Hi all- I have a dead dbx 163x rackmount compressor. The power transformer is putting out 0 volts when unplugged from the rest of the circuit, so no drain from somewhere else upstream. It has a switching 110/220 voltage selector fed from the wall plug, that connects to the transformer primaries, and the transformer secondaries are three wires to a molex connector. I have verified that continuity from the wall plug through the functions of the switch are all solid. At the molex plug I get 0-0-0V So, the transformer has died.

I have another working unit, I pulled it's power section and tested it unplugged from the circuit, and I get 24.1-0-24.1 VAC.

So here's where I need help. I think I have done the math and found the solution, I just want someone to check my math and my logic before I pull the trigger on purchasing a replacement.

The rear of the unit lists the power requirements as AC 110V, 7 watts. So by Ohm's law (I=P/V) that means it draws 0.058A of current.

If I am reading everything correctly, I am now looking for a dual primary 48V center tapped transformer, with a current rating of upward of 60-70mA, yes?

Looking for those specs, I find a Hammond 186B48 that seems to fit the bill. Secondary current rating of 120mA, and it's almost a perfect match size-wise. The mounting holes are almost exact.

So, would someone please check my numbers and let me know if I am way off the mark, and if so, where did I screw up? Or, if my numbers are correct, any other options for a good transformer? At ten bucks, I would be very comfortable buying the Hammond. But if there's any other reliable options out there, I'd be interested to hear about them.

Much thanks in advance for your time and advice.

I have another working unit, I pulled it's power section and tested it unplugged from the circuit, and I get 24.1-0-24.1 VAC.

So here's where I need help. I think I have done the math and found the solution, I just want someone to check my math and my logic before I pull the trigger on purchasing a replacement.

The rear of the unit lists the power requirements as AC 110V, 7 watts. So by Ohm's law (I=P/V) that means it draws 0.058A of current.

If I am reading everything correctly, I am now looking for a dual primary 48V center tapped transformer, with a current rating of upward of 60-70mA, yes?

Looking for those specs, I find a Hammond 186B48 that seems to fit the bill. Secondary current rating of 120mA, and it's almost a perfect match size-wise. The mounting holes are almost exact.

So, would someone please check my numbers and let me know if I am way off the mark, and if so, where did I screw up? Or, if my numbers are correct, any other options for a good transformer? At ten bucks, I would be very comfortable buying the Hammond. But if there's any other reliable options out there, I'd be interested to hear about them.

Much thanks in advance for your time and advice.

## Comment