Hello. New to the site. I have a battery charger with a Beede 0-100A dc 3.5" ammeter. The part number is QAS-35. My shunt is a 100A input/50 mV output. The needle fell off the ammeter display. I am trying to find a direct replacement. I have attached a picture of the face of the meter. The needle has fallen to the bottom of the display and does not move. Thank you for any help.

 

So you can't buy the QAS-35 part anywhere?
Look for a 100A panel meter.
Here's an example replacement.

 

So you can't buy the QAS-35 part anywhere?
Look for a 100A panel meter.
Here's an example replacement.

Thank you for the reply. I am trying to locate a 3.5" display that doesn't require modifying my enclosure. I cannot find a QAS-35 anywhere yet, still looking.

 

Thank you for the reply. I am trying to locate a 3.5" display that doesn't require modifying my enclosure. I cannot find a QAS-35 anywhere yet, still looking.

Your link did have the correct size at Skycraft. Thank you again. Searched for a while with no match. This really helps.

 

Anything here that fits?
http://www.kdsimeter.com/

 

Analog meters are effectively old technology. Very few manufacturers making these now as digital meters have taken over.
You'll have to take what you can find.
A note: meters generally are sold with a specified mA for Full Scale Deflection. To measure voltage you put a resitor in series with the meter.
The faceplate can be anything you want it to be. Way back we would take a shop bought meter, take off the front window and paint on the markings we wanted (volts, amps and any full scale that suited us)

 

Way back we would take a shop bought meter, take off the front window and paint on the markings we wanted (volts, amps and any full scale that suited us)

KDSI will do that, even for small quantities.

 

Pretty interesting website, for the analog meter aficionados.
I particularly like the look of vibrating reed frequency meters. Even though they are marked in whole-Hertz increments, one can easily interpret fractions of a Hz by the relative magnitude of the adjacent reeds.

 

I se that the shunt resistor provides 50 millivolts at 100 amps. Probably a one milliamp meter with a series resistor can give you a full scale swing when you have the correct series resistor.

 

I se that the shunt resistor provides 50 millivolts at 100 amps. Probably a one milliamp meter with a series resistor can give you a full scale swing when you have the correct series resistor.

I think most of KDSI's meters have a 1mA movement. I ordered one for a 60mV shunt, and it was indeed a 1mA movement with a series resistor.

 

So it may work to get a meter the needed size and simply move the 100 amp scale from the failed meter to replace the scale. Then change the resistor to provide full deflection at 50 millivolts.

 

Thank you for the reply. I am trying to locate a 3.5" display that doesn't require modifying my enclosure. I cannot find a QAS-35 anywhere yet, still looking.

https://www.rfparts.com/panelmeters...eIGthMMh6YGfFd56Sb8c0_jnvyhO3A9o7eKLnau3OHJE0

You would just need to transfer or make the scaling