Russian tube data are correct,interpretation of data is usually incorrect,or misunderstood. The rca factory opened in bloomington in 1940 and became a major employer of men and especially women in the area. Heathkit zenith for sale gamers computers for sale. Parts free delivery possible on eligible purchases. Many modern megohmmeters use a high voltage 100 volts, or more to test resistances. A different amplifier, with different biasing and different power supplies, might perform quite differently. This sylvania 6gh8a tube has gray plates and a halo getter. This page includes supporting information for the 25 w stereo amplifier project described chapters 10 and 12 in the tab guide to vacuum tube audio, along with commentary from the author. They are great for restoring a vintage shortwave set or cranking out some classic heavy metal tracks.
Bold designators are close or identical, italic designators are different ratings, different pinouts or different filament voltages. Vacuum tube 6gh8a, triode, pentode amplified parts. Herein you will find a collection of vintage engineering texts, vacuum tube datasheets, and other obsolete information, presented free of charge and without annoying advertisements. The following list shows the tube types i have entered in my database, with exception of the service types e. The 6gh8a is a miniature tube which contains a sharpcutoff pentode and a mediummu triode. You reach this tube or valve page from a search after clicking the tubes tab or by clicking a tube on a radio model page.
You will find test data for many unique and rare tubes in a mighty mite setup book that you may not find elsewhere. The maximum reservoir capacitor is specified at 4 f and the rectifier needs a series resistance of 250. Some datasheets are only one page 3050k, some are 810 pages 300k and more. You can substitute the following tubes in place of a 7199 tube with a 6bl8, 6ea8, 6u8, or 6kd8 provided that you make the following wiring changes to your socket. I have rewired many circuits for 7199s to accept 12ax7 tubes. Another spot to look, which is especially useful if youre looking for replacement types and tubes with similar bases or characteristics, is the nj7p tube database. Triodepentode tubes such as the 6bm8ecl82, the 6u8a, and the 6gh8a present a challenge.
Currently the tube analyzer can save its plot images in portable network graphics png format or in scalable vector graphics svg format. We looked at the amplifiers internal error correction signals in addition to the output distortion, and the best news of all is that the 6gh8a makes the super seventy work much better than ever. E810, 6as6 sm 4109 5636 tube ma 4108 sm 4108 5636 400c subminiature tubes tube 5636. Shown on the right is the secondgeneration 20 w stereo amplifier described below. Data from or other sources as supplied by john atwood. If you have a tube manual cross reference the pin connections between the 2 tube types. At the bottom of this page youll find some links to other tube datasheet sites in case you cant find what youre looking for here. Russian book usually very clearly says what is data presented in the book.
For these reasons, every technician and tube collector should have a mighty mite. We do not know these differences as the 3bs2b tube data is not available. Tripletriode compactron tubes are challenging, as well. Most of the datasheets are in pdf format and some are links to other html pages. Svetlana 6bm8 high performance audio dual package, triode and pentode he svetlana 6bm8 is a single glass envelope containing both a power pentode and triode.
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. Vacuum tube 6gh8a, triode, pentode antique electronic supply. At the bottom of this page youll find some links to other tube datasheet sites in. Zenith heathkit digital techniques book 1 and book 2 for sale online. The bad news is that the 7l99 vacuum tube is discontinued and is no longer available except as residual old stock at a very high price. This tube was the heart of the dyna st70 amplifier and our super seventy upgrade thereto. Triode pentode, 6gh8 datasheet, 6gh8 circuit, 6gh8 data sheet. The simplest method is to save the plot image itself. Miniature tube which contains a sharpcutoff pentode and a mediummu triode. Tube datasheets here youll find a modest collection of datasheets for some popular tubes. For sale is reprint of hickok 752 752a tube test data book.
The open loop linearity is significantly improved, the correction signals have a much more desirable. The thin glass tube envelope is 20 mm in diameter, and excluding the b9a base pins is 50 mm tall. This is a list of vacuum tubes or thermionic valves, and lowpressure gasfilled tubes. General test data section is 22 pages long, obsolete tube types is 21 pages long, foreign tube types mostly european tubes section is 25 pages. Gec, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors. Please see the substitutes at the top of the page for more details. Nos tube specification sheet nos tube specification sheet. Vacuum tube audio audio projects 25 w stereo amplifier. Testing such tubes all at once would require three highvoltage supplies to power the two plates and the pentode screen grid. Software description and features provided along with supporting documentation and resources. Simply plug these adapters into a socket that is pinedout for a 7199 tube and insert a 6gh8a. With almost datasheets and the visitor counter indicates over 4000. The peaktopeak value of the swing gives us the maximum power that one side of a pushpull pair can deliver. The valve is specified for multivibratortype line deflection oscillators andor agc amplifier and syncseparator functions.
Ge usa 6gh8a tube nos nib mac 1500 heathkit cobra receiver for zenith 6ea8 for sale online. What you are now doing is supplying 6 volts between both pin 4 and 5 and pin. The 5r4gy is a high voltage power rectifier and was designed for transmitter use. The 6gh8a is a triode pentode with separate cathodes designed for television receiver use. Vacuum tube 6gh8a, triode, pentode miniature tube which contains a sharp cutoff pentode and a. It has a pentode plate dissipation rating of 7 watts with convection cooling. Audto bastcs iuly, 1990 page 3 new 6gh8a driver tubes for. The circuit is setup to be very sensitive and uses a very low voltage 8v to test a very high resistance. The yellow print on the glass has the sylvania logo. Vacuum tube 6gh8a, triode, pentode miniature tube which contains a sharpcutoff pentode and a. You can use the search to find service types or go to the service type lists that you can access from the page more tube related stuff. We drive the tube grid with a sine wave source to cause maximum plate voltage swing.
The user can save data from the tube analyzer in several formats. The first color televison rolled off the line in 1954, and bloomington became known as a world leader of television manufacturing. Audto bastcs iuly, 1990 page 3 new 6gh8a driver tubes. Vintage zenith z19 data systems serial terminal heathkit h19 vintage computer for sale online. Vintage tubes and tube sockets anyone working with classic electric guitar equipment or vintage radio receivers can use a few extra vacuum tubes.
Another spot to look, which is especially useful if youre looking for replacement types and tubes with similar bases or. You even can look up radio models with a certain tube line up. The sylvania 6gh8a tubes in this precisely matched pair have gray plates and halo getters. I try to concentrate on popular andor readily available tube types. Buy adapter adapts 6gh8a to use instead of 7199 tube. Direct substitute for 6gh8 ecf82 6ea8 6ea8a 6u8 6u8a. You will find thousands of tubes or valves with interesting links. This is a subminiature tube, probably made by raytheon, but i also find data from sylvania, ge and tungsol.
The triode is mounted at right angles to the grid axis of the pentode. Up for sale, single tube triode pentode 6gh8a premium quality, low noise and low microphony. Antique radio forums view topic 7199 tube replacement. New 6gh8a driver tubes for the super seventy amplifier we have bad news and good news this month. The power test operates the tube in a relay socket with a load resistor to represent the output transformer primary. The only hitch is that the 7199 is a 6 volt filament so what you do is connect pin 4 and 5 of the 12ax7 together and supply filament voltage between this point and pin 9. Tube 6gh8a or rohre 6gh8a id4874, triodepentode, noval, b9a and shown. In a few cases, when the 1966 edition omitted graphics on obsolete tubes, i inserted scans from the 1948 ginkins reference book. Western specialist,with out too much real knowledge,trying to convert russian terms and data under western terminology and it cause the big problems. This list is biased by the tubes that i have encountered during the repair of the many tube amps that have come to my repair shop. Each section has a separate cathode and is electrically. This adapter allows you to convert 6gh8a tubes to use instead of the hard to find 7199, 6gh8a not included. In addition to the data i have scanned and posted, if youre looking for data on a particular tube you should visit tsdl on duncanamps website, or franks tube data. Since upgrading my stereo 70 to van alstine ultimate 70, which by the way also converts the driver tubes over to 6gh8a on its board, i took the adapters and moved them into my dynaco sca35 integrated tube amp for the 7199s.
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