Hello. I repair and make clocks and pocket watches etc, I need a circuit for a small hand held battery powered amplifier, with a sound pick up lead, that will amplify the tick of a clock/pocket watch; I need to be able to hear the tick so that I can set the clock in beat.
I need to be able to clip the sound pickup lead very close to the balance spring, there is very limited space. Professional units have a crocodile clip that acts as the pickup?? Unfortunately these units are very expensive.
Can any one offer any advice? Thank you Roger