‰  NOW 20 WPM  ‰
CAPACITANCE DOES NOT NEED TO BE SYMMETRICAL BETWEEN THE TWO ENDS OF THE
INDUCTOR, AS IS COMMONLY SHOWN.  IT MAY ALL BE AT ONE END OR DIVIDED
UNEQUALLY.  WHEN DRIVEN FROM A 50 O SOURCE AND TERMINATED IN A 51 O
RESISTOR AND TWO MIXER LO PORTS, THE 90 PHASE DIFFERENCE IS NEARLY PERFECT
ACROSS A WIDE BAND AND THE AMPLITUDE DIFFERENCE BETWEEN THE TWO OUTPUTS IS
WITHIN 0R5 DB ACROSS A 10 BANDWIDTH MORE THAN ENOUGH BANDWIDTH TO COVER THE
USUAL SSB PORTION OF ANY AMATEUR BAND.  MIXERS A PAIR OF MINI CIRCUITS TUF
3 MIXERS SERVES AS THE I Q BALANCED MODULATORS.  THESE PROVIDE GOOD CARRIER
SUPPRESSION WITHOUT ADJUSTMENT, AND REASONABLE OUTPUT AT A MODEST
DISTORTION LEVEL.  IM PRODUCTS IN THE OPPOSITE SIDEBAND ARE MORE THAN 30 DB
‰  FROM PAGE 92  ‰
2 1 30 TN N4MM 29 1 1 29 VA WB9MII 7 2 1 28 IL KA0RID 11 2 1 22 KS AB0LJ 11
‰  END OF 20 WPM TEXT  ‰  QST DE W1AW  ƒ