THE FISHER SA-100 STEREO AMPLIFIER

Fisher sa 100 specs The Fisher SA-100 is a vintage stereo power amplifier released around 1959–1963 by Fisher Radio Corp. Technical Specifications • Power Output: 24–25 watts per channel into 8Ω (stereo) (approx. 50 watts total music power / IHFM standard) • Tube Complement (7-tube circuit): • Output Tubes: 4 x 7189 (ruggedized EL84 variant rated for higher plate/screen voltages) • Audio Amplifier / Phase Inverter: 2 x 7247 (1DW7) • Rectifier Tube: 1 x GZ34 / 5AR4 • Total Harmonic Distortion (THD): 0.8% • Input Sensitivity: 1.0 Volt • Signal-to-Noise Ratio: 90 dB • Speaker Load Impedance: 4Ω, 8Ω, and 16Ω taps (4Ω to 16Ω compatible) • Special Features: Center channel output for adding a third amplifier/speaker system, plus individual adjustments for bias, DC balance, and AC balance. • Power Requirements: AC 105–120V, 50–60 Hz, rated at 155 Watts (1.5 Amps at 117V). • Dimensions: 12-9/16" wide x 6-3/4" high x 7-1/8" deep (approx. 319 x 171 x 181 mm) • Weight: ~24.5 lbs (11 kg / up to 30 lbs depending on housing/cage) THIS HAS 3 MULLARD 7189 tubes and one sylvania, 2 fisher tubes, and the gz34 rectifier.