2014年9月6日 · Push-Pull (PP) EL84 Tube Amplifier Schematic with ECC83 input stage. The tube rectified power supply uses an EZ81 tube. There is more information available about tube …

EL84是Peter Qvortrup個人最喜歡的五極管，早在Audio Innovations時，他就推出過EL84的推挽後級。 到了Audio Note年代，他就以Oto SE來表達對EL84的鍾愛。 Oto SE可以選擇僅有高電 …

2015年2月1日 · EL84 UL Push-Pull Stereo Power Amplifier with Hashimoto Transformers. This amplifier was originally featured on the October 2003 Issue of the "High-Fidelity Audio: Radio …

2024年10月25日 · What I've built is set out in the attached schematic, with measured voltages. It's been cobbled together P2P, isn't pretty, but low on hum and static. And works. It's basically …

2022年8月4日 · It doesn't take much to build a good EL84 amp with some proven tweaks. The amp I built in 2006 justifies that quite well. Of course, being a long-time experienced …

2021年8月24日 · It had been said that it is hard to make an EL84 PP amp sound bad. The circuits mentioned will all sound very good if built correctly, and vary more by quality of parts and …

2007年12月15日 · The tube amplifier project uses EL84 / 6BQ5 valves in a self-inverting push-pull topology with a 5751 SRPP driver stage. For full details see the PoddWatt class-A stereo …

EL84 cathode resistors are 150Ω for about 48mA anode current giving near class AB1 type operation. These can be increased for nearer to class B, especially if 'sag' is desired …

2021年9月26日 · This is the last circuit I have developped around a push-pull of EL84. The intention was to make a simply solution with a very good OT trafo. In attach the schematic: it …

2022年2月20日 · Figure a pair of EL84 draws 1.5A. The ECF80 almost 0.5A, double that if you rectify it for an amp gives you 2.5A total, so well within margin. I would build it with AC heaters …