Hello,
I have an instrument preamp for which I am trying to identify the proper power supply. There are several factors that are complicating the matter: A: there are no markings on the outside of the device B: the manufacturer has gone out of business C: there is significant reason to suspect that the manual may be incorrect.
I do know that it uses a dual output + and - power supply and that it is either +/-9V DC or +/-12 V DC.
So my question is whether or not one can identify which one it is by looking at the actual circuit inside the unit. It doesn't appear to be overly complicated inside. My thought was to look for voltage regulators and find out what voltage they would be looking for, but I'm not seeing any.
On a couple different places I see markings for +/- 9 volts, but I also know that the unit is supposed to be able to supply 12 volts of phantom power and I'm not sure if there is a way to dish out 12 volts of phantom power from a 9 Volt supply.
If I posted pictures, might someone here be able to help nail it down?
Any help would be appreciated!
I have an instrument preamp for which I am trying to identify the proper power supply. There are several factors that are complicating the matter: A: there are no markings on the outside of the device B: the manufacturer has gone out of business C: there is significant reason to suspect that the manual may be incorrect.
I do know that it uses a dual output + and - power supply and that it is either +/-9V DC or +/-12 V DC.
So my question is whether or not one can identify which one it is by looking at the actual circuit inside the unit. It doesn't appear to be overly complicated inside. My thought was to look for voltage regulators and find out what voltage they would be looking for, but I'm not seeing any.
On a couple different places I see markings for +/- 9 volts, but I also know that the unit is supposed to be able to supply 12 volts of phantom power and I'm not sure if there is a way to dish out 12 volts of phantom power from a 9 Volt supply.
If I posted pictures, might someone here be able to help nail it down?
Any help would be appreciated!