DaveM wrote:
"bg" wrote in message news:g9uso7$2jt
...
bg is correct in that this transformer is a low impedance microphone-to-grid
matching unit. Its turns ratio is about 1:10, meaning that if your primary line
level voltage is 1VAC, then the transformer's secondary level is going to be
around 10VAC (assuming the impedances allow it). I don't think that's what
you're after.

Of course, you could always send the secondary into a resistive voltage divider
to get the level back down so the NE5534 input isn't overdriven. Better still,
connect the transformer in reverse; using the secondary as the input and the
primary as the output. That would reverse the turns ratio to 10:1, so the
output level would be 1/10 the input level. If you need to maintain the
frequency response characteristics of the transformer, then you need to
experiment with source and load impedances that the transformer sees.

A better choice would be a 1:1 ratio transformer; something like a 600:600 ohm
matching transformer.
--
Dave M

What microphone puts out 1 volt? Millivolts is more like it.

G²