I seem to have a problem with the octave divider of my F note in my Philicorda GM751 (full transistor version), as all F are in the octave of the highest one and get weaker the lower I go. I was sure to have located the problem in the first octave divider after the oscillator and tried today to exchange the transistors here, didn't change anything. (Due to the fact that these transistors were vintage ones bought on ebay it could still be them but I don't think so). So my next step would've been the surrounding capacitors:
Does anyone know what kind are used in the octave dividers of the full transistor GM751? Info about those used in a GM752 could also help, as it seems to be the same technology. I have a manual for a GM751, but that refers to the tube one, so it's built differently. The manual of the GM752 names the capacitors in question "C12, C13 and C14", but the index doesn't tell anything about their values.
Thanks so much Miro
Last Edit: Jul 11, 2020 13:50:22 GMT -5 by miroschnee