This unit was sent to me for repair. The pcb quality looks similar to the one on Disco Freqs site. I don't believe they are the same unit as there are other differences.analogguru wrote:
I believe much, but I can´t believe that this hand-painted pcb has been manufactured by Tesla Vrable, even when components look like old czech/russian production.
maybe somebody exchanged the PCB ?
It is a dual supply version with the battery snaps wired in parallel to an external DIN connector. The IC's are standard 741 pinouts with the DIP sockets extended to the board with leads. The board looks like it was designed for TO-5 packages. The circuit uses two (LP,HP) active filter sections mixed with the dry signal. I was surprised to see the low qualityWe´ll see, maybe it´s the single supply version (LM 324) made with single op-amps.
PCB work in a commercial effect, but the unit sounded fine after repair.