‰  NOW 30 WPM  ‰
MA, AND HAS VIRTUALLY NO START UP DRIFT ABOUT 2 HZ AT 7 MHZ.  IT MAKES A
LOVELY KEYED CW GENERATOR TOO.  THE THREE RESISTOR ATTENUATOR BETWEEN THE
OUTPUT OF THE VXO AND INPUT OF THE BUFFER AMPLIFIER IS A CONVENIENT PLACE
TO INSERT A FREQUENCY MULTIPLIER OR EXTERNALLY GENERATED VFO.  JUST LEAVE
OFF THE TOP RESISTOR TO BREAK THE PATH.  NOTE THAT THE CRYSTAL AND VARIABLE
CAPACITOR ARE MOUNTED OFF THE PC BOARD.  FREQUENCY STABILITY IS DETERMINED
BY THE TEMPERATURE OF THE CRYSTAL.  I LIKE TO SLIP A FOAM PACKING BEAD OVER
THE CRYSTAL AND SUPPORT IT BY ITS LEADS BETWEEN THE PC BOARD AND VXO
CAPACITOR.  I USED A FRONT PANEL MOUNTED CRYSTAL SOCKET IN ONE PROTOTYPE
VERSION OF THIS EXCITER.  IT LOOKS VERY CLASSY, BUT NOISE PICKED UP BY THE
CRYSTAL BODY GETS INTO THE OSCILLATOR, AND THE SIGNAL RADIATED BY THE
CRYSTAL SOUNDS LIKE ONE WITH POOR CARRIER SUPPRESSION.  IF YOU USE A
CRYSTAL SOCKET, PUT IT INSIDE THE CASE OR BEHIND A SHIELD DOOR AS IN THE
OLD E. F. JOHNSON AND HEATHKIT TRANSMITTERS.  BUFFER THE BUFFER AMPLIFIER
‰  FROM PAGE 92  ‰
MI KC7KML 5 2 1 60 AZ WD4NIT 3 2 1 56 GA AA6EE 14 2 1 56 SDG W4SUL 28 2 1
56 NFL N1KN 27 2 1 54 CT KO6YG 4 1 1 54 SCV K4GHS 40 1 1 53 NC KB5DRJ 24 2
‰  END OF 30 WPM TEXT  ‰  QST DE W1AW  ƒ