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Drake R8

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Desktop HF/VHF Receiver

The Drake R8 is a microprocessor controlled, synthesized, all mode, world band receiver offering excellent sensitivity, high dynamic range and other features for the most demanding listener. It has been designed as a "complete package." You get many items as standard-equipment, that would be extra on other receivers. Multi-mode reception (AM, FM, USB, LSB, RTTY and CW) is featured throughout the range of the receiver (100 kHz to 30 MHz). A high-Q, 8-pole, electronically switched IF filter provides a range of five bandwidths. Later "firmware" permits user selection of bandwidths independent of mode and 100 Hz readout in AM (in later production only). The front panel liquid crystal display provides visual feedback to the operator of the current status of the receiver. In the AM mode, a selectable synchronous detector (SYNCHRO) allows for enhanced reception by eliminating or reducing distortion due to fading signals. A Passband Offset control also aids in reducing or eliminating interfering signals by electronically shifting the receiver's IF frequencies without disturbing the operating frequency. This action allows the operator to electronically move interfering signals out of the receiver's passband thus utilizing the degree of selectivity provided by the high-Q, 8-pole IF filter. The Passband Offset is also coupled to the synchronous detector (SYNCHRO) allowing the passband to be altered while the detector is in use. Other reception aids include selectable AGC, wide/narrow noise blanker, RF preamplifier for enhancing weak signals, RF attenuator for further improvement of strong signal handling capabilities and an adjustable RF gain. A Notch filter is also supplied as an effective tool to eliminate offending tones (heterodynes). A muting control allows operation with a transmitter or transceiver. The R8 provides exceptional audio to the built-in speaker.

Two VFOs (tuners) called A and B, are provided on the R8. Selection is made with the VFO function key. Frequencies can be directly entered through the keypad. A programmable memory area allows for 100 non-volatile memories segmented into blocks of ten. The following may be stored in any memory location: frequency, mode, bandwidth, AGC setting, RF setting, antenna, notch on/off, noise blanker setting and synchronous detector on/off. As a result of three scan methods and three scan modes; nine distinct scan functions are supported in the R8. The three methods are: Stop at carrier detect, Pause 5 seconds on carrier and Pause at carrier until carrier drops for 5 seconds, then resume scan. The three modes are: Scan all memories, all unlocked memories of user-selected list or Scan from VFO A to B.

A built-in 24 hour clock-timer allows the R8 to turn on and off at preset times. In addition, the rear panel Timer connection (5 pin DIN), allows control of small recorders, etc. to record a favorite program. The R8 rear panel provides a common DB-9 connector for standard RS-232C data communications with a terminal or personal computer (9600,1,7,1,even). This interface provides control and programming capability of the R8. Only the analog controls such as volume, RF gain, etc. are not controllable. There is also antenna inputs for coaxial lead in for wire type antennas. A variety of AC input voltages may be selected as well as 12 VDC input. The R8 is a worthy successor to the earlier Drake R7A.

Specifications
Type
Desktop Amateur HF/VHF Receiver 
Frequency range RX
100 Hz - 30 MHz
(RX 35-55 / 108-174 MHz with optional converter) 
TX
Frequency stability
10 ppm. -10 to 50 C. 
Tuning steps
Filters
Receiver
Modulations
AM / AM-sync / FM / CW / USB / LSB / RTTY 
Sensitivity
Selectivity
All modes except FM
@ -6dB @ -60dB
6.0 kHz < 12.0 kHz
4.0 kHz < 8.0 kHz
2.3 kHz < 4.5 kHz
1.8 kHz < 3.6 kHz
.5 kHz < 1.5 kHz

FM mode only
12.0 kHz < 25.0 kHz 
Receiver system
Double conversion 
IF-frequencies
1st: 45 MHz
2nd: 50 kHz 
Image rejection
> 60 dB .1-1.5 MHz
> 80 dB 1.5-30 MHz 
Audio output
2.5 Watts, 4 ohms, < 10% distortion 
Transmitter
Modulations
RF-output
Connections
Antenna
SO-239 + Klemmen / schroeven 
Impedance
50/500Ω 
Electrical
Power requirements
11-16V DC or mains 
Current drain RX
Max 2 A 
TX
Physical
Dimensions (w×h×d)
334 × 134 × 330 mm (13.15 × 5.28 × 12.99 in)  
Weight
5.9 kg (13 lbs)  
Form factor
Desktop 
Manufactured
Between 1991 and 199x  
Other features
Memories
100 channels in 1 banks  
Usage
Amateur / Ham radio operators 
Manufacturer
Drake 
Model
R8
Features
RS232C interface
Clock/timer 
Manuals, Diagrams and Brochures
 
None available  
 
 
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