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 valve was compact, at 37mm tall excluding pins, and its 6.

NOS Tube Store: RCA Nuvistor

Consumer 2DS4 – 2v. Radio Bygones Issue No. At first sight the fact that a new valve technology appeared in is surprising: The small size and rugged construction of the Nuvistor would seem to make it ideal for use in military applications.

Sources of Valve Data There are many sources of data for valves, for example: They could also be found as the first stage in the vertical or Y amplifiers of high-end oscilloscopes. From the date of this advert, I’d say the picture is an artist’s impression of a Mercury one-man mission. 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.

Transistors at that time weren’t the full answer to all problems in electronics, and so valves still had a lot to offer.

RCA’s semiconductor division was nuvistpr well and intimately involved with transistor and integrated circuit development and manufacture. Some sources of data that I use are: Another competing valve was the E88CC which in theory should have been numbered as the ECC88, but the special quality of the valve was indicated in the Mullard coding system by the numbers being presented immediately after the nnuvistor twin triode service code CVagain in a B9A envelope, and with a 6.


I ground away the metal around the circumference of the case of an RCA 6CW4 close to the base and you can see the ‘insides’ above.

They feature excellent VHF and UHF performance plus low noise figures, and were widely used throughout the s in television sets beginning with RCA’s “New Vista” line of color sets in with the CTC chassisradio and high-fidelity equipment primarily in RF sections, and oscilloscopes.

The B9A-based valves tended to have higher heater currents, and therefore unvistor higher power.

NOS Vacuum Tube Jan RCA Nuvistor | eBay

The electromagnetic pulse EMP produced by a nuclear explosion is likely to disable nkvistor transistor stages of a radio and so just protecting the front end is probably not enough. What surprised them was the crudeness of the plane’s structure and its avionics, and it was found that a lot of the ostensibly modern avionics in the aircraft used Russian copies of Nuvistors, for what was believed to be nuclear survivability. If you’re interested in investing in one or two, then eBay.

These views show the cylindrical electrodes very well and the supporting structure of the pins projecting directly through the ceramic base wafer.

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I don’t know whether these valves were mounted onto a PCB, or onto some form of tag-strip construction. Retrieved from ” https: The use of Nuvistors at this frequency, and in all the stages, seems like an indulgence, but it means that the resulting converter is neat and compact as is illustrated below. Geloso’s advert indicating the use of Nuvistors in their range of TV sets.

Use in Sonobuoys The RCAand triodes, and power tetrode, were designed to operate in sonobuoys. Click image for full datasheet The diagram above shows an extract from RCA’s datasheet for the 6CW4 showing the physical construction and dimensions. A Nuvistor was used in the plug-in wideband preamplifier module available for the Hewlett Packard L 50MHz counter-timer of the s. The Ranger series of unmanned spacecraft were launched between andand were the first US attempt to obtain close-up images of the Moon’s surface, in preparation for the manned landings at the end of the decade, as pledged by President Kennedy in This must have been quite tricky as it had to preserve the vacuum as the valve’s case warms up and cools down in service.


See below for how these pins look on a 6CW4. 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. I’ve added in some Russian Nuvistors, all with flying leads, but I’m sure there are many more types from this source which are not in the table.

From the date of this advert, the picture is probably an artist’s impression of a Mercury mission. Although it’s true that Nuvistors were the last significant development of the small signal valve industry, it’s wrong to regard them as RCA’s last attempt to fend off the transistor.

7586 NOS Vacuum Tube Jan RCA Nuvistor

Lower noise figures and higher frequency operation are obtained Tubes can handle momentary overloads while solid state devices generally will burn out.

The schematic of the 6CW4 grounded-cathode pre-amplifier in the July issue nuvjstor Practical Television. The is a medium mu triode. Texas Instruments and Fairchild announced their development of the first integrated circuits in late The U64 studio microphone was equipped with a Nuvistor from day one.

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.