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[AMPS] SB220 Grid meter

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Subject: [AMPS] SB220 Grid meter
From: (Bob Alexander)
Date: Sun, 11 May 1997 17:46:11 -0700
sounds to me like the .82 ohm grid meter shunt resistior has assumed a
different value.  If it becomes an open then the multimetr will try to
fly across the room (mine did). Suggest you replace the resistor and
add a 10 ohm 25 watt resistor from point B on the diode board to ground.
This will protect the multimeter should the .82 ohm shunt open in the
The added resistor introduces a slight error in the grid reading but its
nothing compared to the damage the multimeter can do when it flies
the room
73, Bob, W5AH

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