Ego Tripper
Well-known member
Hello all,
I about to assemble some preamps based on some Spectra Sonics cards and I plan on putting the pres and power supply in separate enclosures, joined by a shielded 4-pin XLR. For power I need plus & minus 24 V as well as 48 V for phantom. I picked up a Power One HCC24-2.4-A pretty cheaply for +-24 V and I'm hoping to build Rod Elliott's phantom power supply seen here: http://sound.westhost.com/project96.htm
My question concerns a warning in the "Construction" section of Rod's project-- he says:
I don't plan on running anything else off of this transformer, but I was planning on putting it in the same chassis as the Power One PSU and having them share a 0V supply line to the preamp enclosure. Can anyone have a look at Rod's schematic and tell me if there's a reason why this floating supply can't share it's 0V output and enclosure with another supply?
I about to assemble some preamps based on some Spectra Sonics cards and I plan on putting the pres and power supply in separate enclosures, joined by a shielded 4-pin XLR. For power I need plus & minus 24 V as well as 48 V for phantom. I picked up a Power One HCC24-2.4-A pretty cheaply for +-24 V and I'm hoping to build Rod Elliott's phantom power supply seen here: http://sound.westhost.com/project96.htm
My question concerns a warning in the "Construction" section of Rod's project-- he says:
It is extremely important that the transformer is not used to power other supplies or equipment. The centre-tap must not be connected to anything, and needs to be insulated to prevent contact. The supply circuit uses the full 30V AC in a floating configuration, and connection to another supply or rectifier will cause a short on the winding.
I don't plan on running anything else off of this transformer, but I was planning on putting it in the same chassis as the Power One PSU and having them share a 0V supply line to the preamp enclosure. Can anyone have a look at Rod's schematic and tell me if there's a reason why this floating supply can't share it's 0V output and enclosure with another supply?