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Re: [IRCA] Image Frequency Question
On 23-Feb-09, at 1:46 PM, Ty T wrote:
Hello,
While the topic of frequency imaging is being discussed, I have one
to ask. Here in Billings, MT I can pick-up our local 970, KBUL on
850 during the day. It comes in just like it was actually on 850.
At night, it is no longer present and KOA Denver usually comes in
like a local themselves. Any ideas why 970 images onto 850? The
other locals here are 730, 790, 910, 970 and 1240. The only other
imaging I have noticed locally is a faint image of 730 onto 1090.
Most likely a mixing (intermod) product with your local on 910.
2 x 910 - 970 = 850
2 x 910 - 730 = 1090, which gives you your other mixing product
Here in Calgary I get a few of these from our 50 kW locals on 660,
770, 910, 960, 1010, 1060, 1140:
2 x 660 - 770 = 550
2 x 960 - 1060 = 860
2 x 1140 - 1060 = 1220
are the worst
73,
Deane McIntyre VE6BPO
Calgary AB
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