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The RR-3 is a solid state, broadband receiver which embodies
several unique state-of-the-art design features. The unique design offers excellent
sensitivity, selectivity, very high dynamic range and digital frequency readout combined
with general coverage capability. A high level double balanced mixer is used as the first
receiver mixer in an up-conversion mode. The use of this device assures the reduction of
both front-end overload and intermodulation to a minimum.
Continuous coverage is provided by a frequency synthesizer which generates an injection
signal every 500 kHz and a PT0 which tunes a 500 kHz range. Generous PT0 dial over travel
allows an
Other features include a notch filter for eliminating interfering heterodynes, switchable ACC with three selectable time constants plus "OFF", speaker on/off switch, a 600 ohm balanced output line amplifier, crystal-control operation at 500 and 2182 kHz (pushbutton selected), and capability of operation from AC or DC power.
Accessory items include a noise blanker, rack cabinet enclosure, internal DC-to-DC isolation power supply, and six additional programmable crystal controlled channels.
SPECIFICATIONS
 | Frequency Range: 10 kHz to 30 MHZ | ||||||
| Modes of Operation: USB, LSB, CW, RTTY, AM | ||||||
| Frequency Read Out: Digital readout to 100 Hz plus analog dial read out with accuracy better than 21 kHz when calibrated to nearest calibrator marker. | ||||||
| Frequency Selection: Band switched in 11 bands. Incrementally stepped up and down in 500 kHz increments within each band. Continuous tune over each of the 500 kHz ranges. | ||||||
| Frequency Stability:
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| Sensitivity: input Required for 10 dB (S+ N)/N at Freq. of: |
PREAMP |
0.01 to 1.5 MHz | 1.8 to 30 MHz | |
| SSB, 2.3 kHz BW) | ON OFF |
NA <1.0 uV |
<0.2 uV <0.5 uV |
| (AM, 10 kHz BW) | ON OFF |
NA <6.0 uV |
<2.0 uV <3.0 uV |
| (AM, 4 kHz BW,* 30% Mod.) | ON OFF |
NA <4.0 uV |
<1.2 uV <2.0 uV |
| Selectivity: |
| IF Bandwidth (kHz) | ||
Position |
- 6 dB | - 60 dB |
NORMAL |
2.3 |
4.2 |
WIDE |
10.0 |
60.0 |
| A | Positions A, B and NARROW are standard, same as WIDE. These positions are available for optional accessory filters | |
| B | ||
| NARROW | ||
| Ultimate Selectivity: Greater than 100 dB | ||||||||
| IF and Image Rejection: Greater than 80 dB | ||||||||
| RF Blocking: Greater than 100 dB relative to 1 uV (desired signal at 60 dB above 1 uV with blocking signal removed 20 kHz and its amplitude adjusted to reduce desired signal 3 dB). | ||||||||
| Cross Modulation: 90 dB relative to 1 uV (desired signal at 60 dB above 1 uV with undesired signal removed 20 kHz and its amplitude adjusted for cross modulation products 30 dB lower than desired signal). | ||||||||
| Intermodulation: 80 dB relative to 1 uV (To produce an output equivalent to that resulting from a 30 uV wanted signal, each of two equal level input test signals, each separated by at least 30 kHz from the wanted signal, must be a least 10 milivolts.) | ||||||||
| Automatic Volume Control: Audio output rises less than 6 dB for RF input change from 3 uV to 300 u V (100 dB). Attack time: 1 millisecond. Three selectable release times: 2 seconds, 400 milliseconds, and 75 milliseconds. Also AVC OFF. | ||||||||
| Antenna Input Impedance: Nominal 50 ohms (200 ohms on .01-.5 MHz range). | ||||||||
| Audio Output: 2.5 watts with less than 10% THD. | ||||||||
| Hum and Noise: Greater than 60 dB below rated output. | ||||||||
| Power Requirements: 100/120/200/240 VAC +-10% 50/60 Hz, 60 watts or 24 volts DC +-15%, 65 watts. (11.5 to 28 VDC using DC to DC isolation power supply.) | ||||||||
| Size and Weight: 5.25"H x 19"W x 14"D (13.3 x 48 x 35.6 cm); 19 Ibs. (8.6 kg) | ||||||||
| Accessories:
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