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Old 4th Jun 2021, 8:03 am   #1
resurgance
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Join Date: Apr 2021
Location: Nelson, New Zealand
Posts: 15
Default Hickok 539b bias gauge

Hi there,
I understand that Hickok is mainly US and AVO is more UK, so apologies if this is not quite the place for thjs question?
I have a 539b with a bias gauge sans adjuster but reading above zero.
Any ideas please on how to return this to zero?
It reads this way unpowered as well as powered.

Thanks
Stew Thorp
ZL2VA
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