‰  NOW 20 WPM  ‰
CONNECTION.  CONNECT A HIGH IMPEDANCE VOLTMETER BETWEEN GROUND AND THE PTT
IN CONNECTION.  A VERY SMALL AMOUNT OF RF FROM THE TRANSCEIVER SHOULD MAKE
THE VOLTAGE AT PTT IN DROP FROM 12 V TO NEARLY ZERO.  THIS TEST VERIFIES
THE OPERATION OF THE VOX CIRCUITRY.  REMOVE THE 1 K RESISTOR FROM THE PTT
IN AND TOUCH IT TO PIN 1 OF J2.  POWER TO THE RED LED SHOULD GO OFF AND
POWER TO THE GREEN LED SHOULD GO ON.  THE HI/LO POWER SWITCH MUST BE IN THE
HIGH POWER POSITION FOR THIS TEST TO WORK.  PIC SWR BOARDS THE PIC SWR
REQUIRES TWO PRINTED CIRCUIT BOARDS.  THE MAIN PIC SWR BOARD HAS ALL THE
CONTROL AND DISPLAY CIRCUITRY.  THE PICK UP UNIT HAS THE RF SENSING
CIRCUIT.  BUILD THE MAIN PIC SWR BOARD EXACTLY AS DESCRIBED IN THE ORIGINAL
‰  FROM PAGE 97  ‰
7 1,000 STX Arkansas Valley ARC N0QKE 123 2 12 996 CO Henry Co ARC N9WB 146
‰  END OF 20 WPM TEXT  ‰  QST DE W1AW  ƒ