‰  NOW 13 WPM  ‰  TEXT IS FROM MARCH 2009 QST  PAGES 41, 42 AND 82  ‰

DESCRIBED IN QST IS THE VALUE OF THE LOW PASS OUTPUT TRANSFORMER.  THIS WAS
CALCULATED USING THE FORMULAS IN QST AND THE 2009 ARRL HANDBOOK.  THE X3
AND X2 FREQUENCY MULTIPLIERS WERE BUILT ON A SCRAP OF UNETCHED COPPERCLAD
BOARD, USING UGLY CONSTRUCTION.  IF USING UGLY CONSTRUCTION AT VHF, IT IS
IMPORTANT TO SKETCH THE LAYOUT FIRST AND THINK ABOUT WHICH LEADS NEED TO BE
SHORT AND WHICH ONES CAN BE LONGER.  THE OUTPUT OF THE DOUBLER IS ABOUT 1
MW AT 50 MHZ, WITH ALL SPURS SUPPRESSED AT LEAST 45 DB BELOW THE DESIRED
ƒ  QST DE W1AW  ‰
OUTPUT.  THESE SPURS ARE FURTHER SUPPRESSED BY THE TUNED RF AMPLIFIER IN
THE MICROT2, AND BY THE NARROW BAND INTERSTAGE TUNING NETWORKS IN THE
LINEAR AMPLIFIER.  THE TUNED DOUBLER OUTPUT DRIVES THE ORIGINAL MICROT2
BUFFER AMPLIFIER CIRCUIT.  THE ONLY OTHER CHANGE TO THE MICROT2 IS RETUNING
‰  FROM PAGE 82  ‰
2,340 249 OZ1HQ 2,252,500 2,950 265 SK9HQ 2,244,200 3,165 245 LR5F 1,
838,440 2,031 205 NU1AW 1,646,888 3,798 164 W1AW/9 1,546,695 3,441 171
‰  END OF 13 WPM TEXT  ‰  QST DE W1AW  ƒ