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MARINE RECEIVER
Picture : JM CHERRY
1971 - 1977
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DESCRIPTION
The R. L. Drake Model RR-1 Marine Receiver is a commercial grade communications
receiver which employs the most up-to-date solid state devices and circuitry and offers
complete marine band coverage from 150 kHz to 30 MHz. The received frequency is indicated
by a two-speed dia1 that has accurate calibrations every 1 kHz. Modular construction on
easily accessible printed circuit boards is used throughout the RR- 1. The use of dual
gate MOS-FET transistors in the RR-1 circuitry contributes to its superior
intermodulation, AGC, wide ,dynamic range and overload performance. The front panel
controls allow the operator to Select frequency, AM, CW, LSB and USB reception. Other
controls include AF and RF gain, accessory crystals, range (band switch), preselector
tuning, AC or DC power, AGC on and off, and an antenna input attenuator.
The RR-1 has been designed to accommodate special customer requirements. Accessories
are available and space has been reserved internally SO that performance and operating
modes can be provided to fill special customer needs.
The R. L. Drake RR-1 receiver is among the lowest cost commercial grade marine receivers
available today upholding the R. L. Drake Company’s philosophy , "More
Performance and Lower Cost Through Engineering."
SPECIFICATIONS
 | Frequency Range:150-535 kHz, 1.5-4 MHz, 4-4.5 MHz,
6-6.5 MHz, 8-9 MHz, 12-13.5 MHz, 16-17.5 MHz, 22-23 MHz, 25-26 MHz. (4 additional 500 kHz
ranges from 0.5 MHz to 30 MHz are available with the addition of the appropriate accessory
crystals.) |
| Modes of Operation:
USB, LSB, AM, (RTTY with RY-4 accessory installed). |
| Frequency Accuracy: Within +- 1 kHz when receiver is
calibrated to the nearest 100 kHz point against the internal 100 kHz calibrator. |
| Frequency Stability: Less than 100 Hz for any 8 hour
period after warm-up at 25°C ambient temperature with less than +- 10% variation in supply
voltage. |
| Sensitivity : |
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Mode:
30% modulation 1 kHz |
350-535 kHz |
10 microvolts for 10 dB SINAD |
| 1.5-4 MHz |
25 microvolts for 20 dB SINAD |
| 4-26 MHz |
5 microvolts for 20 dB, SINAD |
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Mode CW and
SSB |
350-535 kHz |
2.5 microvolts for 10 dB SINAD |
| 1.5-4 MHz |
5 microvolts for 20 dB SINAD |
| 4-26 MHz 1 |
microvolt for 20 dB SINAD |
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| Image Rejection:
Greater than -60 dB below 15 MHz
Greater than -50 dB above 15 MHz |
| Blocking: An unwanted, unmodulated signal 120 dB above 1 microvolt 20
kHz above or below a wanted signal will not reduce the desired signal more than 3 dB as
measured at the receiver output. The desired signal has a level of 60 dB above 1 microvolt
and is modulated 30% at 1 kHz. |
*Measurements taken with signal generator with source impedance of 10 Ohms in series
with 250 pF below 4 MHz. Source impedance 50 Ohms above 4 MHz.
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| Crossmodulation: an unwanted signal 90 dB above 1 microvolt, modulated
30% at 1 kHz at a frequency removed more than 20 kHz above or below a desired Al (CW)
signal at a level of 60 dB above 1 microvolt Will not produce interference greater than 30
dB below standard output for the desired signal. |
| Intermodulation: Between 405 and 535 KHz two interfering signals must
have a level of 80 dB above 1 microvolt or more to give products equal to standard output.
The reference signal for this measurement is 20 dB above 1 microvolt. Between 1.5 and 26
MHz, the interfering signals must be 70 dB or more with the reference signal 30 dB above 1
microvolt. |
| Selectivity : |
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IF Bandwidth |
Mode |
-6 dB |
-60 dB |
CW Narrow |
0.4 kHz |
2.7 kHz |
CW Broad/LSB |
2.4 kHz |
7.2 kHz |
USB |
2.4 kHz |
7.2 kHz |
AM |
4.8 kHz |
10 kHz |
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