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franco
Panama
4 Posts |
 Posted - 08/19/2011 : 12:09:06
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| Hi. I just got the kit with an SI-3BG tube. I fired it up and the thing is beeping like crazy. I Have the anode and cathode polarity right so I really hope my home isn't this radioactive. Any ideas? The voltage measured at the tube with the tube disconnected is about 178vdc. I haven't touched the potentiometer. |
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| Reply #1
Odiez1
73 Posts |
Posted - 08/19/2011 : 13:51:11
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My "free" GM tube did the same thing. Didn't respond to a source either, just clicked away without reason.. It went faster as the voltage was turned up, and slower as it went down. Figured the "freeby" was no good.. :(
The kit works well with the 6107 and 6108 tubes I have. |
-Odie |
Edited by - Odiez1 on 09/23/2011 09:27:17 |
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| Reply #2
atomic.dave
USA
65 Posts |
Posted - 08/19/2011 : 14:20:17
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| Hey Odiez... you wanna sell one of your 6107s? Its the same as the 7616 LND, right? and did you have any problems with the higher voltage requirement? |
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| Reply #3
Odiez1
73 Posts |
Posted - 08/19/2011 : 15:26:10
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quote:
Originally posted by atomic.dave
Hey Odiez... you wanna sell one of your 6107s? Its the same as the 7616 LND, right? and did you have any problems with the higher voltage requirement?
I only have 1 of them, got if off ebay, [correction]and I thought the seller still had more.[/correction] I don't even know if it still works after my incident the other day... At any rate.. I do have 3-pin mini sockets for the CDV-700 probes/ GM tubes.
The 6107 is supposed to be Alpha sensitive, with the proper mod mentioned in another topic. It does look like the 7616, but I don't see Alpha sensitivity mentioned for the 7616. I'm looking at getting an SBM-20 (the most widely used GM tube, SOEKS, PRIPYAT for example). I think it's a bit more sensitive and may be more useful as a personal meter than the 6107, as it's not an end window tube...
As far as voltage, I believe most tubes can operate at lower than specification voltages. The GMC-080 I goes up to 520v, which seems sufficient for the GM tubes I'm seeing on ebay. The prices are another matter.. |
-Odie |
Edited by - Odiez1 on 08/19/2011 16:08:52 |
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| Reply #4
ZLM
1261 Posts |
Posted - 08/20/2011 : 19:28:24
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franco: Adjust voltage will change the sensitivity of the tube. The 178vdc is not a correct voltage. Do not check the voltage on the tube two ends. the correct test points are showing in the topic. Also, use a batter multimeter, you will get lower voltage if your multi-meter has low resistance.:
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| Reply #5
ENIGMA6
USA
15 Posts |
Posted - 08/21/2011 : 10:20:06
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| I purchased one of the new full length glass tubes from GQ and have found it to be much more sensative than the BG-29 Russian tubes. I haven't played with the 6107 alpha window tube so I can't speak to it's sensativity compaired to the new GQ glass tube. Ted |
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| Reply #6
ZLM
1261 Posts |
Posted - 08/21/2011 : 11:14:54
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| ENIGMA6: The new GQ Full leng glass tube should be M4011 and the Russian tube should be SI-29BG right? |
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| Reply #7
atomic.dave
USA
65 Posts |
Posted - 08/21/2011 : 16:50:03
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How do you think it would compare to a Russian CI-180G? ebay has them for 17.00 bucks right now.
Recommended Working Voltage 360 - 420V
Initial Voltage 290 - 330V
Plateau Length 100V
Plateau Slope 0.1% / 1V
Interelectrode Capacitance 10pF
Load Resistance 5 - 10 MOhms
Working Temperature Range -50º +70º #1057;
Length 100mm
Diameter 18mm
quote:
Originally posted by ENIGMA6
I purchased one of the new full length glass tubes from GQ and have found it to be much more sensative than the BG-29 Russian tubes. I haven't played with the 6107 alpha window tube so I can't speak to it's sensativity compaired to the new GQ glass tube. Ted
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| Reply #8
ZLM
1261 Posts |
Posted - 08/24/2011 : 15:13:05
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| There is no sensitivity spec. in those data. |
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| Reply #9
ENIGMA6
USA
15 Posts |
Posted - 09/23/2011 : 07:00:00
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| Sorry for the delay in replying. Yes, it is the SI-29BG. |
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too many counts
