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Re: Lack of Groups Activity for a Long Time...
开云体育No news is good news. The proxy war in the Ukraine hasn't gotten
out of hand. No tsunamis lately, either. On 11/6/2024 2:15 AM, Cliff via
groups.io wrote:
Dear Group Members, |
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Re: i need help with my cdv700
开云体育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:
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Re: i need help with my cdv700 eni ready made circuit available
开云体育I don't know. I don't have the specs on the original transformer
and I don't have an ENi to mess around with and see.
On 9/13/2024 6:22 PM, Group
Notification wrote:
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Re: i need help with my cdv700 eni ready made circuit available
开云体育You can do whatever you want. I'm not an electrical engineer.
It's your CDV. The flyback circuits on the CDV used germanium
diodes. Newer HV step ups use silicon diodes. On 9/13/2024 12:41 PM, Group
Notification wrote:
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Re: i need help with my cdv700 eni ready made circuit available
开云体育The inverter module has to be powered isolated and separate from
the rest of the CDV. If it takes 9v give it a 9v battery or
whatever. On 9/13/2024 4:10 AM, peter via
groups.io wrote:
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Re: i need help with my cdv700 eni ready made circuit available
开云体育Yes, that one. To install it, the center lead of the tube cable is the HV. If you have to ask how, you would be better off paying someone to do it. It's HV, the CDV is positive ground which was standard in the day. The module is negative ground, which is standard today, so the module must be powered by batteries of it's own and isolated from the rest of the ENi. There is plenty of room inside to do that if you switch to AA cells from the original 2x2 D cells.
This is my instructable from many years ago. The output of the new
module goes into the board where the zener is in step 2. Because
the module is adjustable, you won't need the zener. Lift the
resistor off the board as in step 2 and connect the output of the
module to the resistor, and make sure the ends are not touching
anything else. Adjust the module up until you get clicks from a
source. I have seen ENis run of just over 800 volts. The higher
you go the more likely you are to break something else. On 9/12/2024 7:10 PM, Group
Notification wrote:
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Re: i need help with my cdv700 eni ready made circuit available
开云体育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. ?? $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.
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Re: i need help with my cdv700 eni
let's try....??
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From:?Lenox Carruth <radios@...>
Sent:?Friday, May 08, 2020 9:29 AM To:?'MT C' <mtcooper01@...> Subject:?RE: [GeigerCounters] Intro, and seeking help with another CDV700 project ? ? I Michael, ? These transformers have flexible, colored wire leads so they will fit any hole pattern.? All of the wires come out of one side of the transformer and they are probably an inch-and-a-half long.? You might need to put washers underneath the transformer when you mount it so some of the wires can go under the transformer.? That’s what I had to do with the Victoreen.? I can’t guarantee that these will work but I don’t see why they wouldn’t.? All of these units are just making 900 Volts from a 3 Volt supply. ? I’m a Mechanical Engineer so I understand the problem.? This would be easier if it were a steam engine! ? Lenox ? ? ? From:?MT C [mailto:mtcooper01@...] ? Hi Lenox, ? Sure..??? but the ENI transformer and Victoreen are wired differently.?? The victoreen has two leads one side 4 the other.? The ENI transformer has 3 leads each side.??? Does that matter?? I am not an EE -? a chemical engineer by degree but never clicked with EE????? ? Michael ? From:?Lenox Carruth <radios@...> ? ? I have a couple of Anton transformers that work okay in a Victoreen and will probably work okay in your ENI.? They have colored wire leads so they will fit any board.? The transformers were all pretty much the same.? You may need to make the changes that George made for? his LENI modification which adds a Zener high voltage regulator since the ENI regulates the input rather than the output voltage. ? I think that there is a possibility that these were “universal” replacements because they don’t have the Anton part number but they do have the Anton color coded wires. ? If you want them, I can send them to you for the postage in a small flat rate box which costs slightly less than $9. ? Lenox ? ? ? From:?[email protected]?[mailto:[email protected]]?On Behalf Of?Michael C ? where would one get an ENI transformer?? I have a NOS Victoreen transformer, but it is different than the ENI.? And of course the old manuals for these things reference long obsolete part numbers.??? |
David71
Michael C