The instrument
The Porta-B dates from 1971, and was a re-imagined L-100 spinet organ - in fact it was originally called the L-100P. The top half consisted of the two 44-note manuals, playing controls and tone-wheel generator while the amplifier and 13-note bass pedal were in the base.
Details
The Porta-B has 2 keyboards with 44 keys each from F to C, 9 drawbars for top, 7 for bottom, 1 for pedal. Built-in are an ensemble preset for trumpet, clarinet and full organ, reverb 1 and 2 as well as reverb ( I and II combined), 3 vibrato bars for 6 vibrato variations or chorus/vibrato, a volume soft and a brilliance for a brighter sound.
The top weighs 68 kg, the separate pedal box 22 kg.