Electron Tubes
Home Up Search Our Site Return Policy Order Form Physician Corner

 

 

 

Atomic & Nuclear: Electron Tubes

Perform practical experiments using Demonstration Electron tubes and tubes for students demonstrations from Teltron

 

 

Gas_Discharge_Tube_
(tube only)

 

Tube_Holder_S_

Helmholtz_Pair_of_Coils_S_

Diode_S_

Triode_S_

Luminescence_Tube_S_


Maltese_Cross_Tube_S_

 


Perrin_Tube_S_

Thomson_Tube_S_

Gas_Triode_S_
   

 

 

 

 

 

 

 

Gas Discharge Tube


Click on image to enlarge

For observing luminescence during electric discharge in gases at reduced pressure, and investigating cathode rays and canal rays occurring at low pressures outside the discharge path.
Glass tube with graded seal, disc-shaped, perforated electrodes and 4-mm-jacks for connecting the voltage supply .

Material: glass
Dimensions: approx. 700 mm x 4 mm Ø
Vacuum connection: graded seal NS 19/26

Additionally required:
1 U21060 6 kV High Voltage Power Supply
1 U14501 Rotary Vane Pump PK 4 D
1 U14505 Pirani Vacuum Gauge
1 U14510 2- Way Ball Valve
1 U14511 Crosspiece
1 U14513 Ventilation Valve DN 16/5
1 U14516 Adapter Flange DN 16 – Core NS 19/26
5 U14517 Standard Clamping Ring KF DN 10/16

Item: U14380

$315.00

Kappa Medical, LLC
PO Box 11808
Prescott, AZ  86304
1-800-634-0880 USA
1-928-776-9250 phone
1-928-776-9250 fax
kappamedical@gmail.com

Return to top of page

 


Tube Holder S


Click image to enlarge

The Teltron tube holder serves as a mounting for the entire tube program (U18552…U18571) for the student experiments and related accessories, such as Helmholtz coils (U18505) and auxiliary coil (U18506).
The tube holder with its 5-pole socket allows easy access to almost all tube connections via 4 mm-safety jacks. In addition a cathode protection circuit is integrated in the tube holder to safeguard the hot cathode against over voltage. Thus ensuring easy tube changing and easy and safe operation of the tubes. The Helmholtz coils can be fastened in both slots on the base of the tube holder. Each slot possesses a metric scale allowing precise adjustment of the coils up to a maximum spacing of 150 mm. The auxiliary coil can be inserted into the stepped front side of the tube holder .

Dimensions: 130 mm x 190 mm x 250 mm
Weight: 570 g

Teltron 2501
 
    Item: U185001

$437.00

Kappa Medical, LLC
PO Box 11808
Prescott, AZ  86304
1-800-634-0880 USA
1-928-776-9250 phone
1-928-776-9250 fax
kappamedical@gmail.com

Return to top of page

 


Helmholtz Pair of Coils S


Click image to enlarge

For generating magnetic fields for electron-beam deflections in the tube holder (U185001). The tube holder allows the coils to be configured in the Helmholtz geometry or at variable distances in order to produce magnetic fields aligned vertically with respect to the tube axis; it also allows coils to produce magnetic fields which are coaxial with respect to the tube axis.

Number of coil turns: 320 each
Coil diameter: 138 mm
Load rating:
• Continuous operation: 3000 A/m (12 V DC, 1.0 A)
• Short-term operation: 4500 A/m (18 V DC, 1.5 A)
DC resistance: R = approx. 6 Ohm
Connection: via 4-mm-jacks

Item: U185051

$417.00

Kappa Medical, LLC
PO Box 11808
Prescott, AZ  86304
1-800-634-0880 USA
1-928-776-9250 phone
1-928-776-9250 fax
kappamedical@gmail.com

Return to top of page

 


Diode S


Click image to enlarge

For investigating the Edison effect (thermionic effect) representing emission currents as a function of the heating power of the hot cathode. Recording the characteristics of diodes and demonstrating their application as rectifiers is possible. Also intended for determining specific charge e/m by means of the magnetron method (Helmholtz coils U181051).

Cathode heating voltage: Uh = 7.5 V, Ih = approx. 3 A
Anode voltage: Ua = 300 V
Anode current: typically Ia = 6.0 mA at Uh = 7.5 V, Ua= 300 V

Additionally required:
U185001 Tube holder
U210501 Power supply, 500 V DC

Item: u185501

$475.00

Kappa Medical, LLC
PO Box 11808
Prescott, AZ  86304
1-800-634-0880 USA
1-928-776-9250 phone
1-928-776-9250 fax
kappamedical@gmail.com

Return to top of page

 


Triode S


Click to enlarge image

For quantitative investigations of controllable high-vacuum tubes. Recording triode characteristics, determining the negative polarity of electron charges and generating cathode rays (model of an 'electron gun') is also possible. Also intended for investigating technical applications of triodes as amplifiers and oscillators (with Helmholtz coils U18505).

Cathode heating voltage: Uh < 7.5 V / Ih < 3 A
Anode voltage: Ua < 300 V
Anode current: typically Ia = 1.4 mA at Uh = 7.5 V, Ua = 300 V
Grid voltage: -300 V < Ug < 300 V
Grid current: typically Ig = 0.9 mA at Uh = 7.5 V, Ua = 300 V

Additionally required:
U18500 Tube holder
U210501 Power supply, 500 V DC

Item: U18551

$519.00

Kappa Medical, LLC
PO Box 11808
Prescott, AZ  86304
1-800-634-0880 USA
1-928-776-9250 phone
1-928-776-9250 fax
kappamedical@gmail.com

Return to top of page

 


Luminescence Tube S

For investigating luminescence during and after electron bombardment of a phosphorous anode, as well as excitation of fluorescence and phosphorescence. Luminescence can also be observed following irradiation of the phosphorous anode with ultraviolet light.

Cathode heating voltage: Uh < 7.5 V, Ih < 1.8 A
Anode voltage: Ua < 5 kV
Anode current: typically Ia = 150 µA at Ua= 4.0 kV

Additionally required:
U18500 Tube holder
U21060 High-voltage power supply, 6 kV

Teltron 2522
 
       Item: U18552

$675.00

Kappa Medical, LLC
PO Box 11808
Prescott, AZ  86304
1-800-634-0880 USA
1-928-776-9250 phone
1-928-776-9250 fax
kappamedical@gmail.com

Return to top of page

 


Maltese Cross Tube S

 


Click image to enlarge

For demonstrating the linear propagation of electron beams in field-free spaces by projecting the shadow of a Maltese cross on a fluorescent screen. Also intended for observing the focussing of electron beams by magnetic fields as an introduction to electron optics. Comparison between the Maltese-cross shadows of electron beams and electromagnetic radiation (light) in a magnetic field.
The lower segment of the Maltese-cross has a hole which makes it possible to ascertain the orientation of the cross' shadow under the influence of magnetic fields.

Cathode heating voltage: Uh < 7.5 V, Ih < 1.8 A
Anode voltage: Ua < 5 kV
Anode current: typically Ia = 150 µA at Ua= 4.0 kV

Additionally required:
U18500 Tube holder
U21060 High-voltage power supply, 6 kV

Additionally recommended:
U18505 Set of Helmholtz coils
U11700 DC power supply 0-16 V, 0-5 A

Teltron 2523
 
       Item: U18553

$619.00

Kappa Medical, LLC
PO Box 11808
Prescott, AZ  86304
1-800-634-0880 USA
1-928-776-9250 phone
1-928-776-9250 fax
kappamedical@gmail.com

Return to top of page


Perrin Tube S


click image to enlarge

For demonstrating the negative polarity of electron beams through magnetic and electric deflection of the beams toward a laterally positioned Faraday cage connected with an electroscope (for example, U17250) for this purpose. Also for investigating electron beams in two perpendicularly aligned magnetic alternating fields (operation of a cathode-ray oscilloscope, Lissajous figures) and estimating specific electron charge e/m. With a fluorescent screen.

Cathode heating voltage: Uh < 7.5 V, Ih = approx. 0.35 A
Anode voltage: Ua < 5 kV
Anode current: typically Ia = 150 µA at Ua= 4.5 kV
Beam current: typically Ia = 4 µA at Ua= 4.5 kV
Deflection voltage: U < 350 V

Additionally required:
U18500 Tube holder
U18505 Set of Helmholtz coils
U21060 High-voltage power supply, 6 kV
U11700 DC power supply 0-16 V, 0-5 A

Additionally recommended:
U18506 Auxiliary coil

Teltron 2524
 
      Item: U18554  $675.00 each

 

Kappa Medical, LLC
PO Box 11808
Prescott, AZ  86304
1-800-634-0880 USA
1-928-776-9250 phone
1-928-776-9250 fax
kappamedical@gmail.com

Return to top of page


Thomson Tube S


Click image to enlarge

For investigating electron beams in electric and magnetic fields and determining specific charge e/m through compensation of magnetic deflection by electrostatic deflection or ascertainment of the radius of curvature of the electrons in the magnetic field. Also for estimating the speed of electrons.
An integrated plate capacitor allows electron beams to be deflected electrostatically and – by using Helmholtz coils (U18105) – magnetically. The path taken by the electron beams is rendered visible on a fluorescent screen with a scale inclined by 10° with respect to the beam axis.

Cathode heating voltage: Uh < 7.5 V, Ih < 0.4 A
Anode voltage: Ua < 5 kV
Anode current: typically Ia = 0.2 mA at Ua = 4 kV
Deflection voltage: U < 350 V

Additionally required:
U18500 Tube holder
U18505 Set of Helmholtz coils
U21060 High-voltage power supply, 6 kV
U11700 DC power supply 0-16 V, 0-5 A

Teltron 2525
 
     Item: U18555  $866.00 each

Kappa Medical, LLC
PO Box 11808
Prescott, AZ  86304
1-800-634-0880 USA
1-928-776-9250 phone
1-928-776-9250 fax
kappamedical@gmail.com

Return to top of page


Gas Triode S


Click image to enlarge

For quantitative investigations of the typical properties of a gas-filled triode, recording the IA - UA characteristics of a thyratron. Observing independent and dependent discharges as well as discontinuous energy release of He atoms during inelastic collisions with free electrons.

Cathode heating voltage: Uh < 7.5 V, Ih < 3 A
Anode voltage: Ua < 300 V
Grid voltage: -300 V < Ug < 300 V

Additionally required:
U18500 Tube holder
U210501 Power supply, 500 V DC

Teltron 2532.02
 
      Item: U18557  $645.00

Kappa Medical, LLC
PO Box 11808
Prescott, AZ  86304
1-800-634-0880 USA
1-928-776-9250 phone
1-928-776-9250 fax
kappamedical@gmail.com

Return to top of page