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R-31 (R-1)

R-31 ; Panasonic, (ID = 182033) Radio
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R-31 ; Panasonic, (ID = 182033) Radio
Panasonic,: R-31 [Radio] ID = 182033 227x222
Select picture or schematic to display from thumbnails on the right and click for download.
For model R-31 (R-1), Panasonic, Matsushita, National ナショナル (also tubes); Osaka
Country:  Japan
Manufacturer / Brand:  Panasonic, Matsushita, National ナショナル (also tubes); Osaka
Year: 1931 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 3: UY-227_Japan UX-226_Japan KX-112B
Main principle TRF (Tuned-Radio-Frequency but use of regeneration unknown)
Tuned circuits 1 AM circuit(s)
Wave bands Broadcast only (MW).
Power type and voltage Alternating Current supply (AC) / 100 Volt
Loudspeaker - This model requires external speaker(s).
Power out
from Model: R-31 - Panasonic, Matsushita,
Material Wooden case
Shape Tablemodel, Box - most often with Lid (NOT slant panel).

This is the first radio Matsushita has produced. The Panasonic museum pages and the Japan Radiomuseum list this model as R-31, but in the literature it's called R-1.

Winner of the 2nd Tokyo Central Broadcast Station (JOAK) contest in 1931.

Piano-finish wooden cabinet. Separate speaker unit.

Price in first year of sale 45.00 JPY
Source of data - - Manufacturers Literature

Model page created by Ernst Erb. See "Data change" for further contributors.

All listed radios etc. from Panasonic, Matsushita, National ナショナル (also tubes); Osaka
Here you find 2666 models, 2426 with images and 508 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.