Emperor-TK
Well-known member
OK, so it's not a whole mixer, but a few channels racked up to look like one...
The channels are still stock. I'll probably play around with capacitor upgrades in the future. I know that some of the caps must have drifted, because they all have slightly different tonalities to them. But for now, I am sort of digging on the slightly raunchy sound that they have.
I put Edcor WSM600/600 xformers on two of the outputs. Like I mentioned in a previous thread, I'm not too crazy about these. There seems to be a loss in high end and detail compared to the transformerless (unbalanced) output. I wired in phantom power switches for each channel and put new polarity switches at the output transformers. The inputs and outputs are hardwired to my box, but I kept the card connectors for easy removal of the channel strips.
The chasis is made out of 1/4" plywood and shielded with copper flashing for roofs. That's a very cheep way of shielding a wooden box. Each phantom switch also drives a status LED. The gutted steel chasis below is from a microATX computer power supply. This holds the output transformers. Power connections are made through the cinch connector. The unit takes +48V and drops a rail down to ~45V for the op amps through a string of diodes. I am currently running the units off my bench supply, but I have a 48V linear supply on the way from Mouser.
Edcor inside... It looks like the diodes on the terminal strip are touching the steel chasis, but they are actually pretty far away. It's all a little bit ghetto, but it works.
The whole reason to "rack" the PM1000's in a mini-mixer format was to fit into a blank space I had in my Argosy desk.
Home sweet home.
-Chris
The channels are still stock. I'll probably play around with capacitor upgrades in the future. I know that some of the caps must have drifted, because they all have slightly different tonalities to them. But for now, I am sort of digging on the slightly raunchy sound that they have.
I put Edcor WSM600/600 xformers on two of the outputs. Like I mentioned in a previous thread, I'm not too crazy about these. There seems to be a loss in high end and detail compared to the transformerless (unbalanced) output. I wired in phantom power switches for each channel and put new polarity switches at the output transformers. The inputs and outputs are hardwired to my box, but I kept the card connectors for easy removal of the channel strips.
The chasis is made out of 1/4" plywood and shielded with copper flashing for roofs. That's a very cheep way of shielding a wooden box. Each phantom switch also drives a status LED. The gutted steel chasis below is from a microATX computer power supply. This holds the output transformers. Power connections are made through the cinch connector. The unit takes +48V and drops a rail down to ~45V for the op amps through a string of diodes. I am currently running the units off my bench supply, but I have a 48V linear supply on the way from Mouser.
Edcor inside... It looks like the diodes on the terminal strip are touching the steel chasis, but they are actually pretty far away. It's all a little bit ghetto, but it works.
The whole reason to "rack" the PM1000's in a mini-mixer format was to fit into a blank space I had in my Argosy desk.
Home sweet home.
-Chris
