‰  NOW 40 WPM  ‰  
45 YEARS WORKING IN AEROSPACE, MEDICAL, INDUSTRIAL, AND ELECTRO MECHANICAL
DESIGN.  HE ENJOYS DESIGNING AND BUILDING RECEIVERS AND TRANSCEIVERS.  JIM
OPERATES SSB, CW, AM, AND FM AND HAS BEEN ACTIVE IN SEVERAL AMATEUR RADIO
CLUBS.  HE HAS PREVIOUSLY PUBLISHED ARTICLES IN HAM RADIO AND QST MAGAZINE.
YOU CAN REACH JIM AT 3210 SHADYWAY DR, PITTSBURGH, PA 15227, JFORKIN
VERIZON.  NET, OR WA3TFS ARRL. NET.  NEW VIDEO  K1N THE NAVASSA ISLAND
DXPEDITION 2015 DVD REVIEWED BY STEVE FO

RECEIVER ON A KNOWN FREQUENCY SUCH AS A LOCAL WEATHER CHANNEL OR PUBLIC
SERVICE FREQUENCY IN THE VHF SPECTRUM, AND NOTICE THE DISPLAY SHOWING THE
RECEIVED SIGNAL.  SELECT THE PROPER DEMODULATION, USUALLY NBFM.  FREQUENCY
CALIBRATION SELECT CONFIGURE AND FIND A SELECTION IN THE MENU TO ADJUST
FREQUENCY CORRECTION PPM.  I HAVE FOUND THAT THESE DONGLES HAVE A LITTLE
BIT OF DRIFT WHEN FIRST TURNED ON, AND THEN BECOME VERY STABLE AFTER A FEW
MINUTES OF WARMUP.  SET THE COMPENSATION TO CENTER THE RECEIVER ON THE
SIGNAL AT THE INDICATED FREQUENCY.  TURNING ON THE IF DISPLAY MAKES IT EASY
TO SEE THE RESULT OF THE ADJUSTMENT.  THIS OFFSET COMPENSATES FOR
VARIATIONS IN FREQUENCY CONTROL IN THE DONGLE.  ONCE SET, THE FREQUENCY
SELECTED WILL CORRESPOND WITH THE ACTUAL RECEIVED SIGNAL.  EXIT THE
CONFIGURATION MENU.  THE SOFTWARE ALLOWS YOU TO ALSO SET THE FILTERING
WIDTH FOR EACH MODE, THE Q OF THE FILTER, NOISE CANCELLATION PARAMETERS,
SQUELCH IN SOME MODES, GAIN, AND SO ON.  IT IS POSSIBLE TO ADJUST THE
RECEIVER TO YOUR REQUIREMENTS AND ADJUST THE SCREEN DISPLAY TO YOUR LIKING.
TAKE THE TIME TO BECOME FAMILIAR WITH ALL THE POSSIBILITIES.  USING THE

PC BOARD LAYOUT I HAVE DESIGNED A PRINTED CIRCUIT BOARD THAT WOULD MAKE
CONSTRUCTION MUCH FASTER AND EASIER.  THE DETAILS ARE SHOWN ON THE QST IN
DEPTH WEB PAGE.  IF YOU WISH TO USE THE RECEIVER ONLY ON THE HF BANDS BELOW
30 MHZ, YOU CAN DELETE THE SWITCH, WHICH DISCONNECTS THE UPCONVERTER FROM
THE DONGLE AND REROUTS THE ANTENNA TO THE DONGLE AND SUPPLIES POWER TO THE
OSCILLATOR.  THE DONGLE REQUIRES NO EXTERNAL POWER OTHER THAN THAT SUPPLIED
THROUGH THE USB CONNECTION.  THE UPCONVERTER OSCILLATOR REQUIRES 5 V THAT
IS SUPPLIED BY AN ONBOARD 78L05 REGULATOR FED BY A 9 TO 12 V DC SOURCE.  A
SERIES DIODE ASSURES NO DAMAGE WILL OCCUR IF POLARITY IS REVERSED.  SETUP
AND OPERATION YOU MUST DOWNLOAD, INSTALL, AND CONFIGURE THE SOFTWARE BEFORE
USING THE USB DONGLE.  FOR BEST RESULTS, DO THIS BEFORE CONNECTING IT INTO
THE UPCONVERTER.  DOWNLOAD SDR FROM THE SDRSHARP WEB PAGE.  FOLLOW THE
INSTALLATION PROCEDURE DETAILED ON THE WEB PAGE.  THE SOFTWARE WORKS WITH
ANY MODERN VERSION OF WINDOWS AND CAN ALSO BE LOADED UNDER LINUX.  SEARCH
THE INTERNET FOR SDR SOFTWARE TO FIND SEVERAL ADDITIONS AND CHANGES
AVAILABLE FOR THE SOFTWARE TO ENHANCE PERFORMANCE OF YOUR SDR.  YOU WILL
ALSO FIND SEVERAL OTHER AVAILABLE SOFTWARE PACKAGES.  ONCE YOUVE INSTALLED
THE SOFTWARE ON YOUR COMPUTER, PLUG THE DONGLE INTO A SUITABLE USB PORT,
ACTIVATE THE SOFTWARE, AND YOU WILL SEE THE RECEIVER DISPLAY.  SET THE
‰  END OF 40 WPM TEXT  ‰  QST DE W1AW  ƒ