i have this wu meter and i don't know what to do with it
i want to use this in my audio amplifier ...some kind of balance or something else, but i don't know a schematic.
the cursor of the wu meter must move in the both directions (+ and -)
please help me
thanks

 

Hello,

The meter probably comes from an old FM radio.
These old radios did not have a good frequency lock in (AFC) and you used the meter to see if the tuning was OK.

Bertus

 

yes it is from an old radio
but a schematic for it, please

 

It's not a VU meter - http://en.wikipedia.org/wiki/VU_meter

What you have is a center zero meter. It may be a sensitive ammeter that indicates direction and magnitude of current. You might be able to check it if you have an adjustable power supply and some accurate resistors. The maximum deflection may be indicating on the order of +/- 50 microamps.

 

ok so in my amplifier i can't use it?
some kind of balance schematic

 

It's not useful in an amplifier. It is handy with a manually tuned radio receiver - http://en.wikipedia.org/wiki/Automatic_frequency_control

 

ok so in my amplifier i can't use it?
some kind of balance schematic

Well, you COULD use it, but for what? I don't have any dials on the front of my amp and I don't feel like I'm missing anything. You could perhaps - with a lot of difficulty - work out a way to have the dial correspond to the setting of your volume knob. But why?