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So these are the drones you are looking for. Less than a Cat3 amount. Cat4 if the enclosure is still intact. Used to calibrate PET/CT scanners https://www.thegatewaypundit.com/2024/12/u-s-nuclear-regulatory-commission-releases-report-confirming/ https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2024/20241212en.html#en57455

Dear Group Members, I haven't seen any activity on the groups (GeigerCounters, CDV700CLUB, and GammaSpectroscopy) since late September and mid October. What's going on? Thanks. ~Cliff

I know this is a long shot, but I am looking for the gun handle for an ADM300. Does anyone have one that they would sell? Thanks for looking. Lenox

Dear Gary, Very interesting. Thank you. ~Cliff On 11/6/2024 9:42 AM, mckennagm via groups.io wrote:

Where do you live, Meeps? In the US? send me a PM. I have a hotmail account, too. "davidnix71" On 9/13/2024 12:41 PM, Group Notification wrote:

You could try the output of a cheap hand held bug zapper. Buy one the uses 2 AA batteries. The output has to be limited by the manufacturer for human safety. CDV700s use less than 5 micro amps of current. You need a capacitor to smooth the pulses from the zapper and probably some zener diodes turned backwards to drop the voltage to around 900vdc. You need to limit the voltage on an ENI anyway. https://www.ebay.com/itm/285622332995 $14 from a US seller. This is a ready made circuit that will replace the entire tube driving circuit on any CDV. Up to 1000vdc out from 3 to 5 volts in. More than 10 available.

I think I need a new transformer but cant find one can I get a model number for a replacement please?

Moving to a smaller house, already got rid of my Lionel CD V700 and I am not left with a small bag of original parts. Some of the parts are just simple components like resistors from the original built, but have a few other small replacement parts that were given to me a few years back and never used. There is some kind of little transformer, a couple little tubes with the radiation sign on them (can't remember what these are for). I also have a meter, that seems to be stuck, if it can be repaired it has a very clean face. I didn't want to toss these as they are possibly useful to someone. If anybody wants them, they are free for the asking, just pay the shipping... which I estimated to be around $12 USD from Canada to the US. A photo of the parts is here: https://imgur.com/a/Oo9H5p3

This is the Universal Computer Spectrometer (MCA) that I used for all my sodium iodide (NaI(Tl)), and proportional based MCA, Gamma Spec and XRF, and MCS work with since the beginning of GammaSpectrometry Group It runs the same USX program (free) as does the UCS-30 but requires a 32 bit computer to work. Tesed, $600 + Shipping GEOelectronics@...

I need a LND 725 Geiger tube and thought that I would ask this list before buying one from LND just in case someone had one that they would part with.

It was discovered that the Victoreen CD V-715, in order to improve calibration stability, had to be modified slightly and a procedure was provided. We have the document for the procedure. The Victoreen CD V-715's sold on eBay can be compared against that document to verify that they have been retrofit I've recently seen a number of photos of CD V-715's made by Landers, Frary and Clark on eBay, stamped with an "R" to indicate a retrofit that have a capacitor soldered to the foil side of the printed circuit board but nowhere in my research have I come across anything that says that the LFC 715's were retrofit. I own one that does not have the capacitor or the "R". I am reaching out to the community for the lost Landers, Frary and Clark CD V-715 Retrofit Procedure document. Is anyone aware of a retrofit for the LFC survey meters? Clint

don't everyone jump on it at once.. there is a $1,250 ENI on E-Pay. Can't tell if it's plated in gold or what but must be something special at $1,250. ;) https://www.ebay.com/itm/144812439391?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=ZAxdCcCrQq-&sssrc=2047675&ssuid=punt3lqcrjm&widget_ver=artemis&media=COPY

The following files and folders have been uploaded to the Files area of the [email protected] group. /Doug Moore's Archives/Doug Moore meter puller.docx By: Michael J Emerson <michael-emerson@...> Description: Doug Moore's meter puller document

I have a Victoreen 6A with a damaged probe wire and I'm looking at repairing it. Does anyone know what material is used between the geiger tube and the tube socket inside the probe? Is it required for some reason? Clint

All, Does the voltage applied to the geiger tube have a significant effect on the calibration if it is within the operating range or 'plateau'? For the LND720, if I were to correct 950V down to 900V is recalibration required? Clint

No it doesn't Clint but there are many other factors to consider. See individul papers here: https://www.qsl.net/k0ff/Nuclear_Physics_101_by_George_Dowell/ ----- Original Message ----- From: Clint <clintb@...> To: [email protected] Sent: Mon, 26 Dec 2022 08:26:10 -0500 (EST) Subject: [CDV700CLUB] Probe voltage and calibration. All, Does the voltage applied to the geiger tube have a significant effect on the calibration if it is within the operating range or 'plateau'? For the LND720, if I were to correct 950V down to 900V is recalibration required? Clint