‰  NOW 20 WPM  ‰  TEXT IS FROM MAY 2019 QST  PAGE 58‰

USING THE POINTED TIP OF MY SOLDERING IRON, I APPLIED MINIMAL PRESSURE AND
QUICKLY HEATED EACH PIN TO MELT THE SOLDER ON THE PC BOARD.  FINALLY, I
PLACED A PIECE OF DESOLDERING BRAID OVER EACH SET OF FOUR PINS AND ALLOWED
ANY EXCESS SOLDER TO BE TAKEN UP.  THE THREE DIGIT DISPLAY IS ACTUALLY A 0
100 V DIGITAL VOLTMETER.  THE SECOND, SOMEWHAT DIFFICULT STEP WAS MODIFYING
THE VOLTMETER MODULE TO BYPASS THE INPUT SCALING RESISTORS AND TO ALLOW IT
TO READ THE VERY LOW VOLTAGE OUTPUT OF THE LM358 IC.  THE MODIFICATION
INVOLVES SOLDERING A JUMPER WIRE TO THE BACK OF THE DISPLAY, FOLLOWING THE
WELL ILLUSTRATED INSTRUCTIONS.  THE JUMPER IS CUT 1/2 INCH FROM A SUPPLIED
PIECE OF INSULATED WIRE, STRIPPING 1/16 INCH INSULATION FROM EACH END.  I
FOUND IT IMPOSSIBLE TO STRIP THE INSULATION AND JUST BURNED IT OFF.  ONE
‰  END OF 20 WPM TEXT  ‰  QST DE W1AW  ƒ