‰  NOW 30 WPM  ‰   TEXT IS FROM JANUARY 2014 QST  PAGE 46‰

GREEN BOARD IS CONNECTED BY WIRES TO THE FRONT PANEL LCD DISPLAY BOARD
RIGHT SIDE, AND THE BUFFER AMPLIFIER RED BOARD IS ON THE UPPER LEFT.  YOU
CAN USE ANY LOW CURRENT 12 V DC SUPPLY.  THE ENTIRE VFO DRAWS ABOUT 90 MA.
MY POWER SUPPLY IS SEEN ALONG THE BOTTOM OF THE PHOTO SEE THE QST IN DEPTH
WEB PAGE FOR MORE DETAILS.  BUILDING THE DIRECT DIGITAL SYNTHESIZER FOR THE
DDS CIRCUIT I CHOSE THE N3ZI DDS 2 DELUXE KIT, WHICH FEATURES THE STANDARD
LCD DISPLAY AND HAS THE SURFACE MOUNT CHIP COMPONENTS ALREADY INSTALLED.
YOU MUST FIRST PURCHASE AND BUILD THE SYNTHESIZER AND GET IT WORKING
PROPERLY BEFORE PROCEEDING.  WHEN BUILDING THE SYNTHESIZER CONNECT THE
ROTARY ENCODER AND UP/DOWN SWITCHES TO THE DDS CIRCUIT BOARD WITH WIRES SO
THAT THEY CAN BE MOUNTED ON THE FRONT PANEL SEE FIGURE 3.  WIRED
CONNECTIONS GIVE YOU MORE FREEDOM WHEN MOUNTING THE CIRCUIT BOARD AND
RELATED COMPONENTS.  SYNTHESIZER OUTPUT LEVEL CRYSTAL CONTROLLED
TRANSMITTERS FROM THE 50S AND 60S REQUIRE SEVERAL VOLTS PEAK TO PEAK P P OF
RF TO PROPERLY DRIVE THEM FROM THEIR VFO INPUTS.  MY EICO 720 MANUAL
RECOMMENDS 10 20 V AT THE VFO INPUT.  THE SYNTHESIZER OUTPUT, HOWEVER,
‰  END OF 30 WPM TEXT  ‰  QST DE W1AW  ƒ