Antique radios, Old Time Radios
2K25
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| Tube type: |
Reflex Klystron |
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| Identical to |
2K25
= RK2K25
= CV2792
= К-27
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| Similar
Tubes |
Normally replaceable-slightly different:
723A/B
Other class quality (otherwise equal):
55390
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| First Source
(s) |
06.Oct.1948 : Electron Tube Registration List 699
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| Predecessor Tubes |
723A/B
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| Base |
Octal with RF-contact (long) (Codex=sp)
Top contact with a cap.
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| Was used by |
Radar |
| Filament |
Vf 6.3 Volts / If 0.44 Ampere / Indirect / Specified voltage AC/DC |
| Description |
8.5 to 9.7GHz reflex klystron, 25mW output through a small coaxial probe from the octal base. Improved design 723A/B, from which it differs for the more extended tuning range. Sometimes available with dual marking 723A/B / 2K25: actually a 2K25 underutilized when replacing the first one.
Made by several manufacturers worldwide, including Heintz-Kaufman, Raytheon, Sperry, WE, Philips and its related plants, as Valvo and Amperex.
Text in other
languages (may
differ)
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Dimensions (WHD)
incl. pins / tip |
40 x 90 x 25 mm / 1.57 x 3.54 x 0.98 inch |
| Weight |
65 g / 2.29 oz |
| Tube prices |
4 Tube prices (visible for members
only)
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| Information source |
Taschenbuch zum Röhren-Codex 1948/49
Tube Lore (I)
- - Manufacturers Literature
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2K25: Philips 2K25 Datenblatt
Otto Frosinn
More ...
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Just Qvigstad
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2K25: Manufacturer's Literature
Emilio Ciardiello
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):6
Collection of
Collection of a member from D |
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Forum contributions about this tube
2K25
Threads: 1 | Posts: 1
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Hits: 2339 Replies: 0
2K25 (2K25)
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Otto Frosinn
12.Jan.07
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1
Hallo, liebe Sammlerfreunde!
Das Sockelbild zum Reflexklystron 2K25 aus "Taschenbuch zum Röhrencodex, 1948" ist irreführend, wenn nicht falsch.
1.Der Reflektor ist die kathodenfernste Elektrode; somit nicht als kathonennahes Gitter, sondern eher wie eine Anode zu zeichnen.
2.Der Resonator ist kein offener Topf, sondern kann besser als ein Doppelgitter, das an den Enden verbunden ist gezeichnet werden.
3. Die Auskopplung aus der Resonatorkammer auf ein Stück Koaxleitung (Position Pin 4) ist beim 2K25 induktiv, darf daher nicht wie ein halber Kondensator gezeichnet werden.
Richtig ist das Sockelbild aus dem Philips Datenblatt zum 2K25.
Mit freundlichen Sammlergrüßen otto Attachments
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2K25
End of forum contributions about this tube
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