National Company HRO-500 Desktop Shortwave receiver

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National's first solid state receiver New price 1965 in the US: $1295 (without options)

Frequency range

RX-range
0.005-30 MHz (60×500 kHz bands)
TX-range
-
HAM bands
-
Stability
-
Tuning steps
-
Filters
-

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Receiver

Modulations
AM   CW   SSB   FSK  
Sensitivity
0.5-30 MHz:
AM: <2 µV (10 dB S/N)
SSB/CW: <1 µV (10 dB S/N)
0.005-0.5 MHz:
25-200 µV (10 dB S/N)
Selectivity
-
Receiver system
Triple conversion superheterodyne
IF-frequencies
1st: ? MHz
2nd: ? MHz
3rd: 230 KHz
Image rejection
0.5-30 MHz: 80 dB average, 50 dB minimum
Audio output
-

Transmitter

Modulations
-
RF-Output
-

Connections

Antenna
Hi-Z
Impedance
50 Ω

Electrical

Power requirements
11-16V DC or mains 115/230 VAC
Current drain RX
-
TX
-

Physical

Dimensions (w×h×d)
420 × 195 × 320 mm (16.54 × 7.68 × 12.60 in)
Weight
14.50 kg (32.0 lbs)
Form factor
Base Station
Manufactured
Between 1964 and 1972 in USA

Other features

Memories
-
Usage
Amateur / Ham radio operators
Features + options
-
Accessories
-

Manuals, diagrams and brochures

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