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 made by Pioneer around 1966 to 1970. It belongs to a series that includes models like the LX-420 A, LX-34 B, LX-300, and LX-800, though its exact position within the lineup isn't documented. Identified across multiple sources as a valve receiver, it was designed for stereo FM and medium wave (MW) broadcast reception, featuring both MM and ceramic phono inputs alongside line-level connectivity.
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 Pioneer ER-420 was originally priced at approximately $210 in 1966. A recent listing on Facebook Marketplace noted one available for $275.00. Service manuals and operating instructions are available through various archive sites, indicating ongoing support for maintenance and repair.
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