[Amps] SB220 Meter blown

[Jim]

WRONG.

.6 or .7 or slightly more during an "event" volts is still enough to 
blow up the meter.


Thanks
73
Jim W7RY

On 5/15/2020 4:08 PM, Adrian wrote:
> 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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