The 670 series was expressly designed for ship board cabin use. The 670A has five ranges: .15-.38, .54-1.5 3.7-10.6 and 10.5-30 MHz. The fifth "range" is marked "G" which is for a gramophone (phonograph) input. The broadcast bands are marked on the dial. The vernier tuning scale is a mechanical bandspread scheme that provides a quick and accurate means to return to a previously logged frequency. The tuning indicator (DM70) is a green fluorescent tube. With no signal the glow will extend to its full length. When a signal is received the glow contracts.
- Desktop Amateur HF Receiver
- Frequency range RX
- 150-380 kHz / 0.54-30 MHz in four bands
- Frequency stability
- Tuning steps
- Receiver system
- Single Conversion Superheterodyne
- Image rejection
- Audio output
- 50 Ω
- Power requirements
- Mains (AC or DC)
- Current drain RX
- Dimensions (w×h×d)
- Form factor
- Between 1953 and 1960 in Great Britain
- Amateur / Ham radio operators
- • Speaker Output • Dial Lamp • Rack Handles • Tuning Indicator • Speaker • Phono Input • Vernier Tuning • Log Scale 0-2500 • Tone • Flywheel Tuning
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