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Post by CAwasinNJ on Feb 23, 2018 7:17:31 GMT -6
David, your math has some problems. The 1160 x 2 = 2320 part is correct, but the -1000 part isn't. Harmonics are simple multiples with no additional math. One easy example is KNRS(AM) near the transmitter in NSL. 570 x 3 = 1710 so if you tune to 1710 in that area you'll get KNRS. You could theoretically also get it at 570 x 2 = 1140 but KSL(AM) will probably obliterate it. The problem you're having with 1490 on 590 and 1660 on 760 is probably some combination of front end overload and the intermediate frequency but I'm too tired to try to figure out the math right now. The fact that you say your radios that have dual and triple conversion don't show that problem supports that theory. Conversion is not filtering per se, it's simply moving one frequency to another.
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Post by David on Feb 23, 2018 14:24:25 GMT -6
Math has never been my strong suit, CA--that's why I never tried to become an electrical engineer. 🙄 I got lost in my electronics courses in school after figuring out Ohm's Law. Suffice to say I have problems with front end overload from KOGN on 590 kHz and other areas of the radio spectrum except with dual and triple conversion receivers. Call it one of the "hazards" of living a mile away from a 1 kw AM broadcast station. And FWIW, I also receive images of KSL-AM in the longwave band.
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