For the Corotron you can usually just leave that in the circuit and install the replacement board in parallel across it. GeoElectronic also sells a volt meter for the HV I have one and it works great.

I bought the repair kit to do mine maybe next week. I will pay attention to the polarity of the new zener diodes when I install it. Thanks good video.

Great video....

I just bought one of these in working order & good condition if you need Hi-Res photos. I also bought a CDV-715 Ion Chamber that I think the meter was wired in wrong in a botched repair but I dont have the knowledge in electronics to fix at this time. I am learning quickly! Lucky there are great uranium deposits in the area with great crystals. There is a free book on audible called Atomic Adventures that has a chapter on the development of radiation detection meters. I'm thinking of doing the mod to my CDV-700, probably going to wait a few weeks to know what I'm doing. Great videos keep them coming please. If you have a 715 ion chamber please do a video on that circuit.

You must have had a minute amount of corrosion on one of the connections, when you reassembled it the problem cleared its self

Thanks for your help

More good stuff.

You said your Zener diode stack was backwards. How did you figure this out? Did you align the red dot with the red dot?

i wonder if its the same on the lionel cdv700 6b

Hi I'm just Wondering if you have a Link to the ebay page wheee you got your parts from.because I'm having a similar issue with my CDV700 geiger counter

@TheMadHatter1337

Жыл бұрын

I looked, it appears no one sells kits anymore... That being said, they are just 3 high voltage Zener diodes in series (Total of 900V).

radium has a half life or 1600 years actually and that's completely incorrect

@ethansav0892

2 жыл бұрын

Say that to all the bad coronatron tubes rip

@deeaks100

2 жыл бұрын

radium has isotopes with half lives ranging from a couple of days to thousands of years. it all depends on which isotope you're talking about.

@TheMadHatter1337

Жыл бұрын

False - There are multiple isotopes... The average decay for a pit is closer to 10-20 years.

@kingcanada2588

Жыл бұрын

@@TheMadHatter1337 radium stays radioactive from 1000s of years

@OH8EFI

6 ай бұрын

​@@kingcanada2588Plain radium? There's no plain radium inside the tube. It's an isotope of it. But most of the corotron tubes use Nickel-63

...I just skipped all of this and built my own.

@TheMadHatter1337

5 ай бұрын

Yea, geiger counters are trivial with modern technology… the point of the video is to walk people through how it works if they wanna fix their own.