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2E22 - "300B Pentode"
https://groups.google.com/g/rec.audio.tubes/c/KbSNByqXUUM/m/H9RM_RGWxxkJ
the 2E22 plate! The electrode assembly in the 2E22, are however a higher. quality,simply because it is a modern tube. (The 300B, being developed in 1928-33) 2E22 has smaller bottle than, the 300B. Also the plate are not as tall, as the 300B. But as the 2E22 is a 30Watt tube, it all makes sence. The NEOTRON,made in France, is certainly a pentode.
Tube 2E22 in triode mode | diyAudio
https://www.diyaudio.com/community/threads/tube-2e22-in-triode-mode.224800/
Vg2 max on data is 250V. It's real barrier for high voltage in triode mode, so we cannot get high power out. But it's in penthode and in class C. It can be different in case of triode mode. I have seen a schema in which Vak is 420V for 2E22 in triode. But that circuit works stable for more 1 year. wow. If I can get its data on triode mode, then ...
PCB circuit Finished board For FD422 2E22 Single-ended ...
https://mypcbcircuitboard.com/2020/04/27/pcb-circuit-finished-board-for-fd422-2e22-single-ended-tube-amplifier-no-tubes/
The item “PCB circuit Finished board For FD422 2E22 Single-ended tube amplifier (No Tubes)” is in sale since Tuesday, January 1, 2019. This item is in the category “Consumer Electronics\TV, Video & Home Audio\TV, Video & Audio Parts\Amplifier Parts & Components”. The seller is “2012htj*2012htj” and is located in Shenzhen.
Amazon.com: Shuguang Brand FD422 Vacuum Tube …
https://www.amazon.com/Shuguang-Instead-Amplifier-Headphone-Acoustic/dp/B07ZWGX92V
Shuguang Brand FD422 Vacuum Tube VaIve Instead of 2E22 Made in 70s for HiFi Hi-end Amplifier Audio Senior Player Headphone Pro-amp Fever Acoustic DIY Lab 1PC Brand: SHUGUANG Black Case, Produced in China, in the 60s, 70s,Made by an old National Brand:Shuguang
Mono & Stereo © 2021: Aikido SE tube amplifier
https://www.monoandstereo.com/2014/09/aikido-se-tube-amplifier.html
Another great build. 2E22 Aikido SE tube amplifier by gotgi³. Aikido 6sl7 + 6sn7
PCB circuit Finished board For FD422 2E22 Single-ended ...
https://www.ebay.com/itm/PCB-circuit-Finished-board-For-FD422-2E22-Single-ended-tube-amplifier-No-Tubes-/312410999085
Parameters: Board Size: 337.82 x 134.62mm Features: * For FD422 tube, the board design of the filament AC power supply (recommended to the board configuration high-voltage delay circuit board) * The circuit board has a standard connection, super-linear connection and triode connection jumper position.
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