‰  NOW 35 WPM  ‰  TEXT IS FROM SEPTEMBER 2015 QST  PAGE 44 ‰

TRANSMIT AND RECEIVE ON FREQUENCY BE CERTAIN OF YOUR DISPLAYED FREQUENCY
WITH THIS EASY CALIBRATION TECHNIQUE.  BOB MCGRAW, K4TAX  WHILE
PARTICIPATING IN HF SSB AND CW NETS AND MAKING CONTACTS, I HAVE OBSERVED
THAT SOME STATIONS ARE NOT ON FREQUENCY.  UPON INQUIRING WITH THOSE
STATIONS OPERATORS, I HAVE FOUND THAT THE STATIONS RADIO DISPLAY SEEMS TO
INDICATE DIFFERENTLY FROM MINE.  WITH TODAYS PRECISION NOT TO BE CONFUSED
WITH ACCURACY ED. RADIO DISPLAYS, I OFTEN HEAR COMMENTS ON THE AIR SUCH AS,
YOU ARE 36 HZ LOW.  YET ANOTHER STATION RESPONDS, IM ON 7,250,000 HZ, SO
YOU MUST BE 36 HZ HIGH.  IN REALITY, AS COMPONENTS AGE, THE RADIO DISPLAY
MAY NO LONGER INDICATE THE ACTUAL TRANSMIT OR RECEIVE FREQUENCY.  THIS
ARTICLE DESCRIBES A METHOD FOR CHECKING YOUR RADIO FREQUENCY ACCURACY AS
COMPARED WITH THE DISPLAYED FREQUENCY.  YOU CAN ALSO USE THIS CALIBRATION
METHOD WITH THE ARRL FREQUENCY MEASUREMENT TEST.  I ENCOURAGE YOU TO BECOME
FAMILIAR WITH ANY RELATED PROCEDURE FOR YOUR SPECIFIC RADIO BEFORE TWEAKING
ANY INTERNAL ADJUSTMENTS.  FREQUENCY STANDARDS WE CAN COUNT ON THE NATIONAL
INSTITUE OF STANDARDS AND TECHNOLOGYS NIST WWV RADIO TRANSMISSIONS AS A
RELIABLE FREQUENCY STANDARD.  IN ONE METHOD, ZERO BEAT YOUR RECEIVER TO THE
WWV STATION USING THE VFO, WHILE LISTENING TO THE AUDIO TONE AS IT
DIMINISHES IN FREQUENCY TO ZERO.  WE MUST ASK OURSELVES, HOW CAN YOU HEAR
‰  END OF 35 WPM TEXT  ‰  QST DE W1AW  ƒ