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National HRO-500

Type: HF receiver
Frequency Range: 0.005-30 MHz (60*500 KHz bands)
Mode: AM/SSB/CW/FSK
Sensitivity: 0.5-30 MHz:
AM: <2 uV (10 dB S/N)
SSB/CW: <1 uV (10 dB S/N)
0.005-0.5 MHz:
25-200 uV (10 dB S/N)
Selectivity: N/A
Image rejection: 0.5-30 MHz: 80 dB average, 50 dB minimum
Voltage: 11-16 VDC or Mains 115/230 VAC
Current Drain: Max 200 mA @ 12 VDC + 590 mA for the pilot lamps
Aerial Input: 50 ohms, SO-239 and Hi-Z
Dimensions (W*H*D): 16.5 x 7.62 x 12.75"
Weight: 32 lbs
Manufactured: 1964-1972
Other: National's first solid state receiver
New price 1965 in the US: $1295 (without options)
Related Documents: User Manual (2.92 MB) Schematic (355 KB)