One of the probable reasons you dont see many nuvistor based. Gec, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. For use as groundedcathode, neutralized rfamplifier. Oct 01, 2015 y2010dn datasheet pdf, y2010dn datasheet, y2010dn pdf, y2010dn pinout, y2010dn data, circuit, ic, manual, substitute, parts, schematic, reference. Conrad johnson used two 6cw4 nuvistors in their hv1 and hv2 phono pre amps in the 1980s. Most of these datasheets are in english except where noted otherwise. The nuvistor is a thimblesized vacuum tube enclosed in miniature metal rather than glass that promised highreliability, lownoise, and lowpower operation. I used to have access to the handbooks of the 60s and early 70s. Unlike the transistors of the time the nuvistor had the overload and intermodulation characteristics of the valve, superior to the transistor. The thin metal tube envelope is 10 mm in diameter and, excluding the fine base pins, is the 20 mm tall. As well as use at vhf in radio equipment the nuvistor was used for wideband y amplifiers in oscilloscopes and the the high gm value is. Twin diode for fullwave powerrectifier applications, 6ca4 datasheet, 6ca4 circuit, 6ca4 data sheet. Infamous 7586 nuvistor type mediummu triode designed as amplifier or oscillator at frequencies extending into the uhf region great tube for low level audio, perfect for newbs because of wide plate operating voltage at a plate voltage of 75v, amplification factor 35 at a plate voltage of 26.
The nuvistor is a real ceramic tube without glass, made in a vacuumized surrounding for not having to pump out and seal a tube. Nuvistors were the last born in the classic tube world. Unfortunately for tube aficionados, the release of the nuvistor appeared at the same time as the announcement of the first integrated circuit, and its fate was all but sealed right from the start. Jan 21, 2009 my guess about absence of a nuvistor power amplifier that it is does not give enough power, there are many other tubes, more suitable for it.
I remember the amateur radio handbook from the late 60s had. Datasheet of gps smart antenna module, ls200303 1 introduction ls200303 series products are complete gps smart antenna receivers, including an embedded antenna and gps receiver circuits, designed for a broad spectrum of oem system applications. The short pins are shielded by the substantial location lugs. The tuner of a ctc11, showing the 6ea8 oscillatormixer and 6cw4 rf amplifier valves, can be seen above. Consider the nuvistor two meter converter and the nuvistor pre amplifier, described respectively in the may, 1961, and september, 1961, issues. Rca also manufactures 7 other nuvistor tubes types 2cw4, 6cw4, cw4. The datasheetarchive datasheet search engine author.
The 6cw4 nuvistor from rca is a triode for use at vhf and built into a small metal case. The 6cw4 nuvistor was a metal can tube about twice the size of a to5 transistor. Apr 04, 2015 4n60 datasheet pdf 4n60 datasheet pdf 4n60 datasheet pdf download. Nuvistor types rca7586 and 7587 were operated in a 15kc amplifier circuit and monitored. Substitutes are given as a guide only please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application. Duncans amp pages are brought to you by duncan amplification. In at least one case the 422, jfets can be plugged directly into the nuvistor sockets with no further circuit modification, and proper function of the scope is restored. Most nuvistors are basically thimbleshaped, but somewhat smaller than a thimble, and much smaller than conventional tubes of the day, almost approaching the compactness of early discrete transistor casings. The fingers will provide better screening in an rf environment. The utc 4n60 is a high voltage power mosfet and is designed to have better characteristics, such as. A 7586 nuvistor in common cathode and automatic cathode bias configuration, without any cathodic bypass, drives another common plate cathode follower 7586 nuvistor tube. Above, left, is an example of the first released nuvistor type, the 7586, manufactured by philips at eindhoven and branded mullard for the u.
It was a superregenerative receiver and it switched over. In addition to small size, low heater power, rugged construc tion, and low lead inductance, the nuvistor. As well as use at vhf in radio equipment the nuvistor was used for wideband y amplifiers in oscilloscopes and the the high gm value is required for wide band width use. Akg used a 7586 nuvistor in the c12a mics and a rca 7586 nuvistor in the c61 mics. Thanks to frank philipse for supplying the above pdf datasheet. Rca nuvistor series the vintage technology association. Nos tube specification sheet nos tube specification sheet.
Use in the audio studio one famous audio application of the nuvistor was in the mids ampex mr, a costly studiograde 1inch 4track tape recorder whose entire electronics section was based nuviztor triodes and pushpull pairs of tetrodes. Look at the online circuits listed below, and see if you or one of your friends have any of the older print articles listed after the online articles. The product is based on the proven technology found in locosys 32 channel gps. The top of the can has the type designation stamped into it. The best way to get a sense for spacecharge tubes is to study some real circuits. Back in the old days this tube was found in the front end of damn near every uhf tv tuner in the us. Tube 6cw4 or rohre 6cw4 id3728, triode, vacuum, nuvistor and uhf shown. Mc, and as an oscillator tube having military specification mile1 97a excellent. Recent listings manufacturer directory get instant.
Rca nuvistor reference pdf detailed article on nuvistors. Find great deals for nos vacuum tube jan rca nuvistor. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. The 6cw4 isa highmu triode for use as a groundedcathode, neutralized rf amplifier. Certain articles, designs, software products, and graphic images presented or made available through these pages are proprietary andor subject.
Rca diagrams, schematics and service manuals download for free. Whilst the information contained in these pages is provided in good faith, no responsibility can be accepted for errors or omissions. Meets specification for class2 electronic equipment as covered in military specification mile5400g. The nuvistor is built as a series of coaxial electrodes but they are all very small. I made quite a lot of calculation based on the curves, and also quite a few tests, using other nuvistors, for example 6cw4 or the 8056 that is specifically a low. It has a lower gain 12 vs 68 for 6cw4, and a higher plate current at a lower voltage 9. The rationale behind using a 9pin envelope was that this allowed five pins usually pins 1, 3, 4, 6, and 9, evenly spaced around the base, and sometimes gold plated in later versions to be used to bring out the grid connection, keeping a very short and therefore low inductance connection to ground for this critical path in groundedgrid applications. The unique design enables these devices to meet the rigorous testing criteria of the iec 642standards. Radio corporation of america ffl electron tube division harrison, n. These nuvistors utilize the rca dark heater to insure long life and. Optocoupler, photodarlington output, high gain, with base. Construction refers to both basing size and the envelope hf means heater or filament voltage and current specifications. This is an even smaller creation, with a metal body on top of a ceramic base, as opposed to the glass bottle that housed subminiature valves.
They were more difficult to manufacture they were built by robots in vacuum but are capable of even better per. May 21, 2019 7586 nuvistor pdf tube or rohre id, triode, vacuum, nuvistor and universal shown. The vhfuhf tuner contained a b9a 6ea8 and the 6cw4. The 6cw4 features high gain capabilities which are achieved by very high transconductance and excellent transconductancetoplatecur rent ratio 12500 micromhos at a plate cur rent of 8 milliamperes and a plate voltage of 70 volts. And they are probably to hungry for heater current to have any use in battery powered radios. I remember the amateur radio handbook from the late 60s had a nuvistor tranceiver made from a single 6cw4. Competition to the transistor in this respect has been offered by the fairly recent nuvistor.
But i am a radioamateur, and try to build something from available materials and fave some fun in the process. As well as showing the electrical components in the tuner i think this view shows the mechanical complexity of the unit. Here youll find a modest collection of datasheets for some popular tubes. Rcas 1959 introduction of the nuvistor vacuum tube, heralded one of the attempts of tube manufacturers to hold onto a major portion of the smallsignal amplification market. Most of the datasheets are in pdf format and some are links to other html pages. Further triodes, such as the 6cw4 which is probably the most wellknown nuvistor and a tetrode or two followed over the next few years. Specifications for this tapper will be supplied on request. The thin metal tube envelope is 9 mm in diameter and, excluding the fine base pins, is 15 mm tall. Another repair option is to convert the circuit to use a transistor. This image shows a different type of nuvistor valve base.
The ctc11 used 25 normal valves and one 6cw4 nuvistor. An experiment on thermionic emission using a nuvistor triode an experiment on thermionic emission using a nuvistor triode luke, keung l. Although lower cost tube types may be used for v, and 172, only the 6cw4 provides all the advantages of small size, low power drain, and excellent performance. Rca2cw4, 6cw4, and cw4 are highmu triodes of the nuvistor type. Apparently the nuvistor was less finicky, so while the 417 and 416 which were expensive could be better, the nuvistor gave good results without as much tuning. In addition, two separate tubes provide better isolation and a more stable amplifier. One last note before im guilty of hijacking this thread.
Usb series varistors are designed to protect the high speed data lines against esd transients. Hhscott vacuum tubes 6cw4 6ds4 nuvistor applications. Vishay, disclaim any and all liability fo r any errors, inaccuracies or incompleteness contained in any datasheet or in any o ther disclosure relating to any product. Aug 23, 2019 7586 nuvistor pdf tube or rohre id, triode, vacuum, nuvistor and universal shown. Designed mainly for military and testequipment applications, the nuvistor bridged the gap between tubes and transistors. They have very low capacitance and fast turn on times that make this series ideal for data and transmission lines with high data rates. Types 2cw4 and cw4 are identical with type 6cw4 except for heater ratings. All these links open in a new browser window so that you can return quickly to this page without having to reload. Tnt preamble n diy nuvistor stereo preamplifier english. The 8056 is not electrically the same as the 6cw4 as one can read sometimes. The 7587 has many advantages over its older glass tube counterparts.
Id l high speed power switching l hard switched and high frequency circuits 650v 155m 22a l leadfree benefits d l ultra low gate charge qg results in simple. On the right is an example of an rca 6cw4 high mu triode. Utc 4 amps, 600 volts nchannel power mosfet,alldatasheet, datasheet, datasheet search site for. The 6cw4 is a nuvistor triode introduced in the late 1950s, originally designed for rf amplifier applications in tv and fm tuners. Mar 03, 2020 you may just be able to see the nuvistor logo on the valve itself. A few years later and there were jfets which were better, and maybe a decade later bipolar transistors that were better still. It was a small window where the nuvistor was great.
To date, ham tips articles on nuvistor applications have been concerned solely with receiving circuits. Im always on the lookout for some but it seems a lot of other people share my opinion and dont. Rca2cw4, 6cw4, and cw4 are highmu triodes of the nuvistor type, intended for use. Here is its data sheet from rca hb3 data library, 1961. Pdf 92cm11681 2cmi0524ri 6cw4 tube 6cw4 6cw4, tube no3 300b tube tube 300b harris e565. A 6cw4 nuvistor triode is used in an experiment which deals with the following aspects of thermionic emission. This is either a triode or tetrode valve of special design, which in the past was of americah origin, under the designation 6cw4.
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