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You can pull-out same transformer from old pocket radios.
Before transformerless power amplifiers, in output stage work
two transformers: the phase-changer for driving for output
transistors,and other for speaker-matching. Both center-tapped.
You need a phase-changer.
Each coil has (at least) two wires - the begining of the coil and the end.
Ocasionally, manufacturers will add a middle wire to the coil. Now you have the begining, the center connection, and the end. The middle wire is usually labled (CT) for center tapped. Check out some schematics and look for this condition.
This is the first time I'm posting :roll: so please bare with me.
I am having difficulty finding a 1k to 200K mini audio transformer, here in the UK. I understand Maplins used to do a 1k to 20K but it seems that has been discontinued :cry:
Does anyone know any other outlets where I can buy one from? Product code? any info would be great thanks. It doesn't have to be a 1k to 200k, it can be less even.
I am basically building an electronic dog collar, which would administer a shock if the dog goes over the invisible boundary (for my final year project), the shock has to be less than the usual 'stun gun', I have finished the detection bit, but am only having probs with the transformer.