from ; http://www.somis.org/sb-220ci.html
"6. Meter damage can be avoided by connecting two, ordinary = or >1A,
any PIV, silicon rectifiers across the terminals on each meter. The two
diode arrows should point in opposite directions."
On 16/5/20 1:10 am, Artek Manuals wrote:
I am resurrecting a SB220 that had an apparent classic Grid/plate
short event. One of casualties appears to be the right hand meter
movement. This is the one for Grid Current and HV. I am pretty far
into it and the meter movement measures open , the internal shunt
resistor is blackened ( and open?)
Anyone got a surplus movement from a parted out unit? Nothing found on
evil-bay at the moment
Dave NR1DX
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