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| Tweet Topic Started: Tuesday, 6. October 2015, 09:51 (496 Views) | |
| Phil busta bus | Tuesday, 6. October 2015, 09:51 Post #1 |
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Hi. Here's a question I've been mulling over. Does or do the chances of causing TVI increase with atmospheric/skip conditions?. Personally I've worked all summer and not had any issues, yet over the weekend a mate neighbour knocked and told me his tv was suffering. Being responsible I sorted it immediately via a Highpass filter, but it appears I'm not alone. Chatted to someone the other day who's just started causing the same, having also had no serious problems. Granted it's getting colder and damper and electrical connections will suffer Very odd Thanks for reading.
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| Nubster | Tuesday, 6. October 2015, 10:11 Post #2 |
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26 Charlie Tango 050
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TBH Phil I cant see why not in a way , cos as you said electrical conectors can get wet IE; Sat dishes T.V antennas, I have never had any TVI probs where I live since I been here (20 year) but I have noticed that certain times of the year our freeview sometimes goes a bit pixley when it rains and also our Virgin T.V and Internet plays up too but saying that the Virgin cable stuff is underground and it does flood (not bad) a bit in my area if it rains very hard so the underground cables could be getting wet in my situation , but as you say I cant see why weather cant be a cause of TVI or interference |
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Life is too short, so ave a laugh now n then never know you might like it | |
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| Phil busta bus | Tuesday, 6. October 2015, 10:22 Post #3 |
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Thanks bud. See I'm also wondering If when conditions change and it becomes more difficult for an Antenna to disperse it's RF, a greater proportion remains in a more local area. My theory being similar to resistance in a pure electrical circuit. Fact is it has to go somewhere lol.
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| Nubster | Tuesday, 6. October 2015, 10:55 Post #4 |
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26 Charlie Tango 050
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Another thing Phil , since over the last 25/30 year as London has been developing (innercity) with taller buildings being built even that can cause problems with interference OK not CB TVI as such but it has caused interference in one way or another of other stuff, I can remember as Canary Wharf was being built when it was finished some parts of Enfield area lost or had reduced reception of some of there T.V channels because they found out that the big tall buildings where blocking a transmitter so they had to build a repeater to go around them so I was told , also Ive noticed that my CB reception/transmmision has be come less since the taller buildings have been built in London over the years ,and I know its not my imagination
Edited by Nubster, Tuesday, 6. October 2015, 10:57.
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Life is too short, so ave a laugh now n then never know you might like it | |
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| Phil busta bus | Tuesday, 6. October 2015, 11:51 Post #5 |
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Serious case for adapt and evolve then I guess bud. Problem is unlike most other radio or reception based hobbies, large investment in technology will never happen as we are considered but a few. It seems to me to be on the up again, as more and more people are becoming fed up with mobiles. Personally speaking I am as they don't offer a challenge to me. This game however does, and I've changed from a sofa tv addict to a shed bound radio lover. Biggest problem we face is laws and non complyant electrical gear. Perhaps it's now time to start making out hobby look good again 😆
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| Roy | Tuesday, 6. October 2015, 12:05 Post #6 |
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104 Charlie Tango 011
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Hi Phil, It could be a combination of little things such as certain TV satellites change orbit at this time of year, lower and denser cloud levels can weaken satelitte singals a tad..... and once you have any reduction of the satelitte signal that is when the stronger stray RF signal can effect a satelittle system that you would previously not have effected. And yes you are correct, there is also the fact that dampness can also play a part by getting into fittings and coax that are exposed to the elements, one simple example of this is the fact that people will often tell you that their SWR can move as much as one or two points during wet weather. |
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Roy 104DA101 & 104ET001 + 104CT011 Your Radio Friend in Corsica Island Website : My Webpage YouTube Channel : My Webpage
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| Phil busta bus | Tuesday, 6. October 2015, 12:16 Post #7 |
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Very true bud. Thanks for the reply. Now I've got to try and put that over lol, more than certainly not as well as you just did lol.😆 |
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| Deleted User | Tuesday, 6. October 2015, 12:31 Post #8 |
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Get a low pass filter in line phil,that will sort it......................... |
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| Phil busta bus | Thursday, 8. October 2015, 21:06 Post #9 |
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Yes that's a good idea sprouts another question in my mind though. Do low pass filters work both ways TX and RX?.
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| Deleted User | Thursday, 8. October 2015, 21:27 Post #10 |
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Only on tx,you wouldnt want to filter your rx well unless it was narrow on ssb........................... |
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| Phil busta bus | Thursday, 8. October 2015, 22:01 Post #11 |
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Lol was hoping that a low pass filter would also stop signals above 30mhz being bled over into my Rx lol dam 😆 |
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| Northern Crusader | Friday, 9. October 2015, 02:39 Post #12 |
26 Charlie Tango 1760
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That was tropospheric ducting and interference from broadcast stations in Europe. There was the mother of all lifts on over the weekend as we had a high pressure area sat over the UK with a large temperature drop on a night that created perfect conditions. On the repeater frequencies for GB3HS and YW I was hearing German and Swedish stations stronger than those repeaters were. On Friday night on GB3YC which is near Bridlington in East Yorkshire there was an amateur in Port Madoc in Wales talking through the repeater to a local ham. When you get a lift on like that on VHF and UHF there's absolutely nothing that can be done. It wasn't you and the installation of a filter appearing to cure it was purely coincidental in timing. When it is genuinely TVI being caused by your transmission it usually has more to do with the 20 year old manky water filled poorly screened TV coax on their TV antenna than your station. Coax typically has a lifespan outdoors of 5-8 years but there's lots of houses with coax 2 or 3 times older than that. Edited by Northern Crusader, Friday, 9. October 2015, 02:41.
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| 26CT1760 / M0GVZ | |
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| Phil busta bus | Friday, 9. October 2015, 15:54 Post #13 |
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Makes a lot of sense that. Mind lol I am partial to the odd whisky and it wasn't doing it when I'd only had a few. Mind that length of 213 road I've got strung out certainly isn't going to have number 12 or 4 at the end of it Thankyou
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