There has been a seller at radio shows in the midwest, such as elgin and lansing, selling certain types of 6bg6gas with adapters to use them as a 6l6 replacement. The classic envelope is 37 mm in diameter and, excluding the io base pins, is 94 mm tall. The red rca 5693s were designed be a much, much more rugged tube with a life span of 10,000 hours. Since i am still fairly new to tube building i am surprised that so few components need to be changed when doubling up tubes. If the page is blank click here rca 6fq7 6cg7 datasheet. It is a myth that you need to use sylvania tubes in drake equipment. The 6j6 tube is a dualtriode tube rated for 300v on the plates. If you have you probably understand my interest in a lower cost substitute replacement. Double triode, 6h8c datasheet, 6h8c circuit, 6h8c data sheet.
The result is a highvoltage tube circuit that is more or less selfbalancing for the tube pairs. They are good quality and found in many chinese amps and preamps. All schematics ive seen with a similar lineup use a 6c6 in the second stage. A 6bg6 is a horizontal output sweep tube for early black and white tvs. British made by gec in hammersmith uk, this is the best sounding 6j5gt 6j5wgt triode tube type. Xray properties of elements electron binding energies xray energy emission energies fluorescence yields for k and l shells principal auger electron energies. Easily select individual manual pages and print out. Test results using the 6ju6 tube as a substitute for. The tube used as the example is the 6sj7, but any sharpcutoff pentode will do, such as the miniature 6au6. Antique radio forums view topic substitute 6d6 for 6c6. I can only see a spec of what i think was the third band. This chinese ef86 6267 tube type is commonly called a 6j8 tube in china. The tube lineup as i received it was 6d6, 6d6, 43, 25z5. The loop creates a localized charge field that when catalized by the chemical in the silver splotch, burns up excess gas molecules that may have leaked inside of the tube.
The shuguang chinese 6j8 is direct replacement of ef86 6267. A few specialquality tubes did not have a standard equivalent, e. If you have you probably understand my interest in a. It runs an ez81, a couple 12ax7s and a pair of pp 6gk6 power tubes. Type 6j7 is a contemporary of the magic three and almost as ubiquitous. No model numbers anywhere, no tube layout chart, only the nice orange plant a sticker and a universal tag on the wood case. It makes things very easy if you have four dmms for the various measurements. A pretty nice amp, full of the bluemolded signal caps like old fender blackface amps. I have owned many different pieces of drake equipment and have never had anything but stellar performance from all american made 6jb6srca, ge and sylvania.
It probably would not surprise anyone to learn that while there are thousands of different tube numbers, many of these are just the same electronic type with a different envelope or different basing. The mullardphilips type ef37a, for many years the standard british lownoise audio pentode, is really a 6j7g under another name. Tube 6j7 or rohre 6j7 id2098, vacuum pentode, octal int. The 6j9p 69 highfrequency shortcharacteristic pentode has been designed for use in wideband amplifiers of electronic devices.
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. Wcox056107b watercooled packaged chillers with helical. The diodes would be for signal and agc rectification and the triode would act as agc amplifier or first audio amplifier. Ive seen the ads saying the 6ju6 tube is a substitute for the 6bj6 tube used in the drake transmitter equipment. Grounding the internal shield on a tube the radioboard. 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.
Im gonna try to determine what value this mystery resistor should be based on the tube data but any guesses are welcome. Free vacuum tube data sheets free vacuum tube substitution guide manuals free radio tube data manuals free tube base diagrams. Free vacuum tube data sheets free vacuum tube substitution. Looking at the rca data sheet 1948, the 6j7g has an internal shield on pin 1,but the gt version is pin 1 is conected to the metal band on the base, but no internal shield. It was for two decades the international standard valve for audio amplifier input stages and audio systems generally. Does anyone know where i can get the tube data for the heathkit tt1 tube tester. The 9 is a highvacuum cathoderay tube utilizing the allmetal construction and having a fluorescent viewing screen approxi mately one inch in diameter. Have you priced a matched pair of 6jb6s for your drake. If you need more than the quantity available, please email us at. The list below gives 4, 5, 6, and 7 pin types and their octal equivalents. With almost datasheets and the visitor counter indicates over 4000.
Typical radio receiver and amplifier circuits 1 2 3 4 5 6 7 8 9 10 11 12 14 15 16. Antique radio forums view topic question on 6sg7 tube. The classic envelope is 36 mm in diameter and, excluding the io base pins, is 99 mm tall. Franks electron tube pages american substitutes for foreign types this data is scanned and may contain errors caused by the ocr software.
But then were are talking very old technology that has sat around for quite a while, so i can be a bit of a crap shoot either way. I am working on scanning and placing on this page the entire rca hb3 tube manual. This is a list of vacuum tubes or thermionic valves, and lowpressure gasfilled tubes. The brimar types 6j7g, 6j7gt are indirectly heated pentode amplifier valves. Galls bottled 6sj7s always seem much noisier than the metals, at least in my experiences. Check the band to chassis to make sure the floating minus is not on the band,to prevent any accidental shorts to chassis. If this checks out as ok, ill start to put together a shopping list for the rest of the project components. Quality russian 6j51p tube was made in ussr for the military equipment. Etc, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors. A word about the use of sylvania tubes in drake equipment.
The 6q7g is a double diode triode and was designed for receiver audio use. A flat sheet beam is electrostatically deflected across the anode which is. This is a suitable replacement for any 6j5 6j5g 6j5gt 6j5wgt triode tube type. The second diode is used as a limiter to dampen strong peaks, which might cause the thyratron tube to con. Also i have halved the value and doubled up the output tube grid resistors. Although originally designed as a detector its linear characteristic and good internal shielding cf. Lawrence berkeley national laboratory introduction. Im converting an old thomas organ amp into an 18 watter.
A 6zy5g diode is used as avc tube to maintain an even input, to the 2a4g thyratron rectifier output stage, throughout a wide range of signal strength. Watercooled packaged chillers with helical rotary compressors installation, operation, and maintenance instructions form 6186 wcox056107b table of contents. Grounding the internal shield on a tube the radioboard forums. Ive been looking at the resistor under magnification and the first two bands are definitely brn blk. Tube 6j7g or rohre 6j7g id2694, vacuum pentode, octal int. The 6j5 is a generalpurpose triode designed for use as a detector, amplifier or ose. The svetlana 6as7 is a glass envelope, dual power triode with high transconductance and high plate current capacity. I used 105 v from a vr tube at first, later the allinone supply described above, which proved very convenient. This data is scanned and may contain errors caused by the ocr software. I see that these are similar to 6bq5s, but have a different pinout and can take a little more plate voltage.