Holy FCC Part 15 violation, Batman!
Sep. 4th, 2005 05:34 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
gizaSo... I'm up at my parents' place in Allentown for the Labor Day Weekend. While chatting with my father a few minutes ago, I was idly scanning the 70cm (420-450 Mhz) band on my ham radio. Suddenly, the scanning stopped and I heard music playing. Now, sending music over the ham radio bands is illegal, so that shouldn't be happening. I listened for a few seconds, and it suddenly dawned on my that my father's radio was softly playing the SAME song! I asked him to turn off the radio and when he did, the music stopped.
So we did some more experimenting, and discovered that different stations caused music to be played on different ham frequencies. Here are my observations:
95.1 Mhz -> 425.600 Mhz
98.1 Mhz -> 435.475 Mhz
100.7 Mhz -> 442.550 Mhz
What's really strange is that these frequencies aren't even harmonics. The multiplication factors of each frequency in the 70cm band are 4.47, 4.43, and 4.39, respectively. I've never heard of anything like this happening before.
Anyone ever heard of anything like this happening before? Anything I can do to fix the problem?
So we did some more experimenting, and discovered that different stations caused music to be played on different ham frequencies. Here are my observations:
95.1 Mhz -> 425.600 Mhz
98.1 Mhz -> 435.475 Mhz
100.7 Mhz -> 442.550 Mhz
What's really strange is that these frequencies aren't even harmonics. The multiplication factors of each frequency in the 70cm band are 4.47, 4.43, and 4.39, respectively. I've never heard of anything like this happening before.
Anyone ever heard of anything like this happening before? Anything I can do to fix the problem?