The instrument
The Orgaphon Tube Amplifiers are low frequency amplifiers. They were manufactured to produce sound for Hohner organs, accordions and guitars. Dr Orgaphon 50 MH probably came on the market in 1965. Dimensions (WHT) are 545 x 230 x 240 mm. The net weight is 15 kg.
Details
The Orgaphon 50 is equipped with 11 tubes (5 x ECC 83, ECL 86, EF 86, 4 x PL 84) and runs on AC power / 220 - 240 volts. The model requires external speakers. The bass amplifier has vibrato and reverb. 7 inputs, 4 of which are separately adjustable for volume. 2x input for direct connection to the power amplifier, 1x for tape recorder. 100 volt output. 2 outputs, switchable from 4 to 16 ohms. (Source: Radiomuseum.org)