Total posts : 45366
A very interesting layout, BC Man. Thanks for posting all of those photos. I look forward to when I can post photos of my station.
With that long of a run of cable, have you checked to make sure the supply voltage at the transmitter is what it should be? I assume, though, that you get the proper “RF” voltage reading when you have it properly tuned.
I’m afraid that your range limitation may be due to your area’s ground, i.e., soil, conductivity. For FM-ers, the quality of the soil only affects “reflectability.” For AM-ers, it affects the range of the “ground wave,” which carries the signal during daylight hours.
Now, for a given ground conductivity, the range increases as the frequency goes down. But the bandwidth goes down, too, for a given antenna size. A lower frequency of operation may require adding pre-emphasis to the highs in the audio, especially for music. With that long of an audio run to your transmitter, you probably already have to do that some, because the cable will have more and more affect (attenuation) on the high frequency end of audio.
Bill in SE Texas