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Appendix
Specifi cations
General DX-SR8 ALL MODELS
Operating mode J3E (USB, LSB), A3E (AM), A1A (CW), F3E (FM)
Number of memory channels 600 channels simplex
Antenna impedance 50 ȍ unbalanced
Frequency stability ± 1ppm
Power requirement 13.8 V DC ±15 % (11.7 to 15.8 V)
Ground method Negative ground
Current drain Receive 1.0 A (max.) 0.7 A (Squelched)
Transmit 20 A
Operating temperature -10 °C to 60 °C (+14 °F to +140°F)
Dimensions 240 (w) × 94 (h) × 255 (d) mm (Projections not included)
(9.45” (w) × 3.7” (h) × 10” (d))
240 (w) × 100 (h) × 293 (d) mm
(9.45” (w) × 3.94” (h) × 11.54” (d))
Weight Approx. 4.1 kg (9 pounds)
Transmitter
Power output SSB, CW, FM 100 W (Hi) Approx.10 W (LOW) Approx. 1 W (S-LOW)
AM 40 W (Hi) Approx. 4 W (LOW) Approx. 0.4 W (S-LOW)
Modulation system SSB Balanced modulation
AM Low power modulation
FM Reactance modulation
Spurious emissions Less than -50 dB (Less than -45 dB in 30 m band)
Carrier suppression More than 40 dB
Unwanted sideband More than 50 dB (1 kHz)
Maximum FM deviation ± 2.5 kHz
Receiver
Receiver type Double conversion superheterodyne
Sensitivity SSB
CW
(0.15 to 1.8 MHz) 0 dBu (1 uV)
(1.8 to 30 MHz) -12 dBu (0.25 uV)
AM (0.15 to 1.8 MHz) +20 dBu (10 uV)
(1.8 to 30 MHz) +6 dBu (2 uV)
FM (28 to 30 MHz) -6 dBu (0.5 uV)
Intermediate frequency 1
st
71.75 MHz 2
nd
455 kHz
Selectivity
SSB, CW, AM (narrow)
2.4 kHz/-6 dB 4.5 kHz/-60 dB
AM, FM 6 kHz/-6 dB 18 kHz/-60 dB
Spurious and image rejection ratio More than 70 dB
Audio output power More than 2.0 W (8 ȍ,10 %THD)
RIT variable range ± 1.2 kHz
DX-SR8
Microphone impedance 2 kȍ
Transmit Frequency coverage 1.6 MHz - 29.99999 MHz
Receiver Frequency coverage 30 kHz - 34.99999 MHz
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