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VHF Transceiver
Desktop Shortwave Transceiver
Desktop ULF/VLF Receiver

General

HAM bands 6m  80m  40m  20m  15m  10m  2000m 
Freq. stability ? ± 50 cps per hour after warm up ?
Tuning steps Continuous ? Continuous

Receiver

RX-range 50-54 MHz 10-80 m 15-500 / 500-1500 kHz (2 ranges, 7 bands)
Modulations AM   CW   AM   CW   SSB   AM   CW   FSK  
Sensitivity ? 0.5 µV for 10 dB S/N in SSB mode 6 µV
Selectivity ? SSB: 2.8 kHz (-6 dB) ?
Filters ? ? 0.1 / 1 / 2 / 4 / 8 kHz
Receiver system ? Double conversion superheterodyne Double conversion cuperheterodyne, including circuit arragement for cancelling drift of crystal oscillator (34 tubes)
IF-freqs. ? ? ?
Image rejection ? ? ?
Audio output ? Requires external speaker 500 mW unbalanced, 10 mW balanced

Transmitter

TX-range 50-54 MHz 10-80 m -
Modulations AM   CW   AM   CW   SSB   -
RF-output 1 W AM: 100 W (input), SSB: 200 W (PEP input), CW: 200 W (input) ?

Connections

Antenna - SO-239 + Clamps / screws Proprietary
Impedance 50Ω 25/100Ω 125Ω
Other - - -

Electrical

Power req. 12V DC (8R14 / C batteries) Mains (NCX-A) Mains (115/230 V AC)
Current RX 50 mA ? 250 W with oven on, 150 W when oven off
TX Max 400 mA ? -

Physical

Manufactured Between 1976 and 19xx in Japan Between 1965 and 196x in USA Between 1951 and 19xx in USA
Dimensions 165 × 63 × 185 mm
(6.50 × 2.48 × 7.28 in)
350 × 165 × 310 mm
(13.78 × 6.50 × 12.20 in)
483 × 267 × 438 mm
(19.02 × 10.51 × 17.24 in)
Weight 1.50 kg (3.3 lbs) 10.40 kg (22.9 lbs) 37.20 kg (82.1 lbs) including power supply PP-621/URR
Form factor Unknown Base Station Base Station

Other features

Memories None None None
Usage Amateur / Ham radio operators Amateur / Ham radio operators Amateur / Ham radio operators
Features ? ? Operating altitude up to 10,000 feet
Accessories ? NCX-A Power supply / speaker ?
MPN MIZUHO-MK-000610 NATIONAL-COMPANY-NCX-000005-MKII COLLINS-R-000389/URR