DaxLiniere
Well-known member
Hey guys!
I run Puzzle Factory Sound Studios, once in Australia, now in London. I have B-gauge patchbays in my control rooms that I use to connect the wallboxes in my live rooms to my preamps/console.
I have been thinking it would be useful to build a 1RU strip with a whole lotta switches which can deliver phantom power to each of the individual B-gauge sockets, rather than using the phantom supplies in the preamps themselves.
But why? I hate patchbays in general, even more so when it comes to sending phantom through them. Even when properly cleaned and using brand new quality patch cables, a little bump can sometimes cause a loud crackle.
If phantom was wired directly to the back of the patchbay (at the cables that run to the XLR wall boxes), it would eliminate this PITA.
A question I have; would this affect crosstalk and, if so, is there a way to eliminate that?
I believe the phantom power spec is 100mA max per device, so with that in mind, a 5A linear regulator will do the job easily. To be honest, 3A is probably enough, knowing that many mics won't need phantom and very few will draw the entire 100mA.
There are a few low-noise regulators that will do 48v output such as https://www.ebay.co.uk/itm/Assembled-LT1083-Adjustable-HIFI-Linear-Regulated-Power-Supply-Board-Dual-0-48V/253477392391?hash=item3b046e1007:g:iowAAOSwa2lZfOFZ
I'm happy to buy expensive 6k8 resistors and carefully match them for each output.
Any thoughts on how best to approach this project?
All the best,
Dax.
I run Puzzle Factory Sound Studios, once in Australia, now in London. I have B-gauge patchbays in my control rooms that I use to connect the wallboxes in my live rooms to my preamps/console.
I have been thinking it would be useful to build a 1RU strip with a whole lotta switches which can deliver phantom power to each of the individual B-gauge sockets, rather than using the phantom supplies in the preamps themselves.
But why? I hate patchbays in general, even more so when it comes to sending phantom through them. Even when properly cleaned and using brand new quality patch cables, a little bump can sometimes cause a loud crackle.
If phantom was wired directly to the back of the patchbay (at the cables that run to the XLR wall boxes), it would eliminate this PITA.
A question I have; would this affect crosstalk and, if so, is there a way to eliminate that?
I believe the phantom power spec is 100mA max per device, so with that in mind, a 5A linear regulator will do the job easily. To be honest, 3A is probably enough, knowing that many mics won't need phantom and very few will draw the entire 100mA.
There are a few low-noise regulators that will do 48v output such as https://www.ebay.co.uk/itm/Assembled-LT1083-Adjustable-HIFI-Linear-Regulated-Power-Supply-Board-Dual-0-48V/253477392391?hash=item3b046e1007:g:iowAAOSwa2lZfOFZ
I'm happy to buy expensive 6k8 resistors and carefully match them for each output.
Any thoughts on how best to approach this project?
All the best,
Dax.