Philips Holland TB4/1250 Triode |
SFR France E756 Triode |
SFR France EG400 Pentode |
Amperex USA ZB3200 Triode: four such 5600 W Triodes connected in parallel provided
battleships a much needed output of 250 (25 kilowatts? possible typo)
kilowatts. Because of disassembly damage, it was glued with Epoxy. |
1942 GE USA GL316A Triode: The following tubes show that the industry always attempts
smaller types for very high frequency and high power applications. TS |
1941 Western Electric USA 717A Pentode: These tubes were short lived
(market lifetime) and succumbed to the competition. |
Mullard England EC52 Triode |
1935 RCA USA 955 Triode The "acorn tubes" last longer and were
happily used by radio amateurs. |
Tung-Sol 954 Pentode |
RCA USA 957 Triode: Rare |
(left) RCA USA 5675 Triode: This, very small triode is inserted directly (without a socket) into the resonant circuit.
As an oscillator it supplies 300 mW with a frequency of 3300 MHz. |
(right) GE USA A2196S: The "Rocket tube" is inserted likewise without bases
directly into the resonant circuit and results in 500 mW at 5000 MHz |
Eimac USA 2C39A (7289) Triode:
The ceramic design of the aforementioned tube improves cooling, resulting in: 25 Watts at 2500 MHz |
KB/M England CV238 Klystron:
To set frequency the circular resonator circle (see Klystron notes) is adjusted by the
7 machined screws. No further data available. |
Raytheon USA C6309 Klystron:
This klystron can be adjusted to between 1600 and 6500 MHz by changing the repeller grid voltage.
Achieving some milliwatts |
Telefunken Germany 723A/B Klystron:
With this klystron the repeller can be adjusted with a screw. |
(left) 1959 RCA USA 7895 Triode:
Desperate attempt to save tube production from the arising new Nuvistor,
sounds similar to transistor. |
(right) 1959 RCA USA 7587 Tetrode:
Fully automated Ceramic construction with higher temperatures of manufacture.
Unique quality, but brought RCA losses of millions. Given up. |
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