12sr7 tube data book

Although originally marketed as pentode tubes for use in early television receivers, they found additional uses in audio and radiotelephone equipment. The current production svetlana is a new sensor product and is a member of 12ax7eh and tungsol 12ax7 family. This 1932 rca below manual provides all the data sheet information, of the first radio receiving tubes ever made, from about 1920 to 1932. Welcome to the tube data sheet locator, a popular web resource for finding data on vacuum tubes. The mutual conductance values listed are averages for new tubes and only for a guide. A compactron used in television sets to supply power to the anode of the picture tube. Tubes in the tube column are directly replaceable with tubes in the replacement column. In my listening experience, these 12bz7 are very, very clear articulate, and tend to. All 12at7 ecc81 6201 cv4024 12au7 ecc82 cv4003 5814 12ax7 ecc83 cv4004 5751 6922 6dj8 7308 pcc88 6sl7. This tube is very rare, and very special, because it implements an indirectly heated cathode, not connected to the filament. You can use the search to find service types or go to the service type lists that you can access from the page more tube related stuff. Muticolor vacuum tube shield aluminum alloy 9g55 shield caps for 9 pin 12ax7 12au7 12at7 tubes pack of 5. Ef860 ef80 pentode em80 tube 6dj8 tube em84 tube el500 ecl86 1t4t ecc189.

Four whiz kids set out to foil the plans of a mad scientist in this early reader series. The tube list at esrc1 vacuum tubes is very extensive, as is our inventory of vacuum tubes, grid caps, sockets, valves and capacitors. The 12bv7, 12by7, 12by7a, and equivalents were a class of mediumlow gain, pentode vacuum tube amplifiers using the noval socket configuration. In many cases, these tubes are interchangeable and can easily be swapped. Key data and drawings are shown below, or you can download the 12ax7 datasheet in pdf format.

The tube list at the tube center is very extensive, as is our inventory of vacuum tubes, grid caps, sockets, valves and capacitors. This is a list of vacuum tubes or thermionic valves, and lowpressure gasfilled tubes. It has much higher transconductance, and much lower dynamic plate resistance than a 12ax7. Rca and sylvania first introduced the 12ax7 to the world in the late 1940s. The 12ax7, 12at7, and 12au7 all belong to the same family of nine contact, twin triode tubes. The 6u5 should be used as the replacement tube for type 6t5, type 6h5 and type 6g5. The tube is quite pokey and sections can even be connected in parallel to create a. But if it is microphonic, it may still be a fun tube to try in your phaseinverter position if youve got a 12ax7 there now microphony will not be a problem in the pi. Pdf ett1027 gl64 gl64 6ac7 6ac7 tube ett1027 amplifier circuit diagram 20000 watt tube 6ac7. To search for tube data, simple click the search link on the left. Interesting tube discovery ecc83212dw7 volume reduction.

The 1959 book lost some older tube data, and some of the good info in the appendix, but gained a bunch of picture tube crt data, modern tv tubes, as well as some other odd info like crystal diode data. Try this tube for some interesting gain reduction effects on certain amps. It has many circuit diagrams, using these tubes and all the information, about these original vacuum tubes. Tube type list the following list shows the tube types i have entered in my database, with exception of the service types e. Double triodes of the 12au7 family have a centertapped filament for use in either 6. If the page is blank click here rca 6fq7 6cg7 datasheet. Some datasheets are only one page 3050k, some are 810 pages 300k and more. The 12ax7 is by far the best known preamp tube among guitar players. In addition to the data i have scanned and posted, if youre looking for data on a particular tube you should visit tsdl on duncanamps website, or franks tube data. Svetlana 12ax7 for several years the original svetlana 12ax7 tube from st. Herein you will find a collection of vintage engineering texts, vacuum tube datasheets, and other obsolete information, presented free of charge and without annoying advertisements. List of vacuum tubes wikimili, the free encyclopedia. A centertapped heater permits operation of the tube from either a 6.

Today, it is by far the most common preamp tube used for electric guitar amplification and there is an almost overwhelming supply of. The diodes are for am signal detection and agc detection whilst the triode section is for first audio amplification. As of 2012 update the 12au7 continued to be manufactured in russia, slovakia jj electronic, and china. I dont know if this works on all amps, but it was a successful way to reduce the volume on the bassman while retaining good tonal character. Tube 12sr7 or rohre 12sr7 id5445, double diodetriode, octal int. If you have never used this facility before, click the help link on the left for detailed instructions. Buy 12sr7 vacuum tubes online, in stock and ready to ship. This tube finds use as a phaseinvertersplitter in pushpull amplifier circuits in acdc radio equipment and in many diversified applications such as multivibrators or oscillators in industrial control devices. I had a heathkit nixie tube frequency counter when i was a kid, plus the numitron calculator and the clock too.

The 12sq7 is a double diode triode with heaters designed to operate from the 12. New listing 12sn7gt tube, rca in original box, new old stock, tests good. All information is deemed reliable but not guaranteed. This tube is about a halfinch taller than the standard 12at7, so chassis space is an important consideration. To prevent damage to equipment, it would be wise to double check with a good tube manual before actually doing a substitution. All of the other tubes used in older ampegs, like the 6k11, 12dw7, 6cg7, 6sl7, 6an8a, etc, are still widely available either as nos or currentproduction items. I have more than 100 pieces, most of them were made in 60s and 70s, this batch is from 1962 complete tube data is in every single box, like big transmitting us wwii tubes. In the cases tabulated below there are more than one valve for a given vt marking.

I177 series tube tester settings data antique airwaves. Tube data in addition to the data i have scanned and posted, if youre looking for data on a particular tube you should visit tsdl on duncanamps website, or franks tube data. An industrial, computer rated dual triode, virtually the same specs as the e180cc or 7062 listed above. One side has a gain factor of 100 the other side has a gain factor of 20. The 12sr7 differs only in heater voltage from the 6sr7. Follow the links on the left to find the tubes, valves, sockets, grid caps, and capacitors for your antique radio, ham radio, hifi stereo, or other electronic piece. The r23 and r24 are considered navigation receivers and have the same design and circuit diagram. Barczynski, who offered me a lot of diskspace online, i can put all my datasheets on the web. The 1943, 1949 and 1959 sylvania tube manuals online. That distinction probably falls to the 12ax7, especially whe.

This amperex branded 6679 was made in in eastern europe and is an excellent value in the 12at7 tube category. Pete milletts diy audio pages for technical books, tube data, vintage data, transformer data, and mcintosh data, go to. The type 12sr7 is a duplex diode mediummu triode amplifier designed for use as a combined detector, audio amplifier, and auto. The thin metal tube envelope is 25 mm in diameter and, excluding the io base pins, is 52 mm tall. Due to coronavirus covid19 we have limited staff working on location. Antique radio forums view topic 12sr7 subbed for 12sq7. Tube 12sg7 or rohre 12sg7 id2636, vacuum pentode, octal int. Another spot to look, which is especially useful if youre looking for replacement types and tubes with similar bases or characteristics, is the nj7p tube database.

Due to the numbering schemes in use there are three variant classifications of vtxyz valves. The probability analysis of texas holdem paperback book. What is the difference between the 12ax7, 12at7, and 12au7. The type 955 triode acorn tube is a small triode thermionic valve vacuum tube in usa designed primarily to operate at high frequency. You should also be aware that any good 6l6 family tube, including the 7581a, 6l6gc, kt66, etc. Tube 12sf7 or rohre 12sf7 id2822, diodepentode, octal int. 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. Free vacuum tube data sheets free vacuum tube substitution. This tube is essentially two 6c4s or two ec90s in the same envelope.

It is a more rugged build, with the raytheon blackplate type sporting. This list was compiled from the cv register and several other sources. No data is found on this tube, except for the filament power which is 3. The 12sr7 is a double diode triode sharing a common cathode. Compared to the pin compatible 6sq7 this valve would exhibit lower gain in the triode stage. A quickshot, 3 tube, 12at7 shootout by steve graham the 12at7 is not the most commonly used preamp tube in audio. Bill beechs online tube data from mostly rca manuals. We will take a look at why you might, or might not want to swap out the different types of tubes. Petersburg winged csed tried to develop a good 12ax7 and mostly failed. A few specialquality tubes did not have a standard equivalent, e. You can give them a try, but if you dont like a 12at7 subbed in whatever position you try, you will probably not like the 12av7. The rca 12sq7 was first manufactured in 1939 and manufacturing for this prolific tube continued through the 1960s, therefore you can get tubes from many different years. Far exceeding thquality of any 12at7 tube being made today. Tube test data for use with the tube testers i177, i177a, and i177b note f.

In a few cases, when the 1966 edition omitted graphics on obsolete tubes, i inserted scans from the 1948 ginkins reference book. This tube, known for its high quality, was originally used for radio and television reception and has stood the test of time. Electrically and physically, the gl64 is a replacement for the 6ac7, tube department general electric schenectady 5, n. Tube type selector switch filament potentiometers socket letter press notations data source a b l r 00a 5. March of the mini beasts, dont disturb the dinosaurs, the sky i.