Search found 79 matches

by Cai Arcos
Wed Feb 10, 2021 8:50 am
Forum: Vacuum Technology (& FAQs)
Topic: Help me in my baby steps in the vacuum world.
Replies: 11
Views: 1073

Re: Help me in my baby steps in the vacuum world.

Richard, John: The oil was a little bit over the half mark in the viewer. I still turned it on because it rotated freely when turned by hand. Regarding the manual, or who made it: I have no idea!! The only specification is a little placard that I attach below. I've spend quite some time searching fo...
by Cai Arcos
Tue Feb 09, 2021 3:14 pm
Forum: Vacuum Technology (& FAQs)
Topic: Help me in my baby steps in the vacuum world.
Replies: 11
Views: 1073

Re: Help me in my baby steps in the vacuum world.

Today I was able to extract the oil from the pump. I attach a photo.
As you can see, the oil is very dirty and is probably the reason the vacuum was so poor. Luckily, there are no metal chips or fragments.
As soon as I can I will purchase new oil and do new test runs.
by Cai Arcos
Sat Feb 06, 2021 6:38 pm
Forum: Vacuum Technology (& FAQs)
Topic: Help me in my baby steps in the vacuum world.
Replies: 11
Views: 1073

Re: Help me in my baby steps in the vacuum world.

Maciek: Thank you very much for your reply! Can really any tipe of industrial oil work? Is it "that easy" for a first try with a roughing pump? For example, would this oil from Amazon https://www.amazon.com/Octopus-Aceite-Bomba-compresor-m%C3%A1quinas/dp/B07QBPGZ54/ref=sr_1_5?dchild=1&keywords=aceit...
by Cai Arcos
Sat Feb 06, 2021 8:16 am
Forum: Vacuum Technology (& FAQs)
Topic: Help me in my baby steps in the vacuum world.
Replies: 11
Views: 1073

Re: Help me in my baby steps in the vacuum world.

Richard: I understood that some type of special oil would be needed, but what is most often recommended is to use the one recommended by the manufacturer, which I don't know. Is there any generic brand I could use? Regarding soap: this was an idea that had a friend of mine who works semi regularly i...
by Cai Arcos
Fri Feb 05, 2021 3:18 pm
Forum: Vacuum Technology (& FAQs)
Topic: Help me in my baby steps in the vacuum world.
Replies: 11
Views: 1073

Help me in my baby steps in the vacuum world.

Hello: I've recently started my journey into the vacuum world. Having absolutely no experience whatsoever, my first step was to fully digest the FAQs, read some literature and then to buy a tested MKS901p gauge. A friend of mine who makes neon lights for a living kindly gifted me an old vacuum pump ...
by Cai Arcos
Sun Jan 31, 2021 1:30 pm
Forum: Vacuum Technology (& FAQs)
Topic: DIY Penning gauge controller?
Replies: 6
Views: 609

Re: DIY Penning gauge controller?

In a spanish forum, they constructed a Penning Gauge from zero. They used a CCFL inverter and measured the current from the low side of the transformer to the ground of the primary, in order to avoid arcing and safety issues. As Richard stated, calibration is a problem which is pretty much impossibl...
by Cai Arcos
Sun Jan 31, 2021 1:25 pm
Forum: Vacuum Technology (& FAQs)
Topic: LCD Vacuum Sensor
Replies: 19
Views: 4130

Re: LCD Vacuum Sensor

Thanks for letting me know about the physics circuits on the 2nd edition, I have only read the 3rd and I am quite surprised by the amount of content that was removed...
by Cai Arcos
Sat Jan 30, 2021 9:05 am
Forum: Vacuum Technology (& FAQs)
Topic: LCD Vacuum Sensor
Replies: 19
Views: 4130

Re: LCD Vacuum Sensor

Is that the Art of Electronics peeking in the corner of the photograph? Great project too, a really convenient way to measure vacuum! By the way, have you considered optical isolation or, more simply, just using a usb isolator if you ever connect this to a PC? I feel it would be an easy way to prote...
by Cai Arcos
Sat Dec 12, 2020 9:04 am
Forum: Images du Jour
Topic: Progress on my first fusor project
Replies: 18
Views: 1746

Re: Progress on my first fusor project

A basic vacuum system and gas management system can also be used to make gaseous radiation detectors. With a pump that could reach about 10 microns you should be able to avoid the worse effects of electron attachment created by oxygen residue. Backfill this with a P10 mixture (commonly available) th...
by Cai Arcos
Fri Dec 11, 2020 8:54 am
Forum: Interesting Links
Topic: Selected Topics in Nuclear Electronics
Replies: 3
Views: 2574

Re: Selected Topics in Nuclear Electronics

I feel that the concepts I have to physically get working always stucks with me (while the things that I'm supposed to memorize at class don't really!). It really was a different a time. I think now repairing the various modules like you did back in the 70s would be unthinkable in most cases, due to...