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DAMAGED BY VIBRATION OR EXTERNAL ELECTRICAL SOURCES.  IT ALSO DISCONNECTED
THE AND COMMON JACKS FROM THE REST OF THE METER CIRCUITRY.  LIKE ALL
QUALITY MULTIMETERS, THE 260 HAD BUILT IN PROTECTION FROM OPERATOR ERRORS
LIKE FORGETTING TO CHANGE THE SCALE WHEN MEASURING VOLTS AFTER MEASURING
CURRENT.  THE INTERNAL FUSES AND VARISTORS OFFERED SOME PROTECTION, BUT
WERENT FOOLPROOF, SO IT WAS ALWAYS FOR THE BEST TO CHECK THE RANGE SETTING
BEFORE MEASURING OR TESTING ANYTHING.  THE ORIGINAL 260S WERE A BIT
ƒ  QST DE W1AW  ‰
DIFFICULT TO SERVICE.  ALL WIRING WAS DIRECT POINT TO POINT AND THE
INDIVIDUAL WIRES WERE CLOTH COVERED.  PRINTED CIRCUIT BOARDS HAD NOT BEEN
INVENTED YET, SO MOST RESISTORS AND CAPACITORS WERE MOUNTED ON A PHENOLIC
BOARD AND HAND WIRED TO THE VARIOUS POINTS WITHIN THE INSTRUMENT.  THE 260
WAS RATED AT 20,000 PER VOLT DC AND 1,000 OR 5,000 PER VOLT AC, DEPENDING
ON THE PRODUCTION SERIES.  THAT MEANT ANY VOLTAGE MEASUREMENT TAKEN IN A
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