‰  NOW 25 WPM  ‰  TEXT IS FROM DECEMBER 2005 QST  PAGES 32, 34 AND 97  ‰
PART OF A SINGLE COMMON ANODE RED GREEN LED, SEPARATE LEDS, OR YOU CAN USE
JUST ONE COLOR AS WE DID.  R1 AND R2 DETERMINE THE BRIGHTNESS OF THE GREEN
AND RED LEDS, RESPECTIVELY.  THE SCHEMATIC AND PARTS LIST ARE SHOWN IN
FIGURE 1.  CONSTRUCTION AND TESTING THE CONTROL BOARD THE CONTROL BOARD IS
SIMPLE TO BUILD AND EASY TO TEST.  WIRE ALL THE CONNECTIONS ON THE LEFT
SIDE OF THE SCHEMATIC, AND A COAX CABLE TO THE DRIVE OUTPUT.  THIS CABLE
SHOULD BE MADE USING RG 174 MINIATURE COAX WITH A BNC MALE CONNECTOR ON THE
END.  FOR NOW, CONNECT THE BNC CONNECTOR THROUGH A LOW POWER WATTMETER TO A
50 DUMMY LOAD.  THE DUMMY LOAD ONLY NEEDS TO HANDLE ABOUT 5 W.  TWO 100, 3
W RESISTORS IN PARALLEL OF THE SAME TYPE AS R6 CAN BE USED.  CHECK TO SEE
IF THE FULL POWER OF YOUR TRANSCEIVER REMAINS BELOW 2R5 W AT THE WATTMETER.
ATTACH A 1 K RESISTOR BETWEEN YOUR 12 V POWER SUPPLY AND THE PTT IN
‰  FROM PAGE 97  ‰
ARA KK5LE WA5NHP 295 2 5 1,006 LA Texas Instruments Houston ARC W5TI 210 2
‰  END OF 25 WPM TEXT  ‰  QST DE W1AW  ƒ