Tube or Röhre ID, Triode, vacuum, Nuvistor and Universal shown. Radio tubes are valves. Find great deals for NOS Vacuum Tube Jan RCA Nuvistor. Shop with confidence on eBay!. The nuvistor is a type of vacuum tube announced by RCA in Most nuvistors are basically – First one released, medium mu triode; – Sharp cutoff tetrode; – triode for low plate voltages; – triode, with plate cap & grid.

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Mullard’s exploded view of the Nuvistor triode and its component parts. You may just be able to see the Nuvistor logo on the valve itself.

RCA’s semiconductor division was doing well and intimately involved with transistor and integrated circuit development and manufacture. Metal Case and Twelvar Base A special case design was developed for these new valves, resulting in small size and very good high frequency performance, which are clearly good news for the RF stages of TV sets, but also have other useful attributes for more onerous applications.

Some useful links are at: Further triodes, such as the 6CW4 which is probably the most well-known Nuvistor and a tetrode or two followed over the next few years. Above is a dramatic two-page Nuvistof advert from showing that Nuvistors were being used 75586 the US manned space program, specifically here in monitoring the astronaut’s vital signs.

, Tube ; Röhre ID, Triode, vacuum

They competed with the solid state revolution, and along with GE’s Compactronprobably held it at bay for a few years. This microphone was nuvishor regarded by artists all over the world, and was used by many top recording artists such as Frank Nuvustor, The Beatles, and so on. Could RCA have developed a glass-based miniature valve with most of the attributes needed for use in TV tuners, and avoided the considerable tooling costs of putting the brand new mechanical design of the Nuvistor into production?


The way the ‘long’ and ‘short’ pins protrude through the ceramic base wafer can be seen.

One explanation is that RCA ‘transferred’ the design and manufacturing technology to Mullard under some mutually beneficial arrangement, as happened with many other valve designs. RCA brands Vacuum tubes.

Triodes and a few tetrodes were made. The RCAand triodes, and power tetrode, were designed to operate in sonobuoys. Transistors at that time weren’t the full answer to all problems in electronics, and so valves still had a lot to offer.

Unlike in a glass-based valve there is no getter structure, whose function is to eliminate the last traces of any remaining gasses after the valve has been evacuated and sealed.

Use in Sonobuoys The RCAand triodes, and power nuvistkr, were designed to operate in sonobuoys. The pins are integral with the internal structure of the valve, and do not have welded connections onto internal leads connecting to the electrodes, as is the case with most previous valve designs. Although valves continue to be used in specialised applications, e.

The B9A-based valves tended to have higher heater currents, and therefore dissipated higher power. As it turned out Nuvistor technology was extremely useful, and found many applications for many more years: After some pre-determined period of time these sonobuoys usually self-destruct by sinking themselves, so that they can’t fall into the hands of a potential enemy. Note that there are no mica spacers used to support and separate internal structures, as in ‘normal’ valves.

@ The Valve Museum

There may be ones I’ve missed, especially ‘special quality’ ones designed for rugged industrial applications. This solved any obsolescence issue as the was obtainable everywhere, and could easily njvistor replaced if necessary as it was mounted in a socket.


For the fans of conspiracy theories among you, I’ll just say how convenient for the US space program and military industries that a miniature, low power, static-proof, nuclear-hardened and rugged technology, with a plausible cover story, should happen to be developed at nuvistod time when it was needed the most.

RCA coined the word ‘Nuvistorization’, this being the process of designing Nuvistors into new equipment. Rangers were all failures, and variously failed to leave Earth parking orbit, lost contact with the Earth, missed the Moon or suffered failures of their cameras.

The February issue of The Radio Constructor described two versions of an aerial pre-amplifier for a radio telescope, centred on MHz. Valve Testers and Test Equipment So as not to obsolete their equipment the manufacturers of valve testers introduced adaptors as new valve types, such as Nuvistors emerged.

7586 NOS Vacuum Tube Jan RCA Nuvistor

I would think that the ‘HP’ valve was thus labelled for use in Hewlett-Packard test-gear but was not manufactured by Hewlett-Packard itself. Transliteration of the Russian Cyrillic alphabet.

Nufistor would think that the ‘HP’ valve was thus labelled for use in Hewlett-Packard test-gear but was almost certainly not manufactured by H-P itself.

They could also be found as the first stage in the vertical or Y amplifiers of high-end oscilloscopes.