‰  NOW 20 WPM  ‰
TURNED COMPLETELY OFF DURING RECEIVE, I ELECTED TO USE CLASS A EMITTER
FOLLOWERS TO DRIVE THE MIXER IF PORTS.  I COULD ALSO HAVE CONNECTED THE
FEEDBACK RESISTOR TO THE EMITTER RATHER THAN THE BASE OF EACH FOLLOWER.  A
CIRCUIT SIMULATOR SHOWS A TINY BIT LESS DISTORTION BUT ALSO SOME POTENTIAL
HIGH FREQUENCY INSTABILITY WITH THAT CONNECTION.  I CHOSE THE PROVEN,
CONSERVATIVE APPROACH, AND DROPPED THE DISTORTION STILL FURTHER BY BURNING
A LITTLE MORE CURRENT IN EACH OF THE TRANSISTORS.  ADJUSTING THE SSB
EXCITER THERE ARE ONLY THREE ADJUSTMENTS ON THE SSB GENERATOR PC BOARD RF
AMPLIFIER TUNING, AMPLITUDE TRIM AND PHASE TRIM.  EACH ADJUSTMENT MAY BE
SET ONCE AND THEN LEFT ALONE.  I ADJUST SSB EXCITERS BY EAR USING A
‰  FROM PAGE 92  ‰
KI4JQB 16 2 3 152 VA 3D AF4NP 1427 2 12 2,904 AL K6VBC 440 2 8 1,404 SB
‰  END OF 20 WPM TEXT  ‰  QST DE W1AW  ƒ