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Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024


    Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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Hitachi Nuvistor Advertisement
March 6, 1964 Electronics Magazine Article

March 6, 1964 Electronics

March 6, 1964 Electronics Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Electronics, published 1930 - 1988. All copyrights hereby acknowledged.

According to the somewhat limited unique information (much repeated, as I'm doing here) available about the "nuvistor" vacuum tube amplifier, it was superior to many glass-encapsulated vacuum tubes. Lower noise figure, smaller size, greater ruggedness, intrinsically shielded, and relatively higher operating frequency (near a gigahertz) were the main marketing standpoint. RCA introduced the nuvistor in 1959, and shortly thereafter General Electric (GE), started making them, and then by 1964 (maybe earlier) Hitachi was offering nuvistors. The manufacturing process, where the entire assembly was performed in a vacuum chamber, made nuvistors more expensive than competitor glass tubes. The nuvistor concept might have been big if semiconductors (transistors) had not been making such rapid progress in supplanting most vacuum tubes. In fact, nuvistors (a portmanteau of "new" and "transistor") were supposed to tamp down interest in transistors, but history shows the winner in that contest.

Nuvistor, National Valve Museum - RF CafeA nuvistor was used in the front end of the HP3400A True RMS Voltmeter (thanks to Michael M. for that). Also, thanks to Bob Davis for pointing out that the Lafayette HB-400 CB radio sported a Nuvistor in the receiver front end. Here is a Nuvistor info resource. See the "Nuvistors and Micro-Modules," "The Tube Family Tree," "Lafayette Radio Electronics," "Hitachi Nuvistor Ad," "Using the Nuvistor on V.H.F. Bands," and the "The NASA 136" articles, too.

Hitachi Nuvistors Ad

Hitachi Nuvistor Advertisement, March 6, 1964 Electronics Magazine - RF Cafea complete range of quality Nuvistors by



Low Power Requirements




Hitachi now offers a complete range of nuvistors to the radio and television industry. Included are useful new Hitachi designed types. They are made with the precision, care and pride that go into every Hitachi product. Every nuvistor is carefully inspected before leaving the factory. Write Hitachi for detailed technical information and prices. Discover the advantages of specifying Hitachi nuvistors for your product.


Tokyo, Japan

Cable Address: "Hitachi" Tokyo

• 666, 5th Ave., New York 19, N.Y. U.S.A. Tel: Judson 6-4757

• 100 California St. San Francisco. Calif., U.S.A. Tel: Yukon 1-7871

• 333, N. Michigan Avenue, Chicago 1, ll., U.S.A. Tel: 726·4572/4

• Graf Adolf Strasse 37, Duesseldorf, West Germany Tel: 10846



Posted March 22, 2019

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