TVI Filter
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Gixxer
TVI Filter
Anyone one got an opinion on a TVI filter that actually works ? Tryed out a Para Dynamics Low Pass Filter (PDC1089) and it was crap. Didnt work at all.
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BobOstro61
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231
Is everything inline grounded? If not, that might be part of the reason you are still transmitting harmonics. Has the mod limiter been clipped in your radio? Expecting a low pass filter alone to remove 100% of the harmonics isn't reasonable IMO. And let's face it, no matter if everything is 100% right you'll still have some folks (neighbors) who are running cheaply shielded (or non-shielded) stuff that you'll bleed over on.
First things first though, I typically ground everything to a 8' ground rod with at least #10 stranded wire. I also run the best coax I can afford with the maximum shielding. Any amplifiers will simply amplify whatever harmonics is being transmitted by the radio. The low pass filter should be the last thing inline before the antenna as well.
There is no "Silver Bullet" for RFI problems that I'm aware of either. I'm no expert, but did alot of research many years ago on how to clean up my station. What I found out is that on the HF bands it's typically a combination of things that will help clean things up. Antenna height (more to do with angle of radiation), grounding everything, low pass filter, coax, radio modulation etc. The harmonics are seeking the path of least resistance to ground...so why not give it to them?
Just my $.02
First things first though, I typically ground everything to a 8' ground rod with at least #10 stranded wire. I also run the best coax I can afford with the maximum shielding. Any amplifiers will simply amplify whatever harmonics is being transmitted by the radio. The low pass filter should be the last thing inline before the antenna as well.
There is no "Silver Bullet" for RFI problems that I'm aware of either. I'm no expert, but did alot of research many years ago on how to clean up my station. What I found out is that on the HF bands it's typically a combination of things that will help clean things up. Antenna height (more to do with angle of radiation), grounding everything, low pass filter, coax, radio modulation etc. The harmonics are seeking the path of least resistance to ground...so why not give it to them?
Just my $.02
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BobOstro61
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231
Bob, I typically run mine in series with quick disconnects and a bit of extra wire on each to zip tie it to the coax. Keeps it cleaner and easy to remove if needed. Then you only need to run a single wire to the rod. That's how I've always done it anyway.
Like I said though, there is only so much you can do. If you are bleeding on your own stuff, chances are you are bleeding on the neighbors. If you can show the neighbors you don't bleed on your own stuff it helps (sometimes anyway).
Like I said though, there is only so much you can do. If you are bleeding on your own stuff, chances are you are bleeding on the neighbors. If you can show the neighbors you don't bleed on your own stuff it helps (sometimes anyway).
