Quote:
Originally Posted by Chris55000
Hi!
You also need to make sure the meter movement magnet hasn't lost any of it's magnetic field strength – to test for this, connect a 10k resistor in series with a fresh 1.5V AA battery to the Meter's (+) and (–) terminals with the PCB removed from the back – if the movement is sensitive enough for the circuit, the pointer should deflect ⅔ of the way–upscale, if the deflection is much less than this, the meter movement will need re–magnetising – other members who have more experience with movement problems than me can best advise on this point!
The normal f.s.d. sensitivity of the Heathkit Movements is 200uA nominal!
Chris Williams
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Ohms and DC ranges work, it's AC measurements that's the problem, so I think the meter movement is ok