Heath Company (Heathkit) · Heathkit hi-fi kits

Heathkit AA-121

Integrated valve unit kit, 20 W per channel, list price $89.95 in kit form.

Catalogue code: AA-121
Years: 1964
Type: valve amplifier kit
Valves & speakers: Integrated valve amplifier kit, 20 W per channel, list price $89.95 in kit form
Lifecycle: retired
Confidence: Medium

Specifications

Technology: tube
Channels: 2
Inputs_outputs: phono, tuner, tape

Safety

Valve chassis: HT rails stay live after switch-off; never power up on original electrolytics. Check the output transformers and the power transformer for overheating - replacements are unobtainable.

01 / Witnesses

What applies here

Marks that can be entered for this maker: 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 1964; 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.