JW
Well-known member
My console runs on +/-24VDC rails. (It's a Yamaha PM2000) I'm in the process of building Jeff Steiger's API summing section clone.
My desire is to use the existing power rails, but I thought I'd pick folks' brains here first.
In the API summing buss, there are 4 DOA's. I want to be able to swap DOA's in and out and compare. Right now I have a bunch of GAR2520 kits as well as some of the GAR Melcor style kits, a couple Jensen style opamp kits from Whistlerock, and some original Hardy 990C's that are perfectly happy running at +/-24V. I want to be able to listen and pick and choose from all of these, but there is obviously a discrepancy concerning what some of these opamps want to run at and what is available.
When I bought the 2 Hardy 990c's (which are awesome BTW) I made sure to get the one's that are built to be +/-24V capable. I think they'll probably be happy running at less, but I'll have to check on that.
Otherwise, most of these opamps want +/-18V at the most.
There's obviously a few options, but I wonder what you guys would recommend?
I could use the console's existing voltage rails and drop the voltage going into the opamps individually with 1 approximately 7V zener diode in series on both rails.
Or I could build a separate power supply just for the API summing buss.
There are probably other options I'm not thinking of.
What would you folks recommend?
My desire is to use the existing power rails, but I thought I'd pick folks' brains here first.
In the API summing buss, there are 4 DOA's. I want to be able to swap DOA's in and out and compare. Right now I have a bunch of GAR2520 kits as well as some of the GAR Melcor style kits, a couple Jensen style opamp kits from Whistlerock, and some original Hardy 990C's that are perfectly happy running at +/-24V. I want to be able to listen and pick and choose from all of these, but there is obviously a discrepancy concerning what some of these opamps want to run at and what is available.
When I bought the 2 Hardy 990c's (which are awesome BTW) I made sure to get the one's that are built to be +/-24V capable. I think they'll probably be happy running at less, but I'll have to check on that.
Otherwise, most of these opamps want +/-18V at the most.
There's obviously a few options, but I wonder what you guys would recommend?
I could use the console's existing voltage rails and drop the voltage going into the opamps individually with 1 approximately 7V zener diode in series on both rails.
Or I could build a separate power supply just for the API summing buss.
There are probably other options I'm not thinking of.
What would you folks recommend?