Update for those who have been asking: Here are the specs on the custom SumR toroidal transformer (perfect for a 2 channel preamp with windings for 48V phantom and isolated digital control and/or metering).
- Dual Primaries @ 115VAC / 29VA each
- Secondary Winding #1: 44VAC / 8VA (perfect for generating 48V DC phantom)
- Secondary Winding #2: 20VAC / 14VA (to generate your positive rail)
- Secondary Winding #3: 20VAC / 14VA (to generate your negative rail)
- Secondary Winding #4: 9VAC / 14VA (originally designed as isolated source for digital control circuitry)
- Epoxy center (easy to mount) with a 7.2mm (5/16") center hole
- 12" wire leads
- 3.5" diameter x 1.3" height
I have a full spec sheet with more accurate measurements (including characteristics under full load) if you are interested just send me a message. Richard Sumr is respected for some of the highest quality in the lost art of custom-wound toroidals.
