Adam Inglis wrote:Learning all the time, as Benny Hill used to say.
My local emporium didn't have any cartridge pickups of course, but it did stock some cheap little piezo transducers they called "buzzers" so I grabbed a couple. One type only responded to DC, so that was no good, but I had more luck with the other one. I had to crack the case to get to the transducer
If you're prepared to go mail order, you don't have to crack the cases ;)
I've bought some of these in the past: