When starting with the TTSH build last year I prepared the Formant power supply, that I still had from the past, as kind of standalone unit. Meanwhile I realized that this would be a little too big to easily fit into the TTSH case I've built. I decided now to redo this part. I've bought two new transformers (one delivering 2 x 18V and one delivering 9V) that nicely fit into the bottom corner of my TTSH case. I've added an aluminum rail to hold the three 2N3055 power transistors and the power inlet on the backside of the case:
20160313_215647_8664crThe Formant power supply PCB now is mounted vertically on the side of the case, above the transformers:
20160313_215833_8665cLater I've added some earthed protection around the transformers:
20160320_171307_8669crThen I've created another front panel to hold the main power switch and the LED indicators for the +15V, -15V and +5V supplies. To be able to externally connect some electronics for experimenting, I've also mounted according outlets for +15V, -15V, +5V and ground. The same front panel will be used for a quartz tuning fork. This is an old little Elektor unit I also still have from the past, but I'm missing a quartz of 27.035 MHz to make it correctly generate a 440 Hz tone.
20160313_220328_8668crAlso this front panel is not perfect. I've put a transparent plastic foil over it for protection, but this gives a kind of strange effect.