=  NOW 13 WPM  =  TEXT IS FROM DECEMBER 2020 QST PAGE 34  = 

USING THE COMMANDS CLOCKGEN.  ENABLE OUTPUTSTRUE ON TRANSMIT, AND CLOCKGEN.
ENABLE OUTPUTSFALSE ON RECEIVE.  THE SI5351 OUTPUT RESPONDS WITHIN A COUPLE
OF RF CYCLES, SO THIS PROVIDES A VERY CLEAN WAY TO SUPPRESS ANY SPURIOUS
SIGNALS AT THE RECEIVER.  THE 10 K PULL UP RESISTOR AND 0R1 UF BYPASS
CAPACITOR ARE SIMPLY ADDED TO THE COPPER SIDE OF THE PRINTED CIRCUIT BOARD
SEE THE GERBER FILES ON THE QST IN DEPTH PAGE.  I FOUND THE SLIGHT BLEED
THROUGH OF THE SYNTHESIZER OUTPUT WHEN ENABLED TO BE EXTREMELY USEFUL IN
<  QST DE W1AW  =
ZERO BEATING THE TRANSMITTER TO A TUNED SIGNAL.  THE LEAD IMAGE SHOWS MY
TUNA TIN S IN OPERATION WITH MY COLLINS 75S 3 RECEIVER.  THE SI5351
SYNTHESIZER PRODUCES A SQUARE WAVE THAT IS RICH IN HARMONICS, SO IT IS
ESSENTIAL TO PROVIDE ADEQUATE FILTERING OF THE OUTPUT WAVEFORM IN ORDER TO
MEET FCC EMISSION REQUIREMENTS.  OPERATIONAL RESULTS I FIRED AWAY SOME CQS,
DELIVERING 600 MW TO AN END FED ANTENNA THAT WAS UP 50 FEET.  I THEN
=  END OF 13 WPM TEXT  =  QST DE W1AW  <