schrobbelbop said:
Changed transformer connection and my gssl WORKS! great!
thanks harpo.
Only 1 thing is not working. the turbo board.
When switched in constant compression. not reacting on audio but voltage from the treshold control.
the turbo vca 2180 is getting VERY hot. power feed is okay TL074 seems okay when swapped with main pcb.
Love this forum and my new born gssl
congrats, half way there.
The 2180 shouldn't get hot. You put the chip in in the right direction ? (VCA-pin1 towards the pin-headers side / same as VCA-pin8 next to the expat headphone sign)
Turbo board measures +12V at TL074-pin4 and -12V at TL074-pin11 ?
Double-check parts values and orientation and check, the turbo input connects to the correct side of the lifted 47K and returns to the correct side of the 100R on main pcb.
If you made your gssl mode-switchable, the lifted side of the 47K connects to the pole of a maybe SPDT switch and throw side of this switch either returns to the open pcb hole of this 47K resistor for Aarhus-mode or to the input of the turbo board for Oxford-mode instead.
Leave out R16 for the 21
80 as on main pcb, as this 47R connecting to VCA-pin4 is only needed for a DBX2150. (The other 47R of the 470R/47R voltage divider at VCA-pin3 is still needed).
Good luck