Jan 19, 2019 · As for listening test, I played several type of music, this 2A3 SE amp is much differ from my previous 6SN7-2A3 or 717A-2A3, the plate choke can really store energy and I get …

Aug 11, 2022 · I've started developing a 2A3 SET amp by trying different published circuits, and will use this thread to record information for those who come after and foster discussion for …

Mar 15, 2023 · The effective anode voltage of the 2A3 is only 220V and anode load 3.3K instead of 2.5K. Although the Sovtek is not really like the original 2A3, I am not sure it can do 3.5W. …

Dec 11, 2012 · List of 2A3 SE Circuit Designs? Anybody seen a list of 2A3 single ended designs out there? Looking for comparisons and pros and cons - in particular, curious about the newer, …

A detailed schematic and description of the two preassembled PMJ8900 boards that control the 2A3/300B auto-detect, the soft-start, and overcurrent protection would be great. A balance …

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Almost 2A3 SE amplifier that I have made before has much distortion after 3W, this one get 6W of power at only 5% of distortion. The sound as testing in our system is really good. The biggest …

This 2A3 SE valve amplifier is a class A power amplifier which has high linearity and low distortion, are capable to delivery 5W to 8Ω speaker for each channel. The first stage is SRPP …

Oct 27, 2012 · About the 2A3 tubes - I've had Sylvania, Sovtek, Shuguang 2A3C and JJ 2A3-40. Very amp and system dependent, but that's about the order I would list them in (Sylvania not …

Directly-heated triode tubes like the 300B and 2A3 enjoy an enduring popularity among audiophiles. The 300B with its rich midrange and extended bass - and 2A3 with its delicate …