WESTON Ammeter Model 354 for 1934 VL

[leomags]

I have one of these ammeters (non-HD) with dial readings of + to - 30 amps. How does this ammeter work in a VL when the dail readings for the HD only go from
+ to - 10 amps. Is the face plate the only difference or is there something else?

[bselph]

Check with Kevin Flanagan at Indian Gauge Co.

http://indiangauge.com/INDIAN%20WEBS...0PAGE%202.html

[leomags]

Thanks Bob

[leomags]

This is the answer which Kevin provided:

The turns ratio is different in the 10-0-10 amp gauge as opposed to the 30-0-30 amp. The higher the amperage reading the less turns ratio in the two coils inside the gauge. You also have to wind them in the correct direction or they cancel each other out. I use to rebuild these and rewind them but have retired from the amp gauge business. They weren't cheap to rebuild as I had a number of them that ran around $300.00 to rebuild. I don't know of anyone rebuilding them at this time.

[MMasa]

I always figured that it was as simple as the shunt resistor being a lower ohm value than the -10 to +10 version? I would think that Kevin would know for sure though.

[leomags]

Just a post script to this, there MAY be a lot of folks buying what they think is a correct 10-0-10 Harley ammeter for their restoration when in reality they are buying a Weston ammeter model 354 that is a 30-0-30 type with a new Harley 10-0-10 face plate. I believe it will fuction but not be giving the user correct readings.