Cathode Ray Tubes
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Oscilloscope CRTs
A small DG3-2 with 3cm face
Green phosphor screen early oscilloscope tube. (1938)
RCA 3RP1  3"CRT
Medium persistence green phosphor.
Oscilloscope tube
DG 7-2   7cm CRT Philips
Green phosphor screen
Used in one of the first Philips oscilloscopes (1938). Click on the picture to see the working scope.
AEG HR1/60/0,5  6 cm CRT
Early German wehrmacht CRT (1940)
Crude heavy gun construction
DuMont 5XP2A  (1956)
5" wide-band oscilloscope tube
Long persistence green phosphor.
RCA 3AP1A  3" flatface CRT
Medium persistence green phosphor.
Oscilloscope tube, successor of the RCA 906 tube which has a clear glass envelope.
Telefunken D9-10GH 4" CRT
Medium short persistence green phosphor.
Oscilloscope tube
Brimar dual gun 5" CRT with spiral accelerator
Long persistence green phosphor.
Oscilloscope tube
Philips DG7-32 / CV2431  7cm CRT
Medium short persistence green phosphor.
Oscilloscope tube
Brimar-Thorn EMI waveform tube
Used in TV waveform monitors.


RCA 5ADP1
5" oscilloscope green phosphor tube
Tektronix / SONY 154-0667-02
Small 3" CRT tube for portable oscilloscope
150CNB31T-RP
Matsushita waveform monitor CRT
Telefunken DG7-52 / 3BNP-1  7cm CRT
Short persistence green phosphor.
Oscilloscope tube, very short tube, only 15cm.
Tektronix 154-0786-00
Oscilloscope tube
Telefunken DG3-12 3cm CRT
BRIMAR 3" CRT
Single gun oscilloscope tube with spiral accelerator.
Tektronix 154-0850-01
Advanced CRT from the 2445B Oscilloscope.
Tektronix type unknown
Oscilloscope tube
Toshiba 150CTB31 14cm CRT
Oscilloscope tube
VALVO (Philips) D10-160 10cm CRT
Oscilloscope tube
Philips L14-140GH 14 cm storage CRT
Variable persistence green phosphor
Oscilloscope tube with advanced memory screen.
HP Oscilloscope tube with storage screen.
5083-1972 3x 4" face.
Philips dual gun E10-165P
With spiral accelerator.
RCA 5UP7 5" Oscilloscope CRT
Long persistence blue white phosphor CRT.
VCR518 early 4" double beam CRT
Blue blue phosphor (1940)
DN 7-2 7cm CRT
Long persistence green phosphor (1937)
DG7-5 Philips
7cm screen
Unknown early Philips CRT
7cm screen (ca1936)

  The spiral which can be seen on the CRT's to
  the left is a special kind of accelerating anode  
  called a Post Deflection Anode (PDA).
  By deflecting before acceleration, much higher
  sensitivity could be obtained because the
  beam, still travelling slowly, spent more time
  between the deflection plates. A special
  anode was needed for this with a distributed
  potential, to get the least distortion the anode
  was a thin spiral of graphite with the potential
  applied between the ends of the spiral which
  was wound from the screen to the electron
  gun in the neck.


Tektronix engineering sample T3240.
Tube with ceramic envelope.
Philips DG16-1
Early 16 cm tube with separate deflection connections for high frequency purposes with green phosphor. (1936)
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Proto
types
1930 -1940
1940 -1945
1945 - 1960
1960 - 1980
1980 -2000
2000 - now
D14-376GH/123 the last tube made in Europe by Cathode Ray Technology
28 September 2012.