TEXT IS FROM DECEMBER 2008 QST PAGES 36, 37 AND 77 ‰ QST DE W1AW ƒ ‰ NOW 5 WPM ‰ USING A HYBRID COMBINER, THE THIRD ORDER INTERCEPT IP3 LEVEL IS ALSO EASILY FOUND. I WAS ABLE TO MEASURE THE PERFORMANCE PARAMETERS SHOWN IN TABLE 1. NO DOUBT THESE FIGURES COULD BE IMPROVED CONSIDERABLY WITH A MORE ƒ QST DE W1AW ‰ SOPHISTICATED FRONT END MIXER. CONSTRUCTION I USED ORDINARY PERFORATED ‰ FROM PAGE 77 ‰ RI KB8O 464 2 1 1,088 NLI KC3Q 220 2 1 980 ‰ END OF 5 WPM TEXT ‰ QST DE W1AW ƒ