Model S-7800
140 Watt AM-FM Stereo Receiver with Microcircuits and Field Effect Transistors
Featuring:
Monolithic
Microcircuits
140 watts
Music Power
FET RF and
Mixer Stages
Symmetrical
differential FM limiter
Low-distortion
FM detector
DC Coupled
All Silicon Power Amplifiers
Mono
(center-channel) Output Terminals
3-years
Warranty on all parts
Specifications
FM
Sensitivity (IHF): 1,8 µV for -30 dB
(noise and distortion below 100% mod.)
Typical
Sensitivity FM: 0,95 µV for 20 dB
quieting. 5.0 µV for 50 dB S/N
Typical
Selectivity
FM : 250 kHz at -6 dB; 820 kHz at -60 dB
AM : 4 kHz at -6 dB
FM Ratio
Detector: 800 kHz (peak/peak)
Capture
Ratio: 2,0 dB
FM Tuning
Range: 87,5 - 108,5 MHz
AM Tuning
Range: 530 - 1650 kHz
Distortion: less than 0,15%
Hum and
Noise Level
FM: 70 dB below 100% mod.
AM: 56 dB below 100% mod.
FM
Crossmodulation Rejection: -95 dB
AM Rejection
(on FM): -55 dB
FM
Stability: ±10 kHz (±.01%)
Record
Output: 1 volts at 100% FM
FM
Oscillator Radiation: 3 dB below FCC
stds.
Antennas
FM: 300 Ω balanced
AM: Directable ferrite rod w/external antenna
connection
Frequency
Response:
FM
Mono : 20 - 20,000 Hz (± ½ dB)
FM
Stereo : 20 -15,000 Hz (± ½ dB)
AM : -6 dB at 4,0 kHz
Amplifier
: 20 - 20,000 Hz (± ½ dB)
Inputs: 2 High Level; 2 (RIAA) Phono-preamp; 2 tape
monitor
Power
Output:
Music
Power : 140 watts at 4 Ω; 100
watts at 8 Ω
Continuous
Power (each channel) : 60 watts at 4 Ω; 40 watts
at 8 Ω at 0,6% distortion
Outputs: 4 to 16 Ω left and right speaker main and remote, stereo headphone and record
output
Inverse
Feedback: 50 dB
Damping
Factor: 40 : 1 at 8 Ω
Tone Control
Response: Flat Setting 20 Hz to 20 kHz
±1 dB
Tone Control
Range: 15 kHz, 15 dB, boost or cut, 40
Hz, 16 dB boost or cut
High
Filter: 20 kHz, 23 dB rejection; 5 kHz
less than 3 dB down
Preamp
Equalizer Curves: AES/RIAA phono and NAB
tape
Sensitivity:
Phono : 1,6 mV
Tape Head
: 1,2 mV
Aux : 0,2 V (PH and TP inputs are adjustable with
preamp level Control)
Max. Input
Capability:
Preamp
: 250 mV for less than 1% distortion
Aux : 2,5 V for less than 1% distortion
Max. Hum and
Noise:
Volume
control min. 90 dB (weighted) below rated output
Auxiliary
input (controls maximum) 80 dB (weighted) below rated output
Phono input
(controls flat) 60 dB below rated output
Interchannel
Crosstalk: less than -40 dB at 1 kHz
Power Supply:
115 - 125 V, 60 Hz, 30 to 160 watts fused
Dimensions (W x H x D):
16 ½" x 4 ½" x 14"
Weight
(shipping): 35 lbs
This was our family's first stereo, acquired in 1967. 140w, thd 1%, we got it along with AR-1 speakers. It worked very well but eventually the selector switch went bad (caps were okay) in the 1980's. I believe it was one of the first transistorized am/fm stereo receivers, that's why my dad got it, i believe the price was about $350 in 1967.
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