Search found 282 matches

by Roberto Ferrari
Thu Dec 28, 2017 11:31 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Matsusada Power Supply Cable
Replies: 12
Views: 398

Re: Matsusada Power Supply Cable

Am I wrong or the posted specs (highlighted item) has the wrong polarity?
by Roberto Ferrari
Tue Dec 19, 2017 8:53 pm
Forum: New User Chat Area
Topic: Pfeiffer Duo 2.5 Question
Replies: 13
Views: 481

Re: Pfeiffer Duo 2.5 Question

Samuel
I assumed that when you said "The 3rd kf16 port does indeed lead directly into the inside of the pump " you meant it goes to the oil reservoir.
As Jerry inquired, the other two ports need to be open, mainly the gas discharge.
by Roberto Ferrari
Sun Dec 10, 2017 11:10 pm
Forum: New User Chat Area
Topic: Pfeiffer Duo 2.5 Question
Replies: 13
Views: 481

Re: Pfeiffer Duo 2.5 Question

Hi Samuel

You can just cap off that port or use it in combination with the exhaustion port in order to return the small quantity of oil that comes out as a mist when gas flow is high.
by Roberto Ferrari
Tue Nov 28, 2017 12:20 pm
Forum: New User Chat Area
Topic: Oil Diffusion Pump Questions
Replies: 10
Views: 464

Re: Oil Diffusion Pump Questions

Hi Dennis

As there was no information about voltage and wattage, I suggested to take it out in order to check if it has the specs engraved on it.
Of course, any violence during extraction could impair its normal function.
by Roberto Ferrari
Tue Nov 28, 2017 1:41 am
Forum: New User Chat Area
Topic: Oil Diffusion Pump Questions
Replies: 10
Views: 464

Re: Oil Diffusion Pump Questions

Thanks for the explanation.
Xmas tree looks ok.
Try heating and cooling the device in order to detach the heater cartridge from the body.
by Roberto Ferrari
Mon Nov 27, 2017 1:55 am
Forum: New User Chat Area
Topic: Oil Diffusion Pump Questions
Replies: 10
Views: 464

Re: Oil Diffusion Pump Questions

Hi Luke
I am used, after 40 years, to see many different diffusion pump designs but yours is really weird…
Please, comment about those three wide pipe loops and publish a picture of the Xmas tree.
Many heater cartridges have engraved voltage and wattage. Are you able to take it out?
Roberto
by Roberto Ferrari
Sat Nov 11, 2017 12:51 am
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: HV thyratrons and fusion
Replies: 3
Views: 300

Re: HV thyratrons and fusion

Hi Richard I am aware of the pulsed mode of operation but estimated that the average power involved was higher than the 500 W of a typical fusor. About the loaded target I assumed that nickel is a typical support/cage for filaments, good enough to store deuterium during tests and operation life time...
by Roberto Ferrari
Fri Nov 10, 2017 10:22 pm
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: HV thyratrons and fusion
Replies: 3
Views: 300

HV thyratrons and fusion

Hi, Thinking about John Myers' recent post,I had a slightly mad idea. The HY-3202 thyratron is loaded with deuterium and the inner pressure is around 15-30 mtorr (as per WiKi), not too far from fusors. So, working at 30 kV may do some fusion… All needed to check this is to monitor neutrons close to ...
by Roberto Ferrari
Thu Nov 09, 2017 2:42 pm
Forum: Images du Jour
Topic: Say hello to my little (HV) friends
Replies: 24
Views: 1066

Re: Say hello to my little (HV) friends

John

A crack in any of the ceramic-metal seals would impair the hermeticity.
by Roberto Ferrari
Thu Nov 09, 2017 12:40 am
Forum: Images du Jour
Topic: Say hello to my little (HV) friends
Replies: 24
Views: 1066

Re: Say hello to my little (HV) friends

Am I wrong or that thyratron has a bent pin?