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6l6/12ax7 schematics please | diyAudio
https://www.diyaudio.com/community/threads/6l6-12ax7-schematics-please.194421/
6l6/12ax7 schematics please | diyAudio WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES. Building, troubleshooting and testing of these amplifiers should only be performed by someone who is thoroughly familiar with the safety precautions around high voltages. Amplifiers Tubes / Valves 6l6/12ax7 schematics please preludefan
4S Universal Preamplifier for 12A*7 Tubes - DIY AUDIO …
https://diyaudioprojects.com/Tubes/Universal-Tube-Preamplifier/
Matt describes the design and construction of the 4S Universal Tube Preamplifier. The 4S Universal preamp is a super simple single stage line level Hi-Fi preamplifier that will work with any of the 9-pin miniature 12A*7 twin triode tubes (12AU7 12AV7 12AY7 12AT7/12AZ7 12AX7). You can change tubes to vary the preamplifier gain.
DIY and Hi-Fi Audio Schematics - DIY AUDIO PROJECTS
https://diyaudioprojects.com/Schematics/
SE KT88 Tube Amplifier Schematic (12AX7 SRPP input) by Jean Hiraga - [6 Watts, SE, class-A] SE 6550 / KT88 Tube Stereo Amplifier Schematic (6N1P input) - [4 Watts, SE, class-A, Triode or UL] - (Project) SIPP 6550, KT88, KT90 Tube Mono Block Amp Schematic (5751 SRPP input) - [25 Watts, SIPP, class-A, UL] - (Kit)
Antique Radio Forums • View topic - 12AT7 vs. 12AZ7
https://www.antiqueradios.com/forums/viewtopic.php?t=307110
If they rebranded a 12AU7 or 12AX7 as a 12AT7, it would probably "work" in an audio circuit but not in an RF circuit. This could be especially a problem today as the 12AT7 is still being used in new guitar and audio amplifiers but there aren't any new tube FM radios being made.
Antique Radio Forums • View topic - 12AZ7 Tube Inquiry
https://antiqueradios.com/forums/viewtopic.php?t=362461
12AX7 was made for audio, high gain, low current, low noise. 12AY7 was like the 12AX7 but lower gain, even lower noise, 12AZ7 is like 12AT7 but has a higher heater-cathode voltage rating, so could be used in transformerless TVs, test instruments with high voltage.
pdf FACTORY - McIntosh Compendium
http://www.mcintoshcompendium.com/Compendium%20Docs/Power%20Amplifiers/PDFs/MC275%20Differences.pdf
MC 275 STEREO POWER AMPLIFIER VERSIONS The Compendium MC275G: (1998 ~ 1999) Titanium gold stainless steel chassis. Same design as CE. (450 V power supply). Tubes: 4-KT88/6550 output, 3-12AX7A, 4-12AZ7.S/N: MC275G-01~MC275G-71
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