Quad (Acoustical Manufacturing) · Quad valve era

Quad FM Mono Tuner

Quad's long-running valve FM tuner, made for twelve years alongside the Quad II and QCII/22.

Catalogue code: FM Mono Tuner
Years: 1955–1967
Type: valve FM tuner
Valves & speakers: Mono valve FM tuner, 25,000 built - the tuner of the Quad II era
Lifecycle: retired
Confidence: High

Specifications

Technology: tube
Channels: 1
Inputs_outputs: FM antenna, line out to control unit

Safety

UK valve chassis: mains-derived HT rails stay charged after switch-off; original Hunts/TCC/Erie capacitors and the mains transformer are the two failure points. Value is set by untouched transformers and original cosmetics (silver/black livery), not by the valves fitted.

01 / Witnesses

What applies here

Marks that can be entered for this maker: Serial number, Model / catalogue number, British capacitor code (Hunts, Mullard), Japanese capacitor code (Nichicon, Chemi-Con, ELNA), EIA component code, Version & era marker.

02 / Bounds

The model year is a floor

Nothing predates 1955; components only push the date later.

03 / Value

What moves the price

Sold-price aggregates are not collected yet, so the archive gives no figure — condition, originality of the transformers and a documented recap move this model more than any list price.