Lot 0223

2 Braun's Cathode Ray Tubes, c. 1920

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Precision Tube Tester: Precision Apparatus Co. cathode ray tube tester. Series CR-30. Serial No. 2125. Dimensions: 13.75 " W x 7.00 " H x 18.00 "D. Apparently good. From Tekserve Collection

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Electromagnetic Motor with Geissler Tube, c. 1900: 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

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Group of Early Triodes and other Electron Tubes, c.: Group of Early Triodes and other Electron Tubes, c. 1920 onwards Triodes: Ader, 2 x Metal TM, Philips, Philips E, Replica R70, Philips M and 2 unmarked tubes (silvered interior). – Other tubes: Blu

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4 Physical Demonstration Tubes, c. 1910: 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:

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GROUPING OF VACUUM TUBES, C. 1930'S, UNTESTED: Approx. 10 lbs untested radio tubes; most are 5-pin and 6-pin types common in the 1930's and 1940's. Unsorted. A cursory inspection of the top layer shows the following types: 41, 42, 75, 39, 27, 89,

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Cathode Ray Oscillograph 256-D: Allen B. Du Mont Laboratories Clifton NJ, USA S/N 487

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Cathode-Ray Oscillograph & US Army Radio Receiver: Cathode-Ray Oscillograph by Allen B. Du Mont Laboratories Inc and Vintage US Army Signal Corps Radio Receiver R45/ ARR-7. Used, normal wear, untested.

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Ray C Edwards Etching "Dropping In" of Ducks: Ray C Edwards, 20th C American, etching "Dropping In", etching on paper, pencil signed "Ray C. Edwards". Depicts ducks flying into marshland.

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Item Details

Description

2 Braun's Cathode Ray Tubes, c. 1920
Each with horizontal deflecting plates, length 12 ½ and 26 in.

2 Braun'sche Elektronenstrahlröhren, um 1920
Jeweils mit horizontalen Ablenkplatten, Länge 32 und 66 cm.

Start Price: € 120

Condition

(3/–)

Buyer's Premium

22.3%

2 Braun's Cathode Ray Tubes, c. 1920

Name: 2 Braun's Cathode Ray Tubes, c. 1920
SKU: 45094976
Price: 350 EUR
Availability: InStock

Estimate €250 - €350

See Sold Price

Starting Price €120

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Item located in Koeln, de

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Auction Team Breker

Koeln, Germany

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