8 Vacuum Tubes for Physical Demonstration

Group of Vacuum Tubes, c. 1915 Physical demonstration models. 1) Geissler tube lighting up by friction, length 19 1/3 in. – And: 2) 10 various Geissler tubes, 2 of them liquid-filled, some uranium

Electro-Magnetic Motor with Rotating Geissler Tube, c. 1915 Physical demonstration model, height 9 7/8 in., tube length 10 1/5 in., good condition, untested. Elektromagnetischer Motor mit rotieren

Electromagnetic Motor with Geissler Tube, c. 1900 Physical demonstration model, for tubes up to 6 in., overall height 8 in. Elektromagnetischer Motor mit Geißler'scher Röhre, um 1900 Physikalisches

2 Physical Demonstration Models, c. 1910 1) Crookes' radiant matter tube, height 16 ½ in. – And: 2) Winkelmann-type vacuum double bulb, 1 glass tip broken, height 15 ¾ in. 2 physikalische Demonstr

4 Physical Demonstration Tubes, c. 1910 1) Crookes tube, for demonstrating a magnetic altering the direction of radiant matter, length 13 1/3 in. – 2) Tubular magnet coil, height 10 1/5 in. – And:

Various types. Most are in their own boxes. See photos.

Large Electro-Magnetic Motor with Rotating Geissler Tube, c. 1910 Physical demonstration model, height 18 ¼ in., for tubes of up to 15 3/4 in. length, brass and steel, on walnut base, later tube, ve

Electric Motor with 10 Geissler Tubes, c. 1910 Physical demonstration model with rotating Geissler tubes, on brass pillar and walnut base, height 7 ½ in., with 10 tubes of various shapes and colors.

Electro-Magnetic Motor with Rotating Geissler Tube, c. 1890 Physical demonstration model, two electro-magnets, on wood pillar, with wood and brass holder and original Geissler tube, for creating a daz

2 Physical Demonstration Models with 9 Geissler Tubes, c. 1910 1) Stand with turning star and 3 tubes with uranium spirals. – And: 2) Isolated stand with 6 tubes of different shape and color, 2 of t

Group of Physical Demonstration Models, c. 1900 1) Wimshurst's influence machine, Trüb, Fierz & Cie., Zurich, height 14 ½ in., complete, rubber straps need to be renewed. - 2) 8 chromic acid

2 Large Physical Demonstration Instruments, c. 1880 1) "Electrical Egg", for the demonstration of an electrical discharge between two electrodes in a near vacuum, original lacquered brass, height 25 i

Ca. 1937(8). Stromberg-Carlson Co. 240-H features eleven tubes and three bands. Good overall, with minor surface imperfections and other age-appropriate wear. Untested. One of the most rare sets of th

United States,Early 20th Century Group includes two Western Electric 216A tubes, one VT2, one 215A, two deForest Audion tubes, and one with illegible markings on stem. Largest 4 1/4" x 2 1/8",Glass, m

5 Physical Demonstration Instruments, c. 1920 1) "Mammoth" X-ray air-cooling tube with regeneration device, made by Cuthbert Andrews, England, length 20 in. - 2) Crookes cathode ray tube, for demonstr

1940 Emerson Model 336 Vacuum Tube Bakelite Table Radio. Turns on, picks up a station. May need tuning. Repairs made to bottom right. In-house shipping available. Dimensions: 8 x 11 x 6

Vintage Shortwave Radio A2 H3 H5 Vacuum Tube Lot of 3 Approximately 5 1/8 and 5 1/4 inches.

Group of Scientific Instruments Physical demonstration models and others: 5 various Crookes cathode ray tubes, 1 x-ray tube (defective), 15 glass valves, 4 stands, 3 Leyden jars, 2 glass tubes with me

Tri(Triode)Vacuum Tube Integrated Amplifier. Triode TRV-A300. Stands 8 1/2" tall. Power output 8 watts per channel into stereo. Frequency response 10Hz to 50KHz. Total harmonic distortion 0.3%.

Mercury Model 990 Portable Small Vacuum Radio Tube Tester2 lbs, 6 x 8 x 3 Shipping in continental US $18.00 Please ask any questions before bidding Good Luck!

The cross-vacuum scale demonstration is to show the variations of electric glow discharge when voltage is applied to a set of glass (Geissler) tubes. Each tube is gas filled and all have varying level

Demonstration Microscope and Hand-Held Spectroscope 1) Nickeled brass microscope, substage pinhole diaphragm, draw tube, detachable grip, height 8 ¾ in., with case, c. 1900. – And: 2) Spectroscope,

Collection of Physical Demonstration Models and Technical Devices 1) Carbon arc lamp, demonstration model by John Browning, London, original lacquered brass, 2 graphite electrodes, one height-adjustab

Set 25 NOS Ultron EM34 Radio Vacuum Tubes in Boxes. Condition:New old stock, never used and very clean boxes and outer boxes Shipping:We offer in-house shipping. Item(s) will be packed after invoice i