Economics edexcel international gcse maths a 91 international advanced level chemistry specification pearson edexcel international advanced subsidiary in chemistry xch11 pearson edexcel international advanced level in chemistry ych11 first teaching september 2018 first examination from january 2019. Ef80 datasheet, ef80 pdf, ef80 data sheet, ef80 manual, ef80 pdf, ef80, datenblatt, electronics ef80, alldatasheet, free, datasheet, datasheets, data sheet, datas. But i cant verify equivalence, although itll probably work. Ef800 tesla czechoslovakia rfifstage pentode goldpin etsy. Dy86 1s2 e88cc 6922, cca e180f 6608, 5a170k, ef861 eaa91 6al5 eabc80 dh719 6ld12, 6t8, 6ak8. 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. Lawrence berkeley national laboratory introduction. As the ef80 does not make a good rectifier, i included one other tube the az1. These are offered for the furtherance of the readers knowledge. Capacitor input f 50 hz u tr eff 2x250 2x350 2x450 v r t 2x150 2x230 2x310.
I have a 648s special tube data booklet that came wirth the 648. This concept uses a resonant circuit, tuned to the central intermediate frequency of the fm signal where the antiphase signals at both ends v4 and v5 are each peakdetected by a diode and their outputs subtracted. It is very similar electrically to the octal base ef37a and the rimlock base ef40. Mullard film showing valve manufacture in the 1950s. The fact that it is e80cc rather than ecc80 means it is a better quality tube im told. The ef50 rf penthode constitutes a landmark in the history of the radio tube. Ef806s6267ef86 are the same tube electrically and pin compatible, ef40 is the predecessor that uses a 8pin rimlock socket. Before the introduction of the eq40 as fm detector, the only practical method for fmdetection was the fosterseeley frequency discriminator. Ef80 6bx6 nos siemens halske tube for darkvoice 337s ebay. Tube ef 80 or rohre ef80 id709, vacuum pentode, noval, b9a and rfifstage shown.
Svetlana ef86 highperformance audio smallsignal pentode t. Downloads, supreme instruments manuals, tube data, and. Xray properties of elements electron binding energies xray energy emission energies fluorescence yields for k and l. E80f is pin compatible, has slightly less slope and g2g1 mu is 25 ef86 is 38. A friend moving out of town cleared his attic and gave me a box of 50 electron tubes, among which there were 18 of type ef80. I tried it with the 648 and several tubes seemed to test ok with this data. Anyone using e80f or 6084 instead of ef86 the gear page. This and the sheer unlimited availability of tube data. The ef50 in contrast had, like all modern radio tubes, a. It was introduced in the late 1950s and was produced by philips, mullard, telefunken, valvo, and gec among others. Due to special manufacturing the working life compared to normal types is greatly extended, also the tube is. Actual tubes were tested on the stateoftheart amplitrex at electron tube. This inspired a radiobuilding project, aimed at constructing a radio containing ef80 as the only tube.
The ef86 is a high transconductance sharp cutoff pentode vacuum tube with noval b9a base for audiofrequency applications. I was not able to get the visual green glow on the tube face although the other test. E80f is nominally an rf tube that happens to work well in audio frequencies, so by nature it has a much wider frequency range than an audio only tube because it has to be able to operate at very high frequencies. They found that the magnitudes were consistently much smaller. A clean copy of the physics data booklet is required for this paper. Using the information from table 10 of the data booklet, determine the theoretical enthalpy of combustion of methanol. Developing a model to describe those tubes like the ech81 and the ef80 with g3 as modulation grid is not possible based on the available data sheets, as those provide. Also see 7643e80cf mcintosh mr67 tuner to buy 7643 amperex e80cf7643 amperex germany pq nos made by valvo hamburg germany original boxes 19611966 recommended pairs e80cf.
The ef80 was much used for rf, intermediate frequency, and video amplification. International baccalaureate organization 20 19 m194physi sp2eg tz1xx 2219 6511. The ef80 internally screened pentode was a workhorse of the vhf tv receiver and was introduced in mid 1950 to replace the ef91. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Ef83 6bk8 is pin compatible to ef86, however, it is a varimu tube. For instance e80f differs a lot from ef80 while premium ef80 is ef800. The maximum mark for this examination paper is 50 marks. Ef860 ef80 pentode em80 tube 6dj8 tube em84 tube el500 ecl86 1t4t ecc189 text. When this is done, the resulting triode is among the lowestdistortion electronic amplifying devices ever made. Svetlana ef86 highperformance audio smallsignal pentode he svetlana ef86 is a glass envelope miniature pentode intended for highquality audio preamplifier service. This data booklet deals with grundfos heavyduty sewage pumps called s pumps, range 70. An increase in intensity in the sound is heard for the first time when the air column length is. With almost datasheets and the visitor counter indicates over 4000. The maximum mark for this examination paper is 40 marks.
Introduction introduction this data booklet deals with grundfos submersible wastewater and sewage pumps, types sl1 and slv. Typical secondharmonic distortion with 10v rms output is on the order of 0. Answers must be written within the answer boxes provided. E80cf7643 amperex pq telefunken 6bl8 substitute the e80cf is a special quality mediummu triodepentode. Domestic receiving tubes and their foreign counterparts by. Full presentation of two sided data booklet from 1935.
Initially used in television receivers, it quickly gained a vital role in british radar and great efforts were made to. Before the ef50, all radio tubes were fabricated using technology which was directly derived from the technology for making light bulbs. Also, mixing and modulation tubes have a rich history, and spice models for these tubes are hard to nd if they exist at all. Description all tubes new in factory box, tube have gold pins. Pearson edexcel level 3 advanced subsidiary and advanced. In the field of electronics, the ef50 is an early allglass wideband remote cutoff pentode designed in 1938 by philips. About the item ef800 rfifstage pentode tube made during the 60s by tesla, czechoslovakia the ef800 is an upgrade for ef80 same data, same capacitance values, etc.
Receiving tubes and foreign equivalents data collected from the russian book. Pdf r02n0v, developme82 6u10n pabc80 pcc84 pcc85 pcc88 pcc189 pcf82 pcf200 beam tube 6l50 ef860 ef80 pentode em80 tube 6dj8 tube em84 tube. I also have a print copy its not scanned to pdf, at least not yet of the eico 628 tube data booklet, 33pages, dated 1176. Ef80 with g3 as modulation grid is not possible based on the available data sheets, as those provide very little detail and only refer to what from a practical perspective was needed to design a circuit. The published circuit diagrams of station qrp are for educational purposes only.