O'Neill's Electronic Museum

Penn Valley California

Vacuum Tube Museum

Triodes, Tetrodes, Pentodes, Klystrons and Beam Tubes
World War Two Era
Page 2 of 2

TS means the Translation is Suspect
All Italics Mine- KO

Click on photo for larger picture.

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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