Sherwood S-7800

 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