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2A3 Mother Of Audio Tubes Valves | eBay Stores
https://www.ebay.com/str/2a3motherofaudiotubesvalves
2A3 Mother Of Audio Tubes Valves | eBay Stores
https://www.ebay.com/str/2a3motherofaudiotubesvalves?_pgn=3
The 2A3 Tube Amplifier - A Tribute to Simplicity and Warm ...
https://audioxpress.com/article/the-2a3-tube-amplifier-a-tribute-to-simplicity-and-warm-sound
In this project, the 2A3 power tube runs at a 60-mA plate current with no signal applied and has a 410-V plate voltage. The output transformer’s primary impedance is 3.3 kΩ (see Figure 1). Because the 2A3 tube is a directly heated triode, the cathode and filaments are connected, so the design must avoid hum.
2A3, Tube 2A3; Röhre 2A3 ID2827, Triode, vacuum
https://www.radiomuseum.org/tubes/tube_2a3.html
UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bo) Was used by. Radio/TV-reception etc. Filament. Vf 2.5 Volts / If 2.5 Ampere / Direct / Specified voltage AC/DC. Description. The first 2A3 tubes were made by the major US manufacturers with a single element structure, similar in appearance to the type 47 structure.
2A3 @ The Valve Museum
http://www.r-type.org/exhib/aaj0171.htm
The 2A3 is an audio power triode that is still used in amplifier designs. Modern manufacture reproduces this directly heated design. The 2A3 is normally used in a push-pull arrangement and care needs to be taken in the bias settings for each valve as a small change in grid bias will greatly alter the standing anode current and any mismatch will impair the reproduction quality.
2A3 Mother Of Audio Tubes Valves | eBay Stores
https://www.ebay.com.au/str/2a3motherofaudiotubesvalves
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