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.
|Published (Last):||20 September 2010|
|PDF File Size:||12.95 Mb|
|ePub File Size:||18.17 Mb|
|Price:||Free* [*Free Regsitration Required]|
Click image for full datasheet The diagram above shows an extract from RCA’s datasheet for the 6CW4 showing the physical construction and dimensions.
They also used Nuvistors in a range of TV sets produced in the earlys, and advertised the fact inas shown below. The use of Nuvistors at this frequency, and in all the stages, nuviistor like an indulgence, but it means that the resulting converter is neat and compact as is illustrated below.
Some useful links are at: Transliteration of the Russian Cyrillic alphabet.
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. The history of TW Electronics was published in Practical Wireless for Septemberand a scan of this article can be found here. Basing of the Nuvistor, photopin-outbase drawing. As you can see the Nuvistor is considerably smaller than the 6AF4A.
The lower power requirements of Nuvistors when compared to ‘conventional’ valves help extend the life of the sonobuoy in the water, when of course it is operating from internal batteries. The is a medium mu triode. The Nuvistor was the final evolution of the thermionic valve as a general purpose active circuit element. 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 Heater power of less than 1W was achieved for most Nuvistors, and with typical anode voltages in the range V and even lower in some specialised applicationsHT power consumption could also be kept low.
7586 NOS Vacuum Tube Jan RCA Nuvistor
The technical excellence of Nuvistors and powerful branding by RCA helped ensure a long design-in life for the technology. The VF was used in the war in portable field radios, and was not manufactured after the war, and suitable valves were selected from what limited stocks still existed.
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 nuvvistor primarily nuvixtor RF sections, and oscilloscopes.
Wikimedia Commons has media related to Nuvistors. So as not to obsolete their equipment the manufacturers of valve testers introduced adaptors as new valve types, such as Nuvistors emerged. Nuvistor Internals Inside view of a 6CW4, after a narrow ring of the case had been ground away so that it could be lifted clear.
I’m not sure how prospective constructors could get hold of the special socket for their Nuvistor, so this was a challenge in itself. All the pins have a diameter of 0.
In other projects Wikimedia Commons. It’s interesting that the Mullard nuvietor seem to correspond exactly to the internals of the RCA-manufactured valve. I can only conclude that the quality of the vacuum created inside the Nuvistor was very good indeed, without the need for a getter-type process step.
NOS Tube Store: RCA Nuvistor
Mullard’s exploded view of the Nuvistor triode and its component parts. The standard triode MT4 metal shell case is shaped like an upside-down thimble, but at about 20mm high and 11mm in diameter is somewhat smaller. These are small floating platforms equipped with sensors, both active and passive, often dropped from surveillance aircraft, which float above potential submarine targets for some time, relaying the results from their sensors back to the nuviztor aircraft. Readers’ comments as to whether this is true would be welcome.
The circuits were crude by today’s standards – they contained several transistors and a few resistors, but they were the first step on the road that has led to billions of transistors now being regularly deposited onto a single silicon chip. If you search for ‘nuvistor project’ on Google you’ll get lots of hits for audio and radio projects that you might want to build. Use in Sonobuoys The RCAand triodes, and power tetrode, were designed to operate in sonobuoys. Nuvistors were also found in some high quality broadcast radios.
The diagram nuvustor shows an extract from RCA’s datasheet for the 6CW4 showing the physical construction and dimensions. From the date of this advert, the picture is probably an artist’s impression of a Mercury mission.
When I first started researching this article, my assumption was that TV tuners were the intended and most significant use for Nuvistors, as many Internet-based descriptions seem to indicate. The ceramic base is huvistor 10mm in diameter.
The Nuvistor is often regarded as a last desperate effort by valve manufacturers to stem the flow of ‘transistorisation’ which was becoming a torrent by this time.
The way the ‘long’ and ‘short’ pins protrude through the ceramic base wafer can be seen. The small physical size of the Nuvistor case meant that the heater power had to be kept as low as possible, but this diminutive size also meant that the cathode was small and so less power was needed to coax it to emit the electrons needed for operation.