Created with the purpose of making purchasing electronic components easier, faster, and more cost efficient. Neumann u47, u48 and u67 microphones were originally used by the beatles for their 1960s concerts and recording sessions. Solid state direct replacement modules are much more efficient than their vacuum tube predecessors. Thanks to max, the chance i have it, has increased considerably. This is a list of vacuum tubes or thermionic valves, and lowpressure gasfilled tubes, or discharge tubes. 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. Ef85 ef85 ef86 ef86 ef86 ef86 ef89 ef89 ef89 ef89 ef9 ef9 efl200 efl200 efl200 efl200 efm1 efm1 eh2 eh2 eip12 eip12 ek2 ek2 ek3 ek3.
Mar 29, 2014 this is my homebrew tube superheterodyne tuner covering the am broadcast band 5201670 khz ech816aj8 frequency converter ef966ba6 if amplifier 6n2p audio stagecathode follower em806br5. Key data and drawings are shown below, or you can download the 12ax7 datasheet in pdf format. Drawing on almost 50 years of experience in the procurement of passive components, microfarads enables the buyer to make better decisions to get parts when needed and at their desired cost. Ech81 tube ech 81 tube ech81 ech 81 philips ef 85 ebf80 amplificateur hf philips oszillator ech 42. This exhibit was made by mullard who designed the ef86. It was first shown at the 1953 radio show and first used in their 510 amplifier from 1954. Biased at 2 volts and running at 100 volts means about 14ma plate current which suits my power transformer. Pentode with variable mutual conductance for use as wideband amplifier, screengrid resistor of ef 85 and ech 81 as frequency changer.
The triode is the oscillator and has to produce 5 v pkpk signal. Unlike many pentodes it was designed specifically for audio applications. To get the needed voltage drop from the 250 volts supply i decided to go for a ccs. Many industrial, military or otherwise professional tubes were also produced. In most cases the tubes manufactured to the european system have an exact equivalent tube in the american system and vice versa. The tube is manufactured by the oktjbr, vinnitsa, ukraine. The premier online independent passive component distributor. Before the advent of semiconductor devices, thousands of tube types were used in consumer electronics. Brimar data sheets show this triode pentode valve as designed for vhf frequency changer use.
Also see 7643e80cf mcintosh mr67 tuner to buy 7643 amperex. The thin glass tube envelope is 20 mm in diameter and, excluding the b9a base pins, is 60 mm tall. Franks electron tube pages foreign substitutes for american types this data is scanned and may contain errors caused by the ocr software. Within the mesh screen can be seen the suppressor grid with the two small anode plates on the left and right of the image. Close manufacturing specification tolerances and improved processing provide improved reliability and superior sonic performance. Ef85 ech 81 philips ech81 ech 81 ef85 philips hg1 ko et 81 k tube ef85 ef85 tube text. So youll need a more complete data sheet, and probably some investigation of the curves to find gm of each tube at the same operating point. Close manufacturing specification tolerances and improved processing provide improved reliability and. The tube is useable in vhf television and radio, sw, fm receivers.
Svetlana ef86 highperformance audio smallsignal pentode he svetlana ef86 is a glass envelope miniature pentode intended for highquality audio preamplifier service. Ef85 sharpcutoff pentode telefunken vacuum electron tube. This is a list of vacuum tubes or thermionic valves, and lowpressure gasfilled tubes. All tubes new, military equipment and have otk mark. Mullard say that the ecf80 was designed for operation up to 220 mhz. These anode plates are joined by thin metal straps top and bottom. Basics how does a tube work vacuum tube electrodes diode valve tube triode tetrode beam tetrode pentode equivalents pin connections numbering systems valve sockets bases.
U a 250 v u g2 250 v u g1 7,3 v i a 48 ma i g2 5,5 ma s 11,3 mav. This beacuse a plate resistor would translate in a max value of 10 kiloohms with. Noval u f 6,3 v i f 0,760 ma typical characteristic. This data is scanned and may contain errors caused by the ocr software. Since tubedepot is in memphis, tn, the home and main hub for fedex and usps, we get very good rates, so rest assured your heavy item will be shipped at the most affordable rates. However when the anode voltage drops much below the g2 voltage usually fixed at 12 ht, ht or via a resistor to ht there is a point where the voltage current curve is negative a kink due to. Data sheet supersedes data of september 2004 2008 sep 01 ferroxcube efd20107 efd cores and accessories. The ef86 is a high transconductance sharp cutoff pentode vacuum tube with noval b9a base for audiofrequency applications. This is an original telefunken ef85 sharpcutoff rf pentode electron tube. Thanks to frank philipse for supplying the above pdf datasheet. E80cf7643 amperex pq telefunken 6bl8 substitute the e80cf is a special quality mediummu triodepentode.
We do not know these differences as the 3bs2b tube data is not available. Clearly this places the valve in a superhet context with agc applied to the rf and if sections. Free shipping is limited to the contiguous 48 states. This is my homebrew tube superheterodyne tuner covering the am broadcast band 5201670 khz ech816aj8 frequency converter ef966ba6 if amplifier 6n2p.
Ef85 sharpcutoff pentode telefunken vacuum electron tube rf vhf. The thin glass tube envelope is 20 mm in diameter and, excluding the b9a. Aaron cakes circuits schematics and printed circuit board patterns, plus. All tubes exhibit higher gm at a higher plate current.
Most vacuum tubes are n ew in original boxes new arrival. Tube 7025 or rohre 7025 id3942, double triode, noval, b9a and audio frequency shown. W hat started out as a classic single ended design transformed into a very good amplifier. Franks electron tube pages american substitutes for foreign types this data is scanned and may contain errors caused by the ocr software. The ef86 for example is used in my old ac10 amplifier for the tremolo channel input gain stage and has an amplification factor of 38 whereas the ef84 has an amplification factor of 60 and looking at the datasheets they have a totally different pinout cheers marty, as you already know the preferred choice of valve is the 12ax7 which has an. All information is deemed reliable but not guaranteed.
The ef85 is a great general purpose, wideband pentode. Notice the 7199s gm number is while the tube is passing 12. The ef86 is the standard early stage audio preamplifier valve. Technical data sheet ef24as2 rotary actuator failsafe for adjusting dampers in technical building installations air damper size up to approx. Svetlana ef86 highperformance audio smallsignal pentode t. 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. Tube ef 89 or rohre ef89 id841, vacuum pentode, noval, b9a and rfifstage shown. With the very large number of vacuum tubes or thermionic valves that were produced and as a result of the multiple vacuum tube numbering systems that were in use, there are generally equivalents for most types of tube. Which can be a substitute for the 7199 only pentode. Tube ef 85 or rohre ef85 id357, vacuum pentode, noval, b9a and rfif stage shown. Information or data about vacuum tube or thermionic valve pin connections is always useful to have to hand. With a classic design i mean a smaller valve for voltage amplification and a power valve driving the output transformer. It is very similar electrically to the octal base ef37a and the rimlock base ef40.
This would be mainly for radio as television receivers tended to use the pcfnn 300 ma valves. The full mullard data sheet is available by clicking the valve name at the top of the page. With the wide variety of tubes that are in use there are many. Its design is low noise and antimicrophonic and was developed from the b8a ef40. Only a few types are still used today, mainly in highpower, highfrequency applications. An rfaf pentode is useable for many other circuits, oscillators and amplifiers.
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