tyler
by Tyler Meagher
Sun Mar 24, 2019 9:10 pm
Forum: Images du Jour
Topic: Tyler's Demo Fusor
Replies: 7
Views: 3936

Re: Tyler's Demo Fusor

You are right. My demo fusor does not have a standard outer grid or a grounded metal shell. I have a top metal plate connected to ground. I get a poissor in the middle of the grid and a jet out one side when the pressure is low enough. I do not understand how it works. I am going to put a metal band...
by Tyler Meagher
Fri Mar 22, 2019 7:19 pm
Forum: Images du Jour
Topic: Tyler's Demo Fusor
Replies: 7
Views: 3936

Re: Tyler's Demo Fusor

I ran the experiment Rich recommended with a high voltage diode. The pictures below show the demo fusor in three different configurations. 1) No diode. 2) Diode arrow pointing away from the transformer. 3) Diode arrow pointing to the transformer. The oscilloscope traces are the high voltage output a...
by Tyler Meagher
Fri Feb 08, 2019 2:53 am
Forum: Images du Jour
Topic: Tyler's Demo Fusor
Replies: 7
Views: 3936

Re: Tyler's Demo Fusor

Rich and Dennis, thank you for your comments. I do wear safety glasses when working in the shop and lab. I have a procedure I follow when I operate my demo fusor’s power supply. After each run the variac is set to zero, I turn off the power strip, and then I unplug the variac. The variac is always u...
by Tyler Meagher
Wed Feb 06, 2019 3:23 am
Forum: Images du Jour
Topic: Tyler's Demo Fusor
Replies: 7
Views: 3936

Tyler's Demo Fusor

I built a small demo fusor using my rebuilt Pfeiffer Duo 1.5A vacuum pump, a pickle jar, vacuum bagging sealant (tape), a spark plug, a variac, a microwave oven transformer, and a 20K ohm ballast resistor. I put the pickle jar vacuum chamber in a clear plastic trashcan for safety. Below are some pic...
by Tyler Meagher
Mon Jun 04, 2018 3:58 am
Forum: Images du Jour
Topic: Gold Plasma
Replies: 7
Views: 3595

Gold Plasma

I wanted to make some plasma with my vacuum pump. I used the magical gold plasma machine. I put a silver coin into the plasma and it turned gold. Sometime later I’ll figure out how it works.

Tyler
by Tyler Meagher
Sun Jun 03, 2018 1:55 am
Forum: Vacuum Technology (& FAQs)
Topic: Vacuum pump rebuild
Replies: 53
Views: 23900

Re: Vacuum pump rebuild

My pump worked great! The pressure was below 1 millitorr on my MKS gauge after an overnight run. The experiment I just finished running was to learn about something called vapor pressure. My experiment was to replace the VacOil 20 with cheap oil from Amazon. The vacuum oil you use for air conditione...
by Tyler Meagher
Wed May 30, 2018 12:55 am
Forum: Vacuum Technology (& FAQs)
Topic: Vacuum pump rebuild
Replies: 53
Views: 23900

Re: Vacuum pump rebuild

The first picture is a pump down curve of my vacuum pump. It was taken at the inlet of the pump. There was just the tee and the MKS 901p gauge. It does not take long to get below 10 millitorr. Then my dad had me change the oil with some cheap Amazon oil as an experiment. This is the same oil Samuel ...
by Tyler Meagher
Wed May 23, 2018 2:59 pm
Forum: Vacuum Technology (& FAQs)
Topic: Vacuum pump rebuild
Replies: 53
Views: 23900

Re: Vacuum pump rebuild

I tried the metal exhaust valve again. It worked fine. No weird behavior. I then put the spring and rubber exhaust valve back in. It worked the same. Draining the oil and removing the case two times didn’t take too long. I was wrong when I said the metal exhaust valve was causing the weird behavior....