Iron Vane meter spike dampening

Discussion in 'General Electronics Chat' started by jvcmarine, Mar 19, 2015.

  1. jvcmarine

    Thread Starter New Member

    Mar 11, 2012
    I use an old Weston iron vane AC ammeter and volt meter along with a variac on my mains supply on my bench.
    Is there a way to damp the meter movement of the AC ammeter to keep it from slamming when applying a load, (switching off standby on a vacuum tube amp).
    This is an iron vane movement not a D'Arsonval.
    I was thinking maybe using diodes as any passive components would cause a shunt condition.
    any thoughts?


    V in
  2. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    back to back zeners can be used to clip AC peaks, but I dont know if you can find the needed 167 volt zeners.
    someone with more knowledge will be along shortly.

    edit: i see that you wanted to protect the ammeter and i focused on the volt meter.