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My original research of 20 years. (c) 2022 George Dowell, Viscom Inc., GEOelectronics@... Have fun Geo

It likes running with the smallest Eberline air/vacuum pump. It doesn't need a real "vacuum" to operate, just airflow. Naturally the filter/sensor arrangement is set up to drawn in air locally, so a small "vacuum" pump is employed. to accomplish this. Large color Touchscreen has buttons that bring up the different pages of reports on the present scan while the LOG button shows historical data and charts. Main buttons on the right are agile, you press what it says and get what it says, it will change what it says for the next screen. I just push it once and look at what comes up then push it again sees what comes up next. All the right hand buttons seem to do this. I was looking for the Radon scree and found it this way. Picture dump is are camera shots of some of the various screens.

Greetings and thanks in advance, I'm very happy to have been directed here -- warmest regards. Further below, I introduce myself and give a back story leading to here, but in case you're in a hurry to answer my main question I'll put it first. Question: I see GeoElectronics mod pictures with a CD V-700 GM counter utilizing a pancake probe, and I've even seen a rare, yellow probe on a Civid Defense unit that looked like a Ludlum 44-9. My main question is related to the fact that, in terms of CPM, the gauge on the unit is marked with a maximum of around 30,000 CPM or so on a scale setting of 100x. A pancake probe is easily going to want to count well into the 50's or 60's of thousands CPM with about a third of the rocks I'd like to share with others. So, if I use a CD V-700 with a pancake probe, will I simply have to settle for the unit pegging at 30,000 CPM or 50mR/hr (thus unable to measure a rock with 60,000 CPM) or can I modify and calibrate the unit to read higher? Perhaps calibrate the unit to a re-labeled needle gauge up to 120 CPM? Or maybe even just add a zero to each scale? Thanks for helping me get my bearings, and I'm so glad to have found out about the splash Mr. Dowell and associates have made in the world so that these fun surplus units may be so rewarding, versatile and useful. More about me and other unecessary details leading here: I'm Jeff from Florida, radio call sign W4VEY. I admit that's a vanity tag for now; I need to return for my General ticket or more. I jumped on that call while it was still available, since it looks like “wavey” as in little, wavy electromagnetic lines. I became interested in the possibility of upgrading my standard-issue beta/gamma hot dog probe that came on my refurbished Lionel CD V-700 Geiger-Müeller counter. I also have a Victoreen 493 with the thin mica end-window probe, which I've been enjoying, but I'd like to have a pancake on one or the other (maybe an SI-8B if not an LND) so I can take similar readings on rocks I share with others who often have a Ludlum 44-9 or similar probe. Besides being low on high budget funds, it's kind of scary when you see a Ludlum 44-9 for $150 because even if it's not broken it could be contaminated etc., so I like the idea of I started seeing lots of very cool things from GeoElectronics but was not sure where any centralized plans and knowledge repository was for Geo-mods so I asked a question to GeoElectronics on Ebay who kindly referred me here. I'm assuming that was Mr. Geoge Dowell; thanks to him. I assumed here was were to post, since another group is an archive (actually I just noticed a specific LENi group, too). I was going to scan the historical archives first, to not ask FAQ's, but I'm getting 404 not found errors from qsl.net via any of the links. If there are any downloads or materials I should access or download and absorb, I'm eager to do so as not to be the boring and repetetive noob. Thanks again!. Jeff Burris w4vey Odessa (outskirts of Tampa), FL