Antique radios, Old Time Radios
1P21
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Country:
United States of America (USA)
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| Identical to |
1P21
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| Similar
Tubes |
Normally replaceable-slightly different:
CV2696
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| First Source
(s) |
15.Nov.1949 : -- Original-techn. papers.
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| Base |
11-Pin-not-yet-known-by-us
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| Was used by |
Technology / Measurement |
| Filament |
|
| Description |
Nine-stage, side-on type having S-4 response. Wavelength of maximum spectral response is 4000 +/- 500 angstroms. This type makes use of cesium-antimony dynodes and a cesium-antimony, opaque photocathode. Window material is Corning No. 0080 lime glass or equivalent. Tube has a non-hygroscopic base. Supply voltage DC/peak AC between anode and cathode 1250 volts.
|
Dimensions (WHD)
incl. pins / tip |
30 x 85 x 30 mm / 1.18 x 3.35 x 1.18 inch |
| Weight |
50 g / 1.76 oz |
| Information source |
- - Manufacturers Literature RCA Phototubes and Photocells PT-60
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1P21: elektron taschenbuch 1952
Heinz Höger
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1P21: RCA
Patrice Zeissloff
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