The Bull Dawg. One ruff-tuff doo-hickey.
Or so it said on the face plate. It had a fatal flaw. The meter movement was originally a military-grade meter inside a hermetically sealed metal case with the glass crystal brazed to the metal can. Sealed, as in submersible. Had a multimeter Volts/Amps/Ohms scale. Carl broke the glass, cut the metal flange with tin snips and replaced the scale with his custom art work.
Just one problem. Now that the meter movement (and its magnet) are not sealed, there's nothing to prevent a tiny magnetic dust mote from clogging the gap between the meter's moving coil and the permanent magnet core. Sooner or later every Bulldawg meter will seize. A magnetic particle of some kind finds its way in there and the needle will hang. Doesn't take a very big particle. The gap between the coil and magnet is very thin.
No point trying to remove it, another one will find its way in there soon enough.
Haven't seen a Bulldawg that wasn't seized in years.
73
Or so it said on the face plate. It had a fatal flaw. The meter movement was originally a military-grade meter inside a hermetically sealed metal case with the glass crystal brazed to the metal can. Sealed, as in submersible. Had a multimeter Volts/Amps/Ohms scale. Carl broke the glass, cut the metal flange with tin snips and replaced the scale with his custom art work.
Just one problem. Now that the meter movement (and its magnet) are not sealed, there's nothing to prevent a tiny magnetic dust mote from clogging the gap between the meter's moving coil and the permanent magnet core. Sooner or later every Bulldawg meter will seize. A magnetic particle of some kind finds its way in there and the needle will hang. Doesn't take a very big particle. The gap between the coil and magnet is very thin.
No point trying to remove it, another one will find its way in there soon enough.
Haven't seen a Bulldawg that wasn't seized in years.
73