Search found 132 matches

by myID
Tue Nov 10, 2009 4:52 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Static Master safe?
Replies: 4
Views: 1926

Static Master safe?

<t>Dear all-<br/> <br/> i could not resist to buy some history: 1" static master brush. <br/> The box and the manual are really nice <br/> I guess it still might work as a test source even though it had many many halftimes already...<br/> Inside the Small cage the element looks somewhat corroded.<br...
by myID
Sat Nov 07, 2009 7:32 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: new supply: Bridge with BIG IGBTS
Replies: 31
Views: 13592

Re: why does my driver get hot

Hi-
it is the non-inverting One getting hot.
Thanks anyways!
Roman
by myID
Sat Nov 07, 2009 6:35 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: new supply: Bridge with BIG IGBTS
Replies: 31
Views: 13592

why does my driver get hot

<t>Hello-<br/> <br/> Today I tested my driver (see circuit diagram from 27.10)<br/> Layout is OK I guess- additional Vdd decoupling is done directly underneath the driver chips with high quality caps.<br/> Suboptimal: output connections to GDT are somewhat long...<br/> <br/> To test I connected Vdd ...
by myID
Tue Nov 03, 2009 9:46 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Newbies FYI: Alpha detector
Replies: 0
Views: 1418

Newbies FYI: Alpha detector

<t>Hello-<br/> <br/> this only might be interesting for the newbies.<br/> Finally I built a housing for my Russian pancake alpha detector. <br/> I simply used an aluminum casing, mounted a BNC plug, made a big hole below the detector (hole is 8cm^2, window area is 15cm^2 so I almost loose 50% of act...
by myID
Tue Nov 03, 2009 9:30 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Glassmann Multiplier PS/EX040P025 parts + help needed (40kV 25mA positive)
Replies: 6
Views: 4143

Glassmann Multiplier PS/EX040P025 parts + help needed (40kV 25mA positive)

<t>Hi-<br/> <br/> I bought a Glassmann Multiplier at Ebay. <br/> I hoped the driver Xfmrs would also be in there but they are not ;-(<br/> I am looking for driver Xfrms and all manuals I can get.<br/> What input Voltage will it need at what frequency?<br/> Any help on this is welcome!<br/> I attache...
by myID
Wed Oct 28, 2009 9:29 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: new supply: Bridge with BIG IGBTS
Replies: 31
Views: 13592

Re: new supply: Bridge with BIG IGBTS

Hi Chris-

the cables are like new- and relatively thin and flexible for xray cables (I have much stiffer, thicker ones, too but I do not like them).
They are just a little dirty (better: were because I cleaned them).

Greets
by myID
Wed Oct 28, 2009 4:13 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: new supply: Bridge with BIG IGBTS
Replies: 31
Views: 13592

Re: new supply: Bridge with BIG IGBTS

<t>Hi-<br/> <br/> I already have my HV xfmr and stack- I have two different ones from HF xray supplys which I planned to use. The only thing I know is that they are supposed to work with a frequency of 20 - 30 kHz...<br/> Further more the idea is to keep the logic/ driver/ bridge as flexible as poss...
by myID
Tue Oct 27, 2009 7:50 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Pancake- works as NOT specified
Replies: 4
Views: 1665

Pancake- works as NOT specified

<t>Hi-<br/> <br/> my pancake tube should have a bias voltage of 400V. <br/> My ESP 2 has a minimum output voltage of 500V. <br/> To not kill the tube I simply built a voltage divider from 2 10Meg resistors and connected the tube parallel to one of them. I adjusted the bias voltage to 800V and it wor...
by myID
Tue Oct 27, 2009 7:18 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Eberline ESP 2 manual WITH figures needed
Replies: 0
Views: 1745

Eberline ESP 2 manual WITH figures needed

Dear all-

for some reason I deleted the manual I had with he figures in it. I still have a manual- but without the figures- not good.
Can somebody please help me out?

Thnaks
Roman
by myID
Tue Oct 27, 2009 7:04 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: new supply: Bridge with BIG IGBTS
Replies: 31
Views: 13592

Re: new supply: Bridge with BIG IGBTS

<t>Hi Chris-<br/> <br/> I know the IGBTs are slow and over the top- but they were available and I guess they are also robust- this is why I choose them...<br/> <br/> Before I was using IGHX 40 N 60 all 4 driven by a pair of tcc 4420/4429 (they are not capable to drive the big IGBTs) and had fat arcs...