A different construction of the classic el34 tube that offers a different tonal palette than the original. To get the needed voltage drop from the 250 volts supply i decided to go for a ccs. For the price i paid for it, i took the chance not knowing a whole lot about tube testers in general. This video explains how to use the ef database section within the client file. Ac2 triode for use as af amplifier or as oscillator together with an ah1. We have 1 comtech ef data x manual available for free pdf download. This is a list of vacuum tubes or thermionic valves, and lowpressure gasfilled tubes. 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 screen grid, again of thin wire, is a flat sided helix. The thin glass tube envelope is 17 mm in diameter and, excluding the b7g base pins, is 47 mm tall. It was introduced in the late 1950s and was produced by philips, mullard, telefunken, valvo, and gec among others. The specification of the brimar 6am6 from 1952 can be seen by following the link to the exhibit, note that the sheet indicates that the valve was previously coded 8d3, so it looks like the rebranding away from the 8d3 was complete by this date. This is a list of european mullardphilips vacuum tubes and their american equivalents.
Close manufacturing specification tolerances and improved processing provide improved reliability and. Complete tube data is in every single box, like big transmitting us wwii tubes. An input impedance of 10 meg ohms, an output impedance of 4. The jj el34 ii is stronger than the original but not harsh sounding in any way. I just bought a eico model 625 tube tester and the guy i bought it from said that the model 625 testers dont need to be calibrated. A flat sheet beam is electrostatically deflected across the anode which is.
Vacuum tube 6686 e81l, pentode, power amplifier antique. E98 file extension what is it and how to open e98 format. In addition, listed below are some other important safety. It may be that 8d3 was regarded as being an oldfashioned code whereas 6am6 projected a more modern image. Comtech ef data x installation and operation manual 86 pages hpod highpowered outdoor amplifier. Unlike many pentodes it was designed specifically for audio applications. This beacuse a plate resistor would translate in a max value of 10 kiloohms with. Create file catalog drive catalog generator organize data manager organize organizer creator. Description the 6s3p 63 highfrequency triode is designed for amplification of highfrequency voltage. All tubes new, military equipment and have otk mark. I have more than 100 pieces, most of them were made in 60s and 70s, this batch is from 1962.
Svetlana ef86 highperformance audio smallsignal pentode t. 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. It is very similar electrically to the octal base ef37a and the rimlock base ef40. At this moment we do not have any description or further details of the e98 file type, but we may be able to recommend some programs that will be able to open such files. Close manufacturing specification tolerances and improved processing provide improved reliability and superior sonic performance. This section will display ef data if you use drake, taxwise or crosslink tax p. Biased at 2 volts and running at 100 volts means about 14ma plate current which suits my power transformer. Its convenient, looseleaf form permits the revision of data on existing tubes and the addition of data on new tubes as they are made available.
Svetlana ef86 highperformance audio smallsignal pentode he svetlana ef86 is a glass envelope miniature pentode intended for highquality audio preamplifier service. The information contained on this website is for information only. The final grid is placed halfway between cathode and anode and is of a much looser pitch than the other grids. Mullard introduced the valve in 1952 as a direct equivalent to the american 6ak5. Its convenient, looseleaf form permits the revision of data on existing tubes and the addition. The thin glass tube envelope is 18 mm in diameter and, excluding the b7g base pins, is 46 mm tall. With a classic design i mean a smaller valve for voltage amplification and a power valve driving the output transformer. A few specialquality tubes did not have a standard equivalent, e. The renown of our book through out the world allows this introduc tian to be a short one. It is important to read and follow all instructions shipped with the products. Tube ef 92 or rohre ef92 id18604, vacuum pentode, and shown.
The tube is manufactured by the oktjbr, vinnitsa, ukraine. The oc16 transistor was released by philips in 1958 and was commercially successful, however it was superseded by other types in to3 cases which had better power handling capacity. Please see the substitutes at the top of the page for more details. Xray properties of elements electron binding energies xray energy emission energies fluorescence yields for k and l shells principal auger electron energies. Bold designators are close or identical, italic designators are different ratings, different pinouts or different filament voltages. 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. Practical wireless components list pushpull amplifer fig. This brief article describes a radio crafted from low anode voltage valves and a germanium audio output transistor. Use keywords to find the product you are looking for. W hat started out as a classic single ended design transformed into a very good amplifier. Antique radio forums view topic eico 625 tube tester quetion. Every day thousands of users send us information about programs they open different file formats with. Who should read this documentation this guide is written for people who enter and modify data, search for information, run predefined reports, and carry out other daytoday tasks to manage data in a custom. The ef86 is a high transconductance sharp cutoff pentode vacuum tube with noval b9a base for audiofrequency applications.
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. Tube ef 98 or rohre ef98 id1918, vacuum pentode, miniatur7pinbase b7g, usa 1940 and rfifstage shown. This handbook of data on all rca tubes has been compiled to meet the requirements of electronic engineers for tube information which can be kept uptodate. Click to see all 6sn7 6sn7gt 12sn7 12sn7gt in stock. Nov 22, 2015 this video explains how to use the ef database section within the client file. Aluminuim spinner in the pnf format the efxtra will still. The jj el34 ii has an increased low to lowmid end with plenty of headroom to spare.
The ef98 amplifier pentode from mullard was designed for if amplifier use in vhf car radios. He said to change the 6h6 tube, resistors and cap up to specs and it will work like new. With almost datasheets and the visitor counter indicates over 4000. The cathode is a flattened tube, g1 is closely wound and very near the cathode. The ef95 is a low noise rf voltage amplifying pentode, designed to operate at vhf. Lawrence berkeley national laboratory introduction. El80 el80 is a peroxidecure, highstrength, gray silicone rubber. Antique radio forums view topic eico 625 tube tester.
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