‰  NOW 25 WPM  ‰  TEXT IS FROM NOVEMBER 2012 QST  PAGE 70‰

PROVERBIAL BIG DEAL IN 1820.  SO LETS REPEAT IT.  HEAD FOR THE KITCHEN AND
BORROW A STRONG REFRIGERATOR MAGNET CAPABLE OF HOLDING UP A CALENDAR.
YOULL ALSO NEED A SOURCE OF DC POWER SUCH AS A POWER SUPPLY 12 V IS FINE
AND A COIL OF SEVERAL MH WITH A DC RESISTANCE OF 10 TO 30.  YOU CAN EITHER
BUY OR SCROUNGE A SUITABLE INDUCTOR BUT THE COIL OF A 12 V RELAY WILL DO
FINE AND YOU MAY HAVE ONE IN YOUR JUNK BOX.  THE RELAY USED IN EXPERIMENTS
107 THROUGH 110 IS A GOOD CHOICE.  ALTERNATELY, A RADIOSHACK 275 001 WILL
WORK REMOVE THE PLASTIC CASE TO SEE THE COIL.  WORKING ON A NONFERROUS
TABLE PLASTIC OR WOOD, SUSPEND THE MAGNET A FEW INCHES ABOVE THE TABLE
USING THREAD OR DENTAL FLOSS.  MARK ONE FACE WITH PENCIL OR TAPE.  CONNECT
THE INDUCTOR TO THE 12 V SUPPLY THROUGH A VOLTMETER CONFIGURED TO MEASURE
CURRENT START WITH THE SCALE FOR MEASURING SEVERAL AMPS AND USE A MORE
SENSITIVE SCALE AFTER CONFIRMING THE CURRENT IS LOW ENOUGH NOT TO OVERLOAD
‰  END OF 25 WPM TEXT  ‰  QST DE W1AW  ƒ