Since a couple of people are still interested in summing boxes, I'd like to post my latest (and last) summing device here:
It's a 18 channel (2x8 per sub-d plus two additional rear inputs) summing box with a Neuman V 475 2C summing amp.
I used Volker's POSPSU.
I've designed a little PCB that holds the resistors for channel 3-8 plus the 'daisy-chain' connectors.
One can connect as much 8-channel PCBs as wanted.
The resistors for the swichable first two channels of each PCB are soldered directly to the switches.
Some details:
It's a 18 channel (2x8 per sub-d plus two additional rear inputs) summing box with a Neuman V 475 2C summing amp.
I used Volker's POSPSU.
I've designed a little PCB that holds the resistors for channel 3-8 plus the 'daisy-chain' connectors.
One can connect as much 8-channel PCBs as wanted.
The resistors for the swichable first two channels of each PCB are soldered directly to the switches.
Some details: