03-31-2025, 03:14 PM
This is strange to me. Maybe in over 50 years of working around swinging, analog meters I just never saw this, I have missed other things also along the way.
This morning I unboxed a V7 Heathkit and began investing it's innards. Looks clean has a dead carbon zink battery, not leaking yet? pulled it quickly. Noticed the 3 capacitors are original, so I plan to replace them check tubes and replaced the half weak 12au7.
Noticing the meter not setting on Zero, I decided to set it on zero. When I place my hand on the case to support it while I twist the adjustment screw the needle moves. I set the needle to zero but when I move my hand away the needle moves away from zero. Tricky little guy! So I don't put my hands close to the meter, instead l use a long screwdriver and zero the meter. With the meter set at zero I place my hand next to the meter and it jumps up swinging rather high stays up until I bring my hand back. It doesn't return to zero when it comes to rest. This is with no power on.[attachment=32248]
Bruce B
This morning I unboxed a V7 Heathkit and began investing it's innards. Looks clean has a dead carbon zink battery, not leaking yet? pulled it quickly. Noticed the 3 capacitors are original, so I plan to replace them check tubes and replaced the half weak 12au7.
Noticing the meter not setting on Zero, I decided to set it on zero. When I place my hand on the case to support it while I twist the adjustment screw the needle moves. I set the needle to zero but when I move my hand away the needle moves away from zero. Tricky little guy! So I don't put my hands close to the meter, instead l use a long screwdriver and zero the meter. With the meter set at zero I place my hand next to the meter and it jumps up swinging rather high stays up until I bring my hand back. It doesn't return to zero when it comes to rest. This is with no power on.[attachment=32248]
Bruce B
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
