If youre lucky, you may get a relatively nonmicrophonic one. The summer propagation isnt as good as in the winter, so i switch to listening to tube sets more than the crystal radios. Nearly half a century of service to the service man tests picture tubes, too. Oct 24, 2011 6cs7 mediummu twin triode tube vt6cs7 6cs7 twin triode tube, new old stock, boxed. A plate resistance of 44kohm at an operating point of 250v2. The triplett 3444a, however, does test these with different parameters. Can the 7af7 be rolled in for a 6sn7 in any pre amp using the 6sn7 i currently use a blue circle bc. Etc, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors. Apr 03, 2012 i recently received an email from someone who built adapters to use 7f7 loctal tubes in place of 6sl7gts. Applications of the rca7199 triodepentode in highfidelity audio equipment. With this bv adapter, model 34 a tests every tube in a tv receiver, including the pic ture tube without even removing tube from receiver or carton.
Explore brimar d8 and discover alternative parts, cad models, technical specifications, datasheets, and more on octopart. From a pricing vantage point other than the one time purchase of the adapters there is a big difference in price for the tubes. Russian svetlana factory 5c8s is doubleanode full rectifier tube the tubes are never used. The 6n24p double triode is designed for amplification of highfrequency voltage in cascade circuits of radio equipment of wide use. Nos tube specification sheet nos tube specification sheet. This is a list of vacuum tubes or thermionic valves, and lowpressure gasfilled tubes. Are there any equivalents for this tube that were manufactured specifically for hifi, even if the equivalent resides in two separate envelopes.
With almost datasheets and the visitor counter indicates over 4000. This note describes the special features of the rca7199 triode pentode, and discusses its application in hifi audio equipment. The wide glass tube envelope is 27 mm in diameter, and excluding the b8b base pins is 53 mm tall. The obvious differences are the pinouts loctal vs octal. Typical radio receiver and amplifier circuits 1 2 3 4 5 6 7 8 9 10 11 12 14 15 16. Numbers shown in light blue background are coldcathode tubes.
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. Bold designators are close or identical, italic designators are different ratings, different pinouts or different filament voltages. A sylvania jan 7f7 loctal with its close relative, an rca jan 6sl7gt. Ge essential characteristics, the whole 228 page book in an indexed pdf file big, 11mb. As of 3505, i have finished scanning the general section, receiving tubes part 1, receiving tubes part 2, miscellaneous, specialpurpose receivingtype tubes, thyratron, ignitron, and glowdischarge tubes, and most of the. Also tells how to use each item best and most profit ably. Xray properties of elements electron binding energies xray energy emission energies fluorescence yields for k and l shells principal auger electron energies. A quick check in tube test conditions for hickok cardmatic tube testers, published by hickok in 1962, shows that they are tested with exactly the same electrode voltages and have the same fullscale gm. The basic research i have done between the 2 tubes using tube data sheets and they seem to indicate very similar characteristics. Double triode, 6h8c datasheet, 6h8c circuit, 6h8c data sheet.
Twin triode designed for use as a groundedgrid radiofrequency amplifier or as a. I used it as a retrace blanking amplifier in a homebrew oscilloscope because of its ability to handle pulses. Free vacuum tube data sheets free vacuum tube substitution guide manuals free radio tube data manuals free tube base diagrams. Please see the substitutes at the top of the page for more details. Applications of the rca7199 triodepentode in highfidelity. How to calculate tv7du tube tester settings from tube manual data. General electric sales helps booklet etr51, illustrating and describing the big, elaborate array of g e 1947 display, advertising, and promotion material available to radio service men and tube dealers. Another consideration is that they are relatively inexpensive on ebay, and you can risk trying a sample or two. Nov 17, 2011 the 7199 tube was intended specifically for hifi. He said that he didnt like the sound of the 7f7 because the gain was too low. 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. Get the best deals on 7f8 tube when you shop the largest online selection at.
If this checks out as ok, ill start to put together a shopping list for the rest of the project components. Vacuum tube 7f8, dual triode antique electronic supply. The 6p7s output beam power tetrode is designed for operation in line scanning output stages of tv receivers. Brimar has several brands around the world that may have alternate names for d8 due to regional differences or acquisition. Though some might not think that it is as special as some others that can do the same job, i am quite fond of it. Lawrence berkeley national laboratory introduction. Free vacuum tube data sheets free vacuum tube substitution. Tube 7f8 or rohre 7f8 id3558, double triode, loctal8, b8g sylvania, 1938 and vhf shown. It has many circuit diagrams, using these tubes and all the information, about these original vacuum tubes. This 1932 rca below manual provides all the data sheet information, of the first radio receiving tubes ever made, from about 1920 to 1932. General purpose tubes in miniature, octal or larger glass packages. The heater voltage listed in the earlier data sheets is 7v which seems not equivalent to the 6sl7. In later data sheets the heater voltages of loktal tubes was specified at 6. As of 3505, i have finished scanning the general section, receiving tubes part 1, receiving tubes part 2, miscellaneous, specialpurpose receivingtype tubes, thyratron, ignitron, and glowdischarge tubes, and most of the transmitting tubes, as well as all.
Also i have halved the value and doubled up the output tube grid resistors. We believe that they were the first such types to hit the market, the 2f7 dating back to the early 1930s. Colonial model 652 5tube broadcast shortwave superhet radio service data sheet march 1935 radiocraft. Ive seen old stock tube dealers on ebay claiming that the pcc1897es8 can be substituted for 6dj8s as a dropin replacement. You will need to select some tubes for lowest microphonics, just like any other tube that you use. The primary use is as a class a voltage amplifier with resistancecapacitance coupling. Its summertime which means its time to build little tube radios again. This tube is not a direct 6bg6 clone, it is an octal modification of g807 tube, which one was soviet clone of famous 807. For many years now i have been scanning and posting radio service data sheets like this one featuring the colonial model 652, 5 tube broadcast shortwave superheterodyne radio receiver for many years now. Sylvania type 7f7 is a double triode highmu amplifier tube, of lockin. Tube 7b7 or rohre 7b7 id2855, vacuum pentode, loctal8, b8g sylvania, 1938 and rfifstage shown. Since i am still fairly new to tube building i am surprised that so few components need to be changed when doubling up tubes. The later 6p7g is the same valve but fitted onto an octal base. Within each of the data sections of this handbook, data are presented by.