=  NOW 15 WPM  =  TEXT IS FROM JANUARY 2022 QST  PAGE 31  =

FOR THE TRANSMITTER.  BECAUSE THE SI5351 CLOCK DEPENDS ON THE ONBOARD 25
MHZ CRYSTAL, WE WILL LIKELY HAVE SOME FREQUENCY ERROR IN OUR TRANSMITTED
SIGNAL DUE TO CRYSTAL TOLERANCE.  THIS ERROR MUST BE CORRECTED TO AVOID
TRANSMITTING OUTSIDE THE WSPR BAND.  NANOWSPR TRANSMITTER DESIGN  MY
MINIMALISTIC TRANSMITTER ACHIEVED SEVERAL KEY FEATURES.  IT WAS VERY LOW
COST, HAD NO ARDUINO PROGRAMMING, HAD MULTIBAND CAPABILITY, AND HAD THE
ABILITY TO ENTER CALL SIGNS, MAIDENHEAD GRID COORDINATES, AND POWER LEVELS
=  END OF 15 WPM TEXT  >