The Murphy A684 is a British-made, seven-valve table radio introduced in August 1960 by Murphy Radio Ltd of Welwyn Garden City, Hertfordshire. It was one of Murphy's higher-quality domestic receivers, combining VHF/FM reception with traditional medium and long wavebands.
The A684 was essentially the wooden-cabinet version of the Murphy A674, which had been introduced in June 1960. Both models shared the same basic electronic design.
Valves:
- 6L12: VHF/FM front-end
- 6C12: frequency conversion
- 6F18: intermediate-frequency amplification
- 6LD12: detection and audio functions
- 6P15: audio output
- EZ80: HT mains rectifier
- EM84: magic-eye tuning indicator
The EM84 tuning indicator is a particularly appealing feature. It produces a green illuminated display that changes as the receiver is tuned to a station.
The 6P15 output valve provides the audio power to drive the loudspeaker system, while the EZ80 supplies the high-tension DC voltage required by the receiver.
The service manual for this radio is available in the Members’ Area.
