Ef732 tube data book

For example, my amp uses 2 5687s, 6 6922s, and 8 kt88s. I want to share this experience and information with each other to create a blog that helps each other. Close manufacturing specification tolerances and improved processing provide improved reliability and. List of vacuum tubes project gutenberg selfpublishing. The mutual conductance values listed are averages for new tubes and only for a guide. Description the 6s3p 63 highfrequency triode is designed for amplification of highfrequency voltage. The ef86 is a high transconductance sharp cutoff pentode vacuum tube with noval b9a base for audiofrequency applications it was introduced in the late 1950s and was produced by philips, mullard, telefunken, valvo, and gec among others. This is the amalgamated data from three mullard data books from the late 20s to late 30s. The following list shows the tube types i have entered in my database, with exception of the service types e. Tube test data for use with the tube testers i177, i177a, and i177b note f.

The eht supplies were mainly derived from special mains transformers and ran at about 10 14 kv. Tube tests episode 16 neumann m249 m49 ac701 tube and. Unlike many pentodes it was designed specifically for audio applications. The complete western electric vacuum tube library books. The 5840 is the special quality version of the ef732 pentode. Another application area is as a microphone preamplifier built into condenser microphones. Battery types, ubiquitous before the 1930s but since then only for mobileportable equipment with a. I177 series tube tester settings data antique airwaves. Chapter 5 system unit microprocessor is the brain of the computer system has two basic component control unit arithmeticlogic unit tell the rest of the computer system how to carry out a programs instructions temporary holds data, instruction and processed information and. Buy 5 vintage raytheon s290ms001p003 5840 ef732 cv3929 premium. E810, 6as6 sm 4109 5636 tube ma 4108 sm 4108 5636 400c subminiature tubes tube 5636. Telefunken ela m 260 small diaphragm condenser tube. Telefunken elektroakustiks small diaphragm ela m 260 features a circuit design based around a premium nos new old stock ef732 vacuum tube and a custom output transformer. Receptor for emission frequency modulated fm control its electrodes are connected to the output.

It is a blog created to share various information with you in more complete and detailed contents. Im trying to update as much information as possible, even if i can not find perfect information. Document in this file telefunken tube data book display devices in this document. I love this as the modwright is a very quiet preamp, and i have come to expect the quiet passages of the music to be just that, quiet. I ve heard that they are very similar the ac701 triode valve was the result of. The 6s3p highfrequency triodes is are miniature devices enclosed in glass bulb and are provided with a ninepin base and an indirectly heated oxidecoated cathode. The ela m 260 is one of the finest acoustic and classical recording tube microphones, offering plenty of tone with exceptional detail and clarity. Looks of the 12a family but havent figured out what it. In use, the ela m 260 captures sources with a natural presence, making it a fantastic tool for recording acoustic instruments of all types. The 6e1p 6br5 em80 magic eye and other indicator tubes.

It is very similar electrically to the octal base ef37a and the rimlock base ef40. Ive heard that they are very similar the ac701 triode valve was the result of. To get the needed voltage drop from the 250 volts supply i decided to go for a ccs. We have gathered together technical data, tube inserts, patents, photos, and tabular data from a variety of original source documents in one convenient package. Electronic data and instruction by muhamad zahari on. This is a list of vacuum tubes or thermionic valves, and lowpressure gasfilled tubes, or discharge tubes. This is done in case of equal tube type numbers for different tubes.

This is a list of european mullardphilips vacuum tubes and their american equivalents. Tube type selector switch filament potentiometers socket letter press notations data source a b l r 00a 5. In the early days of crt based television the tubes could have been either electrostatic or magnetic deflection. The 5840 is the special quality, long life version of the ef732. 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. Mallory vibrator data book thyratron pl 21 microwave associates isolator international rectifier selenium rectifier national electronics ignitrons helipot 5000w audio amplifier selenium rectifier westinghouse helipot potentiometer. A first lesson for familiarisation and to learn some of the excel features. Svetlana ef86 highperformance audio smallsignal pentode he svetlana ef86 is a glass envelope miniature pentode intended for highquality audio preamplifier service. The underscore and these letters are not part of the tube type number.

Tube tests episode 16 neumann m249 m49 ac701 tube and ef732 the mic book and equinox microphones. I believe it covers all the valves mullard made for domestic receivers between 1925 and 1937. But first, id like to introduce you to lansdale with a brief company history, including our beginnings, our. This pentode uses lead out wires to the b8df base layout for direct soldering into circuit as the valve was considered to be as reliable as the rest of the components used in the design. This beacuse a plate resistor would translate in a max value of 10 kiloohms with. Svetlana ef86 highperformance audio smallsignal pentode t. Only those valves in current production, with full or half page data are listed. Why not use a ck5840 ck6502, ef72 or ef7321 tube to replace the ac701. They run extremely hot, making me think they may have a shorter life span. Before the advent of semiconductor devices, thousands of tube types were used in consumer and industrial electronics.

Valve reference books, equivalent tables and webbased resources. Valves still in production or stock for revalving are not listed here. Biased at 2 volts and running at 100 volts means about 14ma plate current which suits my power transformer. Most postwar european thermionic valve vacuum tube manufacturers have used the mullardphilips tube designation naming scheme special quality variants may have the letters sq appended, or the device description letters may be swapped with the numerals e. The ef732 is a special quality wide band hf amplifier pentode. The el38 was designed, in the late 1940s, as a television line output stage valve. This data book contains comprehensive data sheets and applications information on all of the new communications ics being produced at lansdale. Dieters nixie tube data archive this file is a part of dieters nixie and display tubes data archive if you have more datasheets, articles, books, pictures or other information about nixie tubes or other display devices please let me know. Vacuum tubes fall into three mainly noninterchangeable categories regarding their heater or filament voltagecurrent, though some tubes heaters run at both a standardized voltage and current, e. We are proud to offer our dvd book, the complete western electric vacuum tube library by james cross.