Possible that the intermod was being created in your receiver front end!
73 de Mac, K2GKK/5 in OKC, OK
Sent from my iPhone
On Oct 27, 2021, at 14:12, Jim Brown <jim@audiosystemsgroup.com> wrote:
On 10/27/2021 6:29 AM, Gary Peterson wrote:
Every AM broadcast station is required to perform annual measurements, searching for
these types of problems. I contract to perform spectral measurements for most of the
AM stations within a 100 mile radius of my home. I have the necessary equipment and
travel to within approximately 1 kilometer of each transmitter site. I measure each
station’s occupied bandwidth, measure harmonics, up through and including the
6th and search for spurious signals, below, in and above the broadcast band.
Yes. But do those spectral measurements also include intermod products? I
started out in ham radio in jr high school with two 5kW non-DAs within a mile
of each other and about 1.5 miles from me, on 930 and 1470 kHz producing a
strong product at 3870 kHz. There may have been others products, but that one
gave me a lot of grief.
73, Jim K9YC
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