The instrument
In 1961, the Philips AG-7400 organ appeared on the market as a prototype, a four-octave, single-manual version with 49 keys, various audio inputs and outputs, foot sills, three stops and a one-finger automatic chord system. It did not have a system amplifier. The Philicorda AG-7500/00 came onto the market at the beginning of 1963, as well as identical models with the designations AG-7500/11 (English) and AG-7500/22 (German). The AG-7600 tube amplifier with loudspeakers is fitted under the AG-7500. In 1965 Philips introduced the 750 series, whose instruments had six instead of four knobs as well as spring reverb, vibrato effect and a built-in amplifier. (Wikipedia)
Details
The AG-7500 is an all-tube organ with the AG-7600 tube amplifier. 10 oscillators with tube amplification by 8 ECC83, 1 ECL82, 1 EZ80 and the neon tube frequency dividers with 1 ZZ1000, 3 Z70U and 70 ZA1001 are built in. It also has 5 rockers for tone colours and a foot position 8-4-2 switchable to 4 different tone colours. Vibrato is also built in.
A switch controls three presets, preset 1 with selected registration over the entire keyboard, preset 2 with 4 and 2 foot fixed setting in the sound colour Vox 1, preset 3 with chord mode.
The separate tube amplifier with 2 x 3.5 watt ECC86 and built-in tube spring reverb can be adjusted from small to large.