Hi Charlie, I'm already using output feedback for regulation in my design, although not the packaged resistor divider. I need to see if they are still...
FYI: If you have an order in for anything, it either has shipped or is ready to ship. Now I have space to work on those LENi's again, which should be caught up...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the GeigerCounterEnthusiasts group. File...
GeigerCounterEnthusia...
Jun 3, 2005 12:52 am
3883
I have a ludlum scintillator probe, but the PMT seems very noisy - I have removed the crystal from both a 44-2 scint and a 44-3 scint in order to set the...
So far as I have been able to determine, once a PMT, or any vacuum tube, gets noisy, it just gets worse. You have ruled out a noisy power supply, as the...
... Thanks. That helps. I took apart some more probes, the list of PMTs so far: Ludlum 44-3: Hamamatsu 6199 Ludlum 44-2: Thorn 9902KB (the problem probe) ...
Hi Justin, One other point is that a tube can take a long time (up to several hours) to recover from being exposed to light. You should allways handle PMT's in...
Using BNC connectors at high voltages. I've been looking into the practical issues of using standard BNC type connectors on nucleonic equipment. My equipment...
Very nice summary of a lot of important specs, Robert. Thanks. I might mention that relative humidity can have an effect on leakage current across any...
... My assumption is that this is only the case if the tube was powered when the exposure occurred. If I'm mistaken on that, please let me know! :) (I unplug...
Just exposing the PMT to light will affect the dark current. Daylight and fluorescent light are worse than incandescent. Sometimes the PMT will require as...
... Ah. Thanks. Damn, this means it would take days to do proper testing. Not sure I have the time/patience for that right now. I s'pose a start will be ...
I have been experimenting with the ultimate pulser circuit. I can generate pulses from 10Khz, to once in a blue moon. I can make them as narrow as 10uS, or...
You have to take away the comma at the end of com for the link to work. Phil ... them ... I ... randomly. ... on ... company, ... put ... keyer ... interface....
Hi every one seeing that I have never see plastic scintillation plastic before could some one email me a pic of raw plastic and finished ? The reason I ask is...
That stamp module is so much more capable than anything I've been messing with. I wish I understood all I knew about it or how to program it. I'm looking the...
Hi, has anyone ever used or owned one of these Geiger Counters before? (The DOM-410 that is.) I would like to know your thoughts on this instrument, good and...
Good Points: a.. Broad Range 1 CPS to 1,000 REM/Hr, b.. Very sensitive (Background 1 CPS/ 60 CPM) Will detect Fiesta ware 4-6 feet away!, c.. Durable...
... before? (The DOM-410 that is.) ... bad points. ... productid=1632&cat=89&page=1 ... appreciated. ... It's an interesting counter. I helped Ben with...
I added a text document to the CCFL file that discusses the concept, overview and other technical stuff about my design. Check the end of the document for a...
... before? (The DOM-410 that is.) ... bad points. ... productid=1632&cat=89&page=1 ... appreciated. ... Just an update. The one's that Ben is selling had the...
Most of the major isotopes do come in a liquid form, as a matter of fact that's how the solid-sealed sources are made-from a liquid/ but I don't know of...
Check out out Canberra's website out of I think Connecticut. They have liquid sources however I think they are sealed in a test tube. Thanks, Seth ... ...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the GeigerCounterEnthusiasts group. File...
GeigerCounterEnthusia...
Jun 5, 2005 1:37 am
3919
Everything is now posted about the design of my CCFL module based regulated DC high voltage power supply. Cheap and relatively simple. Let me know about the...
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