Added: 3 years ago
From: zappatx
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  • SECOND PART of comment  --- "Ah but look again. The operative word is ground "LEAD"

    You cannot run a copper grounding wire all the way

    up the mast to the transmitter, but nothing is stoping

    you from hosting rangemaster to a 60foot high steel billboard

    and grounding directly to the structure. As long as the

    total combined length of the antenna and grounding

    wire do not top 10 feet total.

  • I think i finnally found my answer // " Fcc regulations state that the combined length

    of Part 15 AM Antenna and ground lead cannot exceed

    120 inches. One might think that because the antenna

    already occupies 102 of those inches, the very short

    ground left behind will impair performance...." ___--- rest in the next comment

  • I am thinking about purchasing a range master, and i don't want to have an problems with FCC. So would you please reply to this and tell me if its possible to legally put that range master lets say on a roof of a building, like a church so i would get better range? " FCC 15.219 Operation in the band 510–1705 kHz. (b) The total length of the transmission line, antenna and ground lead (if used) shall not exceed 3 meters" Does it mean that its illegal to have it higher than 3 meters?

  • is it legal to have it that high ? like shown on video ??

  • These legal part 15 FCC AM transmitters are just toys. The range is about 50 feet on a good day if using the legal 9 feet wire antenna. If you add a longer antenna say for example on 1440 Khz (radio Luxembourg) that would be 325 feet of wire or 99 meters, sure the signal will travel a bit more but these units are designed so you can't go over the 9 foot and what you end up with is a horrible and distorted audio that is no good to anyone, Seriously what's the point?. - Just build a powerful one.

  • @JasonDolan I really don't care what you think but that all depends on your knowledge to enhance the audo -A-Synchronous bias (inovonics 222), the grounding, the soil condition (perhaps your area = sandy soil) and the tuning. I have 5 in one spot which soldly carries 7 miles radius & another (single) which can be detected 10 miles away.

    These are FCC legal part 15.219, not your taking house xmitter. I've even had a FCC visit which was positive. Distorted audio? Wrong. We're better than any AM.

  • The limit for license-free AM transmission in the US is 300 milliwatts RF ERP, isn't it?

  • Great videos. Thanx for the info. This will really help out when I set up my Tx.

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