Hi I repair clocks and watches to enable me to listen to the tick tock sound the clock or watch makes I use an amplifier made by L&R T300, the unit is very small and is powered by a 9v battery, you attach a sound pickup lead using dbl sided tape (I think it is a quartz pick?) as close as possible to the area of the clock\watch that is making the tick sound, this then allows me to set the clock\watch in beat.
My problem is the above unit producing a very loud feed back sound and a low volume tick sound. The electronic circuit is based around the LM386n-1 IC with an amp gain of 200 the power switch automatically turns off after 60 seconds.
Can any one suggest a solution other than bin it, that being the case I would like to build a circuit that would allow me to use a crocodile type clip as the sound detector, instead of the dbl sided tape method. Can you recommend a circuit with diagram.
Thank you for any assistance that you are able to offer.