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Re: Substitute parts for 12au6s on 575 curve tracer

 

The bigger deal is the doubled current draw. I reckon it -highly- unlikely that a 300mA draw might kill a secondary but I'd be checking things to be sure.

Bill @ PEARL, Inc.

Bill,
Anita said someone had put in a power resistor to compensate for the
reduction of the number 12V heaters. Voltage checks are/have will/been
done to confirm the correct heater voltage across the remaining 12AU6s.
Mark
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