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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The accompanying photograph showed a Nuvistor ‘being born’, nuviator out of an egg. Above is a dramatic two-page RCA advert from showing that Nuvistors were being used in the US manned space program, specifically here in monitoring the astronaut’s vital signs.

Some sources of data that I use are:. I think I can see some examples with squarer shoulders than others, so maybe the single manufacturer theory is incorrect. RCA’s semiconductor division was doing well and intimately involved with transistor and integrated circuit development and manufacture.

These Russian wire-ended valves have the advantage that they do not need a socket, which in a high-reliability application such as a military aircraft is a major source of failure, and can be wired directly into circuit. A useful website on valves, with a section dedicated to Nuvistors can be found here. I would think that the ‘HP’ valve was thus labelled for use in Hewlett-Packard test-gear but nuvitor not manufactured by Hewlett-Packard itself.

Here is a list of the more frequently seen Nuvistors Industrial.

List of vacuum tubes List of tube sockets. RCA brands Vacuum tubes. The rigidness of the Nuvistor structure makes these valves very resistant to microphony, and hence they don’t generate and sustain uncontrolled acoustic feedback. The is a medium mu triode.

NOS Vacuum Tube Jan RCA Nuvistor | eBay

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 a time when it was needed the most.


Innovation at the Nuvisror of the Valve Era The development of the Nuvistor in the lates was probably the last major innovation in receiving valve technology, coming as it did towards the end of the era of thermionic nuvistoor domination. Brimar described its 6AM4 introduced in as being ‘for grounded-grid amplifier or mixer use in the frequency range to MHz’.

The B9A-based valves tended to have higher heater currents, and therefore dissipated higher power. Conclusions Texas Instruments and Fairchild announced their development of the first integrated circuits in late There is some evidence that Marconi tried Nuvistors in the front end of the prototype Clansman radio. Mullard describe the valve as a high-slope RF pentode primarily intended for use in wideband amplifiers in telephone carrier systems, radar equipment and measuring equipment.

The RCAand triodes, and power tetrode, were designed to operate in sonobuoys. These views show the cylindrical electrodes very well and the supporting structure of 75886 pins projecting directly through the ceramic base wafer.

In nuvietor mids the Knight range of quality receivers and amplifiers were offered as kits in the UK, by Electroniques. The ceramic base is about 10mm in diameter. The valve was also given the service code CV This microphone was nuvustor regarded by artists all over the world, and was used by many top recording artists such as Frank Sinatra, The Beatles, and so on. Many professionally-built equipment for the amateur bands used Nuvistors.

7586 NOS Vacuum Tube Jan RCA Nuvistor

The small size and rugged construction of the Nuvistor would seem to make it ideal for use in military applications. Cut-away view of a Nuvistor triode leftand a tetrode right with a top cap connection to the anode, as typical of the Capacitor types Ceramic resonator Crystal oscillator Inductor Parametron Relay reed relay mercury switch. Having researched this subject I’m not sure this is true and hopefully after reading this article you’ll be able to form your own opinion.


Valve Testers and Test Equipment So as not to obsolete their equipment 756 manufacturers of valve testers introduced adaptors as new valve types, such as Nuvistors emerged. If you search for ‘nuvistor’ on eBay, you’ll find many examples for sale, along with their photos.

RCA’s data for the 6CW4 showing the physical construction and dimensions. I think it’s easier to get valve data today than ever, because of the heroic actions of people who have entered manufacturers’ data from scratch, scanned data sheets into pdf and gif format and made them available on the Internet.

Nuvistors have very low inter electrode capacitances and transit times which means they are usable at VHF and low UHF frequencies, where they considerably out performed the transistors then available.

One made use of the A in grounded-grid mode, and the other used a Mullarddescribed as ‘the counterpart of the American 6CW4’.

There may be ones I’ve missed, especially ‘special quality’ ones designed for rugged industrial applications. Here at The National Valve Museum I think it’s easier to get valve data today than ever, because of the heroic actions of people who have entered manufacturers’ data from scratch, scanned data sheets into pdf and gif format and made them available on the Internet.

If this is true then they must have had arrangements whereby they supplied these devices to other valve manufacturers who then offered them for sale as their own products. Use in the Audio Studio One famous audio application of the Nuvistor was in the mids Ampex MR, a costly studio-grade 1-inch 4-track tape recorder whose entire electronics section was based on triodes and push-pull pairs of tetrodes. These codes 75886 best-case transliterations from the Russian Cyrillic alphabet.