Hi Guys,
I just thought I'd run this one past you to see what your opinions were. I discussed this with Peter (Clintrubber) a while back, but I can't remember a decisive conclusion!
Would the OEP 262A2E 1:2 mic transformer be suitable as a mic pre output transformer?
Rough specs:
Impedance ratio = 600:2.4K
Primary resistance = 2*9.6 = 19.2 Ohms
Secondary resistance = 2*55 = 110 Ohms
"Max Power" = 100mW@300Hz (20dBm), 2.5mW@50Hz (4dBm), 1mW@below 30Hz (0dBm) - for less then 1%THD.
Taken from:
http://www.canford.co.uk/commerce/resources/catdetails/2739.pdf
and http://www.oep.co.uk/
What I was asking myself was, does the power through the transformer not depend on the load at the mic preamp's output? Less current will flow into a 10K input compared to a 600 Ohm input, so therefore less power as I would imagine.
It also boils down to what sort of levels I will be pushing out of the mic circuit. i was planning on using them for an A*PI 312 circuit configured normally as 1:2. Similarly, it also boils down to how much distortion I can tolerate.
Whilst it's always best to try these things in practice, I'd rather not try if someone is of the opinion that this transformer choice is poor. I know that they have been used for this purpose in the past, but I'd like to be more sure.
Cheers,
Roddy
I just thought I'd run this one past you to see what your opinions were. I discussed this with Peter (Clintrubber) a while back, but I can't remember a decisive conclusion!
Would the OEP 262A2E 1:2 mic transformer be suitable as a mic pre output transformer?
Rough specs:
Impedance ratio = 600:2.4K
Primary resistance = 2*9.6 = 19.2 Ohms
Secondary resistance = 2*55 = 110 Ohms
"Max Power" = 100mW@300Hz (20dBm), 2.5mW@50Hz (4dBm), 1mW@below 30Hz (0dBm) - for less then 1%THD.
Taken from:
http://www.canford.co.uk/commerce/resources/catdetails/2739.pdf
and http://www.oep.co.uk/
What I was asking myself was, does the power through the transformer not depend on the load at the mic preamp's output? Less current will flow into a 10K input compared to a 600 Ohm input, so therefore less power as I would imagine.
It also boils down to what sort of levels I will be pushing out of the mic circuit. i was planning on using them for an A*PI 312 circuit configured normally as 1:2. Similarly, it also boils down to how much distortion I can tolerate.
Whilst it's always best to try these things in practice, I'd rather not try if someone is of the opinion that this transformer choice is poor. I know that they have been used for this purpose in the past, but I'd like to be more sure.
Cheers,
Roddy