Low Pass Filter, Paradynamics, PDC 1089, Advice?
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Phaze91460
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Phaze91460
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BobOstro61
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231
Bob, maybe I've missed it but what have you done for grounding stuff so far? Did you run a ground strap/wire from the base of the antenna to a good earth ground? If you don't give the harmonics a place to go other than the TX, a low pass filter will help some, but about all you can do is try it.
When I had my Antron at about 40' to the base at our old house, I ran a 12 gauge stranded wire from one of the u-bolts of the antenna to an 8' ground rod pounded in the ground. I also ran ground wires from the radio, amp, meter, low pass, and even my power supplies to the same earth ground. I didn't bleed on any of our land lines...even the older cordless styles. Most certainly didn't bleen on the TV.
RFI/TVI harmonics are seeking the path of least resistance to ground. I've always been of the opinion, "why not give a ground?" Many don't ground their antenna and rely soly on the masting. The problem with this philosophy (as I see it) is that most masting has some sort of coating on it (i.e. galvanized) that reduces conductivity. So I typically bypass that from the antenna itself, and then run one form the masting too. Being RF travels on the skin of the wires, it is more difficult to achieve a good ground. Heck, I even run one form the boom of the beams I've run over the years.
With the HF bands, some TVI is inevitable. However, there are plenty of things that can be done to reduce this. I see time and time again folks blaming antenna design for "bleeding." Fact is, harmonics are to blame. Yes, radiation patterns are different...but as I've mentioned before, I'm of the opinion that going after the source is a longer term solution IMO.
Just a couple of thoughts that might help a bit.
When I had my Antron at about 40' to the base at our old house, I ran a 12 gauge stranded wire from one of the u-bolts of the antenna to an 8' ground rod pounded in the ground. I also ran ground wires from the radio, amp, meter, low pass, and even my power supplies to the same earth ground. I didn't bleed on any of our land lines...even the older cordless styles. Most certainly didn't bleen on the TV.
RFI/TVI harmonics are seeking the path of least resistance to ground. I've always been of the opinion, "why not give a ground?" Many don't ground their antenna and rely soly on the masting. The problem with this philosophy (as I see it) is that most masting has some sort of coating on it (i.e. galvanized) that reduces conductivity. So I typically bypass that from the antenna itself, and then run one form the masting too. Being RF travels on the skin of the wires, it is more difficult to achieve a good ground. Heck, I even run one form the boom of the beams I've run over the years.
With the HF bands, some TVI is inevitable. However, there are plenty of things that can be done to reduce this. I see time and time again folks blaming antenna design for "bleeding." Fact is, harmonics are to blame. Yes, radiation patterns are different...but as I've mentioned before, I'm of the opinion that going after the source is a longer term solution IMO.
Just a couple of thoughts that might help a bit.
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BobOstro61
