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Desktop HF/VHF Receiver
Desktop Shortwave receiver
Desktop Transceiver

General

HAM bands ? 160m  80m  60m  40m  30m (WARC)  20m  17m (WARC)  11m (CB) 
Freq. stability 0.01% or less ? ?
Tuning steps ? Continuous Channelized

Receiver

RX-range 0.54-40 MHz 2609-19355 kHz
(526-2727 kHz optional)
26.965-27.255 MHz
Modulations AM   CW   SSB   AM   AM  
Sensitivity Better than 1-2 µV (10dB S/N) ? 0.4 µV for 10 dB S/N
Selectivity 6 positions ? 7 kHz @ -6 dB
21 kHz @ -60 dB
Filters 200Hz / 5.2kHz ? ?
Receiver system ? ? Crystal controlled single conversion superheterodyne
IF-freqs. 455 kHz ? 455 kHz
Image rejection ? ? ?
Audio output 1.5 watts at less than 10% distortion ? 3 W

Transmitter

TX-range - - 26.965-27.255 MHz
Modulations - - AM  
RF-output ? ? 2.8 W

Connections

Antenna Clamps / screws Clamps / screws -
Impedance 50/300Ω 50Ω 50Ω
Other - - -

Electrical

Power req. ? External power supply Mains
Current RX ? ? ?
TX - - ?

Physical

Manufactured Between 1957 and 1960 in USA Between 1930 and 1934 in USA Between 195x and 196x in USA
Dimensions 412 × 254 × 276 mm
(16.22 × 10.00 × 10.87 in)
? 143 × 178 × 290 mm
(5.63 × 7.01 × 11.42 in)
Weight ? ? 5.40 kg (11.9 lbs)
Form factor Base Station Base Station Base Station

Other features

Memories ? None 10 channels in 1 bank(s)
Usage Amateur / Ham radio operators Amateur / Ham radio operators Citizen Band (27Mc)
Features ? ? ?
Accessories ? ? ?
MPN NATIONAL-COMPANY-NC-000109 NATIONAL-COMPANY-SW-000005 E.F.-JOHNSON-MESSENGER-II