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Desktop Shortwave Transceiver
Mobile 10m Transceiver
Desktop Shortwave Transceiver

General

HAM bands 80m  40m  20m  15m  10m  10m  160m  80m  40m  20m  15m  10m 
Freq. stability ± 50 cps per hour after warm up ? ?
Tuning steps ? 10 kHz ?

Receiver

RX-range 10-80 m 28 MHz (80 channels) 10-160 m
Modulations AM   CW   SSB   AM   CW   USB   LSB   CW   USB   LSB   FSK  
Sensitivity 0.5 µV for 10 dB S/N in SSB mode ? 0.33 µV for 10 dB S+N/N at 10m (2 kHz bandwidth)
Selectivity SSB: 2.8 kHz (-6 dB) ? SSB: 2 kHz, 1.5:1 (-6 dB)
FSK: 1200 Hz, 2:1

Optional:
CW: 400 Hz, 4:1 and 300 Hz, 2:1
Filters ? ? ?
Receiver system Double conversion superheterodyne ? ?
IF-freqs. ? ? ?
Image rejection ? >50 dB > 60 dB
Audio output Requires external speaker Internal speaker 1 W

Transmitter

TX-range 10-80 m 28 MHz (80 channels) 10-160 m
Modulations AM   CW   SSB   AM   CW   USB   LSB   CW   USB   LSB   FSK  
RF-output AM: 100 W (input), SSB: 200 W (PEP input), CW: 200 W (input) 18 W 1-150 W (130 W max above 28 MHz)

Connections

Antenna SO-239 + Clamps / screws SO-239 SO-239
Impedance 25/100Ω 50Ω 50 Ω
Other - - -

Electrical

Power req. Mains (NCX-A) 13.8V DC Mains (115/230 V, 50-400 Hz)
Current RX ? ? 100 W
TX ? ? 400 W

Physical

Manufactured Between 1965 and 196x in USA Between 197x and 19xx in Japan Between 1971 and 197x in USA
Dimensions 350 × 165 × 310 mm
(13.78 × 6.50 × 12.20 in)
? 413 × 184 × 356 mm
(16.26 × 7.24 × 14.02 in)
Weight 10.40 kg (22.9 lbs) ? 15.90 kg (35.1 lbs)
Form factor Base Station Mobile Base Station

Other features

Memories None 80 channels in 1 bank(s) ?
Usage Amateur / Ham radio operators Amateur / Ham radio operators Amateur / Ham radio operators
Features ? ? Dual VFO, built-in keyer and full QSK Advanced features for such an old radio.
60 dB attenuator
Accessories NCX-A Power supply / speaker ? ?
MPN NATIONAL-COMPANY-NCX-000005-MKII SOMMERKAMP-TS-000310DX SIGNAL/ONE-CX-000007A