TVI filter???????

[Visegrip]

I'm having a Lil trouble with bleed over on tvs
I got my antenna up as high as I can go, and my swr is as low as I can get them ( 1.2)
I have everything grounded

Now my question: I just purchased a Para Dynamics TVI low pass filter
This thing just hooks in line on the antenna coax?
Is there any tips or secrets for these things? Or is it just hook and go?
Sorry If these questions sound dumb. I'm new to the base setup

[Sheriff Bart]

it's just plug and play Visegrip.

73's

[djrebel236]

no secret, between the antenna and radio.



the antenna plugs in on the "IN", a jumper from the "OUT" to the radio, thats how i got mine hooked up and have no problems at all...Dj

[Century21]

I think IN means power in and OUT means out to antenna..... At least my oak bay technologies filter sez that for me on to limit confusion.

[Circuit Breaker]

Just keep in mind that the low pass filter will only solve the problem IF the interference is the result of harmonics of your transmissions being picked up by the TV. If the neighbor has cable then more than likely the low pass filter will not solve the problem, although it won't hurt either. It may require you to put chokes on the power lead to the TV since RF can also get in that way as well.

[doctor]

Get a bencher filter, it is expensive but should clear up your problem, also put some ferrite beads<rat shack sells> on your coax near the antenna connector..

DOCTOR

[Century21]

The ferrite radio shack sells, if they have any in stock, and your not talked into buying a cell phone, satelite, and a radio shack credit card. And they are in view, because at the local shack, the kids running it dont know nothing. They are small one normally. Palomar engineering, or maybe some of the guys on this site sell some better and bigger.
Not all ferrite is the same.
Make as many wraps as you can, as close to the device as possible. Power line, cable line. It all help..

[DX47]

The chokes that the shack sells are the wrong mix to block HF, at least they used to be. The ones that snap apart are what I am referring to.

[Visegrip]

Sorry it took so long to reply

Thanks for the help guys

[rev ike]

LOTS OF LUCK i use a filter now i used to come through my computer, som far so good now ive still got to find some ferrite beads i got one from some where gotta get more

[Sheriff Bart]

LOTS OF LUCK i use a filter now i used to come through my computer, som far so good now ive still got to find some ferrite beads i got one from some where gotta get more

...you have tube radios as well as transistor radios. Were you experiencing TVI with your tube sets ? Is your antenna causing your problem (e.g. A-99, Imax 2000)...a certain type of linear ???


73's

[rev ike]

sheriff Bart i was on a solid state at the time it occured i think my new lpf has helped tremendously but i want to do everything possible to keep it to a minimum

[209 first class]

i had a tvi filter years back, didnt fix the problem. just to be sure about where to put it, it goes last in line before the antenna.(not sure if your using an amp or not,either way its last in line). i used to live in an apt, and i could use more watts if i kept the modj low with a higher dead key, rather than alot of audio with a low dead key. its the splatter/harmonics/over 100% modj that make that wonderfull distorted/crunchy sounds that are coming thru the tv ect i will guess. 209

[Sheriff Bart]

Visegrip, you have tube radios too. Are you getting TVI when using them or when you use solid state ? Another thing, I didn't ask what type antenna you are using but if it's a coil type then get the feedline as high as possible even if you have to get it up 70>80 feet.

73's

[Century21]

Why do you have to put it last in line? whats the technical reason for it. I never understood that. If it eliminates bad harmonics or what ever, the radio is what produces them. Unless the amp is so far out wack.
So why not amplify a clean signal, instead of making a dirty one twice as bad and then trying to clean it up.
just wondering.

[DX47]

Best way to go is to put it right behind the rig, and if you don't have a clean amp, put another there as well.

[209 first class]

good point ! i never looked at it that way. maybe he can do a test and tell us which way works better. i think it bleeds/feeds the hamonics to ground, if its before the amp, they would enter thru the ground anyways. maybe a ground strap from the chassis of the filter to station ground would help further? 209

[209 first class]

good point ! i never looked at it that way. maybe he can do a test and tell us which way works better. i think it bleeds/feeds the hamonics to ground, if its before the amp, they would enter thru the ground anyways. maybe a ground strap from the chassis of the filter to station ground would help further? 209

[Century21]

This one always bothered me as well.
If RF from a CB radio only goes to a 50 ohm load... Why go ground happy. Your only causing ground loops. Now i understand the equipment, and antenna needs a good ground. And it is supposed to be under 9 feet if possible. I just never under stood that.......
But i do understand, if your having bad rf problems, you may have a bigger problem somewhere else, cheap coax, bad connector.
I used to do connectors wrong. Just peel the braid back over the PVC and screw the connector back over it.... I finally made one right, soldering it properly. It actually help my RF problem on my computer speakers that sit right on top of my radio, helped the tv in the house, and best of all, it reduce my reflect by 1 watt...
I have 1 bus bar, with a 6 foot aluminum cable going to 3 ground round outside the shack and then 3 more just for the tower. Everthing in the shack has 4 foot or less long staps going to the ground bar.
But i would appreciate it if anyone knows why, when there is rf problems does everyone run to the grounds.... There has to be something there. I have just took a wire, hooked it up to the radio and threw it behind the desk on the floor and had that work before. Maybe it just redirects the RF????

[BtyMONSTER]

i think a lot of times people just dont ground properly and they keep grounding this piece and that piece till they accidentally do one ground right and it solves their problem . water pipes are among the worst........maybe second only to no ground at all . bad coax/connectors is a very common and overlooked problem . even new ones can be bad . i prefer coax with a foil shield . Davis bury-flex is hard to beat @ 10-11 meters for the price .

http://www.iceradioproducts.com/32.htm
http://www.iceradioproducts.com/31.html
http://www.amphenolrf.com/pro ... ns/274.pdf