Organize and Share your Electronics the way you want. Sign-Up for a free account now. It takes only 30 seconds!

CDV700 Geiger Counter Probe Rebuilding

CDV700 Geiger Counter Probe Rebuilding

Describes the process of rebuilding a geiger counter probe from the Victoreen CDV700 geiger counter.
The process of converting the hard-wired probe to a probe with a pluggable BNC connector is also described. The probe from the model CDV700-6B is similar, but not identical, the socket is easier to access on that model.

The probe from my CDV700 geiger counter had a worn out probe wire, moving it would cause false clicks from the counter, or no readings at all. The remedy was to rebuild the probe assembly as follows:

Unscrew the top of the probe from the bottom by twising counter-clockwise until the two parts come apart. Don’t be confused by the alpha shield in the middle of the probe, it turns freely. The geiger tube should be connected to the bottom of the probe assembly at this point.

Gently rock and pull the 6993 geiger tube from its base until it comes out of the socket. This may take a while, be careful since the tube is fragile, it is also the most important component in the whole unit.

There is a brown rubber plug between the geiger tube and the 3-pin black amphenol socket. Push a small flat screwdriver around the edge of the rubber plug to loosen it from the sides of the probe, then use a needle nose pliers to gently pull the plug from inside of the probe.

The original wire is tied in a knot at the bottom of the probe and glued in with hard gray potting compound. Clip the wire off at the base of the probe.

The black 3-pin Amphenol tube socket is soldered to the glued-in wire. It can be removed by gently twisting to the left and right until the original wires break off. Do this by putting small needle nose pliers into 2 of the socket holes. Don’t get too agressive, the socket is brittle and can easily break. The socket pins can also break. In the worst case scenario, if the socket breaks, it should be possible to solder the wires to the geiger tube pins, or to what’s left of the socket pins. Be sure to observe which wire goes to which pin. If you lose track of which wire connects to which pin, some live experimentation can be used to figure out which connections make the counter work. Beware of the 900 Volts across the wires when the counter is on.

Visit Here for more.







 

More Articles to Read

Design for a Wideband, Differential Transimpedance DAC Output
Design for a Wideband, Differential Transimpedance DAC Output
Wrist thrusters let you fly through the water effortlessly
Wrist thrusters let you fly through the water effortlessly
Bertan/Spellman 225-20R HV power supply teardown
Bertan/Spellman 225-20R HV power supply teardown
Blinking Christmas Lights
Blinking Christmas Lights
Adjusting clock with alarm, hygrometer & thermometer on 1.8″ ST7735 display
Adjusting clock with alarm, hygrometer & thermometer on 1.8″ ST7735 display
Adding an “extra sense” with rangefinders
Adding an “extra sense” with rangefinders
This wireless game controller looks like a rug
This wireless game controller looks like a rug
How to run your ESP8266 for years on a battery
How to run your ESP8266 for years on a battery
Calibration of a 3-Phase Energy Meter Board on the ADE7754
Calibration of a 3-Phase Energy Meter Board on the ADE7754
Making beats on a tiny Arduino DJ controller
Making beats on a tiny Arduino DJ controller
Qinsi-QS5100 Sn63Pb37 solder profile
Qinsi-QS5100 Sn63Pb37 solder profile
Water Detection System
Water Detection System
Professional Hi-Fi 15W Tube Amplifier circuit
Professional Hi-Fi 15W Tube Amplifier circuit
This Arduino machine will judge how sick your ollies are
This Arduino machine will judge how sick your ollies are
Turn an old payphone into a boombox for ’90s hits
Turn an old payphone into a boombox for ’90s hits
Big F’n 3D printer build
Big F’n 3D printer build
Temperature alarm for boiling milk
Temperature alarm for boiling milk
QuadBot is a 3D-printable walking robot for everyone
QuadBot is a 3D-printable walking robot for everyone
MicroConverter I2C Compatible Interface
MicroConverter I2C Compatible Interface
An Arduino tachometer for your older vehicle
An Arduino tachometer for your older vehicle

Top


Shares