We had some mild weather last week so I tackled the project of replacing my HVAC. The furnace was shot and I didn’t want to go through another winter with a hole in the heat exchanger. While working in the attic I came across the first metal detector I ever bought. Forgot that I had kept it. Circa 1979…Treasure Sensor 1000. I was about 11 and had been saving my money. We had a department store called Edisons within walking distance. When I had enough saved I made a bee line to get this thing. What a disappointment! This machine was such a POS but it was really good to see it after all these years.
It works ok. But being a tech, I tried to improve it. Quite unstable. Hard to keep from drifting off. So I replaced the control with a 10 turn variable resistance, now easily set .
Wow! I sure remember that horrible drifting. I’m going to try your mod!