THE COLLINS 851S-1 RECEIVER
The Rockwell-Collins 851S-1 is the latest offering in our expanding line of user-oriented hf receiver products. The 851S-1 features "continuous" rate sensitive tuning and a phase-locked digital variable bfo. A single rotary knob tunes either the receiver frequency or the bfo offset. At low rotation speeds, the frequency change rate is linear to provide fine tuning down to 1 Hz. As knob rotation speed increases, the frequency change rate increases exponentially to allow rapid tuning. Coarse and fine tuning rates are front panel selectable to faciliate large frequency excursions.
851S-1
Receiver
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Courtesy of Sandy - KW6KW
Veratility and growth capability are offered through the many available options. These options permit user configuration of the 851S-1 to
satisfy individual system and mission requirements. Fast sythesizer channeling time and standard remote control schemes further enhance the receivers's capability. Slide-out chassis and plug-in circuit cards provide easy access
to maintenance. Two layer cards, color-coded test points, common extender boards, and HF-80 commonality ensure supportability of our newest receiver product -- the 851S-1. FEATURES
SPECIFCATIONS Frequency coverage . . . . . 250 kHz to 29.99999 MHz (down to 12 kHz Frequency stability . . . . . .Not more than 5 x 10-7 from 0 to +50 C. Drift Channeling speed . . . . . . 2 ms nom; 5 ms max. Sensitivity (SSB) . . . . . . . 0.25 to 1.6 MHz: 2 uV "hard"; Modes of operation . . . . . A3A/A9B (ISB optional); A3J Bandwidths . . . . . . . . . . 16 kHz; 2.7 kHz USB/LSB Antenna input impedance. .50 ohms nom, unbalanced Rf overload protection . . . . Up to 100-V rf input power on or off
Audio outputs . . . . . . . . . .Line: 600 ohms, 0 dB mW nom, balanced Squelch . . . . . . . . . . . . . .Operates on audio signal-to-noise ratio. Audio hum and noise . . . . -40 dB on line audio output. AGC threshold . . . . . . . . 3 uV max. AGC control . . . . . . . . . . 6 dB max rise in audio output for signal increase Primary power . . . . . . . . . 100/115/215/230 V ac +/- 10% single phase, Physical . . . . . . . . . . . . . Size: 483 mm (19 in) wide x 178 mm (7in) high x Mounting . . . . . . . . . . . . . EIA 483-mm (19-in) equipment rack, or optional case. Weight . . . . . . . . . . . . . . 17.2 kg (38 lb), nominal.
Environmental . . . . . . . . . Temperature: 0 to 50 C. Humidity: 0 to 95% relative humidity.
with vlf option).
rate not more than 3 x 10-18 per week.
1.6 to 29.9 MHz: 0.7 uV "hard"
(10 dB (s+n)/n).
(USB or LSB); A3/A3H (AM);
A1 (CW); and F3 (FM optional).
Headphone: 600 ohms, +10 dB mW max.
Speaker: 8 ohms nom, 2 watts peak.
Applicable to speaker output only.
from 3 uV to 0.3 V.
47 to 63 Hz; 100 W max.
483 mm (19 in) deep (531 mm deep with handles).
Altitude: 3,658 m (12,000 ft) operating; 12,190 m (40,000 ft)
nonoperating.
