100 Watt Man Pack HF Transceiver RT-671/PRC-47

The RT-671/PRC-47 is a two-man team pack transceiver for CW or SSB voice communication in the 2.0-11.999 me frequency range. It features simplified digital tuning in 10,000 channel increments with the operating frequency indicated directly on an illuminated dial. Transmit power output level is 100 watts PEP. An optional external 199Q-1 cooling blower can be used for continuous duty operation. An external 700C-1 FSK adapter permits teletypewriter communication and also provides forced air cooling for the receiver-transmitter unit. The RT-671/PRC-47 can be operated from either a 24V military pack set battery, a 24V vehicle battery, or a 115V, single-phase, 400 Hz source. 

General Specifications

• Frequency Range: 2.0 - 11.999 MHz
• Frequency Stability: ±25 Hz
• Number of Channels: 10,000 (1 kHz spacing)
• Modes: Voice, MCW (Morse Code With Carrier), or FSK (Frequency-Shift Keying)

Impedances

• Receiver RF Input: 50 ohms
• Transmitter Output: Matches either a 15-foot whip antenna or a 50-ohm load
• Receiver Audio Output: 300 ohms

Power

• External Power Source: 24 VDC or 115 VAC, 400 Hz nominal (negative ground) - interchangeable with AN/PRC-38 or AN/PRC-41 radio set batteries
• Power Consumption: Transmit: Less than 320 watts. Receive: Less than 18 watts

Dimensions

• Transceiver: Width: 23.125 inches (58.74 cm), Height: 13.69 inches (34.77 cm), Depth: 6.94 inches (17.62 cm).
• Battery Case: Width: 4 inches (10.16 cm), Height: 9 inches (25.08 cm), Depth: 11.69 inches (29.37 cm)

Weight

• Transceiver: Approximately 41 lbs (18.6 kg)
• Battery and Case: 17 lbs (7.71 kg)

Transmitting Characteristics

• Power Output: Selectable 100 or 20 watts PEP (Peak Envelope Power)
• Audio Fidelity: ±6 dB from 300 to 3000 Hz, relative to 1700 Hz
• Distortion: Third-order intermodulation products at least 30 dB below two equal test tones at 100 watts PEP (using voice modulation)
• Carrier Suppression: 40 dB below desired output
• Spurious Output: At least 50 dB below desired output

Receiving Characteristics

• Sensitivity: 2 microvolts for 10 dB signal-to-noise ratio; minimum 50 mW audio output
• Selectivity: -6 dB at 300-3000 Hz above channel frequency (reference: 1700 Hz above channel frequency). 
• AVC (Automatic Volume Control): Less than 10 dB audio output variation for input signals from 5 to 100,000 microvolts
• Audio Output: 500 milliwatts with 1000 microvolt input
• Audio Distortion: Less than 15%

Here you find 100 models, 77 with images and 35 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Collins Radio Company; Cedar Rapids (IA)