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Fisher 80-AZ

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Technic details

Specifications

Type:
Monophonic Tube Power Amplifier
Power output:
30W into 8Ω (Mono, from 15Hz to 30kHz)
Frequency response:
20Hz to 20kHz (Within 0.1dB)
10Hz to 100kHz (Within 1dB)
Total harmonic distortion:
Less than 0.5% at 30W
Less than 0.15% at 25W
Less than 0.05% at 10W

Intermodulation distortion:
Less than 0.5% at 25W
Less than 0.2% at 10W
Damping factor:
26
Signal to noise ratio:
Better than 95dB (Bellow full output)
Internal impedance:
With Z-Matic Control counterclockwise, 0.61Ω for 16Ω operation
Phase shift:
Less than 15˚ at 20Hz
Less than 18˚ at 20kHz
[Controls]
Total of three:
PowerScope
Z-Matic
Input Level
Speaker load impedance:
4Ω to 16Ω
Valves / Tubes:
12AT7 x 1
12AU7 x 1
EL37 x 2
5V4G x 1
1NE51 x 1

Dimensions (W x H x D):
394 x 175 x 108mm
Weight:
Approx. 10kg (Shipping)
Year:
Around 1956

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