Electronics Tubes circuit

This Japanese single-ended, vacuum tube amplifier can be purchased in ‘kit’ form or fully assembled. Power output is 3.5 watts/channel. Supplied with Russian Sovtek tubes – 2A3 …

The 'Loftin-White' circuit, a 2A3 Single ended, direct coupled amplifier, no capacitor or coupling transformer between driver and power stages. Ultra minimalistic. This circuit is one of the most praised/hyped of the Single-ended breeds : 'Applying this method the final result is amazing. The amplifier reveals an amazing sound stage with warm sound and enjoyable harmonics.'

I would go with the first schematic, it's a bit simpler. You could build a stereo amp. The power transformer should be capable of at least 250mA...

Sarser & Sprinkle With improved Bias control

"There is nothing quite like a quality tube amplifier," states the author in the introduction to this directly heated triode amplifier project. The idea for the amplifier started from the author's discovery of the Loftin-White circuit. The author chose the 2A3 directly heated triode power tube to implement the Loftin-White circuit. The 2A3 vacuum tube is a power triode capable of outputting 3.5 W in a single-ended Class A configuration. This article was originally published in audioXpress...

Принципиальная схема лампового усилителя мощности с параллельным включением выходных ламп RCA-801A.

Несмотря на кажущуюся простоту схемы, этот ламповый усилитель имеет хорошее звучание, выходная мощность 2,8 Вт.

Schematic of the Loftin-White 2A3 Single-Ended Tube Amplifier. The circuit is directly coupled to the 6SL7 SRPP input stage.

Усилитель SE на 6П13С или 6П31С Варианты от Гэгэна | УМЗЧ.РФ

Schematic of the Loftin-White 2A3 Single-Ended Tube Amplifier. The circuit is directly coupled to the 6SL7 SRPP input stage.

After more than a decade since the original RH84 was designed, I feel that this 1st generation RH design could benefit from a revision updating it to my current design views and correcting some decisions made in a previous time with solutions that are, perhaps, more matured. The schematics of this revision 2 does not stray too far from the original design, as all the most important design choices and component values are still there. What are the revised issues? 1. g2 power supply The...

Несмотря на кажущуюся простоту схемы, этот ламповый усилитель имеет хорошее звучание, выходная мощность 2,8 Вт.