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National Company HRO-500

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Desktop Shortwave receiver

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

Specifications
Type
Desktop Amateur HF Receiver 
Frequency range RX
0.005-30 MHz (60×500 kHz bands) 
TX
Frequency stability
Tuning steps
Filters
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
14.5 kg (32 lbs)  
Form factor
Desktop 
Manufactured
Between 1964 and 1972 in USA 
Other features
Memories
Usage
Amateur / Ham radio operators 
Manufacturer
National Company 
Model
HRO-500
Features
 
Manuals, Diagrams and Brochures
 
None available  
 
 
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