ESC
Tru-Fidelity 2A3

Tru-Fidelity 2A3

BrandThordarson
ManufacturerThordarson Electric Mfg. Co.
FunctionAmplifier, Integrated
Produced1937
CountryUnited States
Model IDT-10W11
Form FactorDesktop / 19" Rackmount Convertible
Signal PathAnalog Hardware
Dimensions41.9 × 27.9 × 22.9 cm (W × H × D); 41.9 × 27.9 × 12.7 cm (W × H × D)
Output Power10W (+32.2dB to 0dB reference of 6mW)
Output Tube2A3
Gain77.1dB (From 100kΩ Input)
Gain (Crystal Microphone)110dB (At 100kΩ)
Gain (Crystal Pickup)71.1dB (At 100kΩ)
Gain (Line Input)69.8dB
Line Input Impedances500Ω, 333Ω, 250Ω, 200Ω, 125Ω, 50Ω
Output Impedances15Ω, 10Ω, 7.5Ω, 5Ω, 3.75Ω, 1.25Ω
Line Output Impedances500Ω, 333Ω, 250Ω, 200Ω, 125Ω, 50Ω
Hum Level-5.5dB (-37.5dB from Rated Output or 1.6mW)
Tube Complement6C6 (x4), 76 (x2), 2A3 (x2), 5Z3, 80
MSRP (1937)$160
Channels1 Channel