Pioneer ER 420 (1966–1970)
A tube-based AM/FM stereo multiplex receiver produced by Pioneer during the late 1960s.
Overview
The Pioneer ER-420 is a tube-powered AM/FM stereo multiplex receiver. Pioneer made it around 1966 to 1970. It belongs to a series that includes the LX-420 A, LX-34 B, LX-300 and LX-800, though its exact position in the lineup isn't documented. Multiple sources identify it as a valve receiver. It was built for stereo FM and medium wave (MW) reception, with both MM and ceramic phono inputs plus line-level connections.
Specifications
| Product type | AM/FM Stereo Multiplex Receiver |
| Technology type | Tube/valve |
| Power output | 15 watts per channel into 16Ω (stereo) |
| Dimensions | 445 x 150 x 400 mm (WxHxD) |
| Input sensitivity | 2.7mV (MM), 29mV (ceramic), 200mV (line) |
| Tuning range | FM, MW |
| Original price | 210 US-$ (USA, 1966) |
Market
The ER-420 was originally priced at approximately $210 in 1966. A recent Facebook Marketplace listing had one for $275.00. Service manuals and operating instructions are available through various archive sites, so maintenance and repair info is not hard to find.
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