I am looking for a transformer to couple a 10W audio signal to a resistive load.
It needs to have a "flatish" frequency response from 20Hz to 10KHz, or else vary no more than about 25% over the above range.
Turns ratio should be relatively low, preferably 1:1. Input impedance is the usual 4-8 Ohms.
I have tried a variety of off-the-shelf mains and PA transformers. They either have too high a turns ratio or patchy response.
Surprisingly, the best was an old ignition transformer. Flat from 5Hz to 10KHz. But the turn ratio is way too high, and I only have one.
Can anyone please suggest something that is ready made and not too expensive?
Robrt Stevens