• Country
• Japan

• Manufacturer / Brand
• Pioneer Corporation; Tokyo

• Year
• 1966–1970 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 142915

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 18

• Valves / Tubes
• 6AQ8 6AQ8 6AV6 6C9_Twin-Tetrode 12AX7 12AX7 12AX7 12AX7 12AX7 6BA6 6BA6 6AU6 6AU6 6BE6 6BQ5 6BQ5 6BQ5 6BQ5

• Number of Transistors

• Semiconductors
• OA70 OA70 SD-1 SD-1

• Main principle
• Superheterodyne (common); ZF/IF 455/10700 kHz

• Wave bands
• Broadcast (BC) and FM or UHF.

• Details
• Hi-Fi equipment

• Power type and voltage
• Alternating Current supply (AC) / 115; 230 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 30 W (40 W max.)

• Material
• Metal case

• from Radiomuseum.org
• Model: AM/FM Stereo Multiplex Receiver ER-420 - Pioneer Corporation; Tokyo

• Shape
• Book-shelf unit.

• Dimensions (WHD)
• 17.5 x 6 x 17.5 inch / 445 x 152 x 445 mm

• Notes

• A hi-fi stereo valve receiver with an AM/FM stereo tuner and integrated amplifier with power output of 2 x 15 watts RMS (THD < 1%, Frequency response 20-20,000kHz ±1dB) and total music power of 40 watts.

  AM/FM-Stereo-Receiver mit 2 x 15 Watt Sinus.

• Net weight (2.2 lb = 1 kg)
• 35 lb 0 oz (35 lb) / 15.890 kg

• Source of data
• -- Original prospect or advert

• Mentioned in
• - - Manufacturers Literature (1970 Pioneer Hi-Fi Stereo catalogue)

• Literature/Schematics (1)
• - - Manufacturers Literature (Service manual Pioneer ER-420)

• Literature/Schematics (2)
• - - Manufacturers Literature (Operating Instructions Pioneer ER-420)

• Author
• Model page created by Franz Scharner. See "Data change" for further contributors.

• Other Models

• Here you find 1140 models, 1125 with images and 200 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Pioneer Corporation; Tokyo