12hg7 tube data book

The 12bv7, 12by7, 12by7a, and equivalents were a class of mediumlow gain, pentode vacuum tube amplifiers using the noval socket configuration. Our preferred method of payment is via wire transfer of funds. So the circuit must be different from that of a1 class amp. Variation from tube to tube is pretty bad, and the mathced ones tend not to stay matched for long. Having satisfied my lust for an set amp with the 300b, this former gm70 set stereo amp project has now become a gm70 triode stereo oddwatt, the highest power, most outrageous version i can come up with of a self inverting push pull output. The series shares the eia 9bf pinout with a number of other miniature pentode. Usa tv7du tester tv7 ultimate updated tube test manual all. If the page is blank click here rca 6fq7 6cg7 datasheet. Complete tube data is in every single box, like big transmitting us wwii tubes. Selecting tube 1 as being least best i collected the data in the first row in each cell of the second set of data. 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. This means class a2 operation would be probably allowed. Using the pentodetriode tube as the amplifierphase splitter.

Having satisfied my lust for an set amp with the 300b, this former gm70 set stereo amp project has now become a gm70 triode stereo oddwatt, the highest power, most outrageous version i can come up with of a. The underscore and these letters are not part of the tube type number. After making measurements on other tube types i was amazed by the distortion figures for the optimized operating point. Tube type list the following list shows the tube types i have entered in my database, with exception of the service types e. Of course, a2 class operation requires low impedance driver stage to absorb grid leak current. I have more than 100 pieces, most of them were made in 60s and 70s, this batch is from 1962 complete tube data is in every single box, like big transmitting us wwii tubes. Also includes department of the air force technical bulletin to 33aa21531m supplement test tube data. Diy audio projects forum gm70 triode stereo oddwatt srpp sipp.

The india made bel 12ax7 is by far the best value in 12ax7 tubes. In my listening experience, these 12bz7 are very, very clear articulate, and tend to emphasize treble a bit. 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. For video output amplifier service in color tv receivers. You can give them a try, but if you dont like a 12at7 subbed in whatever position you try, you will probably not like the 12av7. Vacuum tube, vintage radio and other electronics information. Made on philips mullard equipment and identical to a mullard 12ax7, but pumped in india, these have the exceptional tone of a mullard and accentuated mids without the hefty price tag. Book depository books with free delivery worldwide. My tube manual indicates that these tubes are video amplifiers. May 10, 2020 this experiment has taken an unexpected turn from.

So when data is missing, take a tube data book, and do it yourself. Only one of the tubes in one of the circuits came close to this value. I am working on scanning and placing on this page the entire rca hb3 tube manual. This is done in case of equal tube type numbers for different tubes. 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. Click to see all 6sn7 6sn7gt 12sn7 12sn7gt in stock.

Vacuum tube 12gn7a 12hg7, pentode, sharp cutoff antique. 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. 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. Miniature, sharpcutoff pentode designed primarily for video amplifier service in television receivers. Taking the tube manual data for the 6l6 as an example the distortion for a pair in push pull at 25 watts is 2%. Does anyone know of a good substitute for this tube, or a good source of nos ones.

Diy audio projects forum gm70 triode stereo oddwatt srpp. Double triode, 6h8c datasheet, 6h8c circuit, 6h8c data sheet. With almost datasheets and the visitor counter indicates over 4000. In my listening experience, these 12bz7 are very, very clear articulate, and tend to. The following list shows the tube types i have entered in my database, with exception of the service types e. Looking for gm70 driver tube suggestions so i have started this new thread. So mk1 basically can still today do any tube whatsoever. I found a large amount of matched pairs tektronix, inc. Tube 12hg7 or rohre 12hg7 id5419, vacuum pentode, noval, b9a and shown.

Antique radio forums view topic 12sg7 substitution. Tube 12sg7 or rohre 12sg7 id2636, vacuum pentode, octal int. Although originally marketed as pentode tubes for use in early television receivers, they found additional uses in audio and radiotelephone equipment. The army manual is a word to word and page to page duplication. I managed to get two nos ones a while ago, but im concerned about long term support. The avo tube data book was updated for the mk1 way into modern times, so you have lots of data for modern tubes, and there are blank sockets positions, so you can mount a few of the modern sockets in there. This is a department of the army technical manual tb116625274121 c3 this manual covers test tube data for the tv7 series of tube testers. The function that is was designed for is as the luminance output stage for colour television. I dont know what the application of this tube will be i.