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My high gain aerial can't get all the Freeview channels I expected

My high gain aerial can't get all the Freeview channels I expected

My high gain aerial can't get all the Freeview channels I e
published on UK Free TV

You need a "wideband" aerial rather than a high gain one (see all about aerials). Also, if you use a signal booster in the setup, this can cause problems with digital signals.

Can I suggest that you try the following:

1. Check that all the connectors are OK, in particular that there are no stray wires and that both the outer shield and inner wire are connected;

2. If you are using any signal boosters, turn them off;

3. Check to see if you have anything like a VCR connected via a UHF fly lead - sometimes these can changed to use channels such as 68.

4. If you have a wideband aerial, if you can try raising it up an additional metre;

See also all about aerials.



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Comments
Thursday, 19 May 2011
M
mike green
1:05 PM
Bournemouth

i have an "old" 25 year old aerial,currently feeding two sets via a splitter.the splitter and aerial are both located in the loft and untill recently ,about a week,worked well.now both are experiencing break up of non bbc channells.

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Friday, 20 May 2011
B
Bill Wallace
sentiment_satisfiedBronze

9:58 AM
Towcester

Mike Green's post regarding the use of a splitter prompts this cautionary note. Unless the splitter has both output ports terminated with the characteristic impedance of the aerial and its downlead/s (usually 75ohms) either at the splitter or the far end of the distribution cable - eg, the TV - AT ALL TIMES, any cables connected to it will act at "stubs" and will create standing waves, possibly resulting in the equivalent of a shortcircuit (or open circuit) at the aerial at some frequencies.

Equally, the current changes from analogue to digital may result in some channels being beyond the frequency range of the aerial (check the Group for the latter). If the required channels are very disparate (eg, some down at channel 24 and 27 and others at 67 as I have) the best results will come from a wide band aerial (eg. a log periodic array). But because these rarely have an overall gain of more than 10dBi (much less than so-called "hi-gain" aerials), a masthead or similar amplifier (possibly with a passive hybrid distribution system) will probably be required.

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Bill Wallace's 43 posts GB flag
Bill's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
M
mike green
12:10 PM
Bournemouth

thaks for the replies ,but i had "perfect" repction untill recently ,on both sets.i have retuned both sets but still have poor recepion on non bbc channels,ie picture breaks into blocks.any firthe advice please

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mike green's 13 posts GB flag
mike's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
M
mike green
12:21 PM
Bournemouth

further research shows taht only some of the mutiplex are affected ,do i pop to b&q and buy a new aerial?

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mike green's 13 posts GB flag
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Briantist
sentiment_very_satisfiedOwner

1:09 PM

mike green: I would suggest you also consider replacing the cable - use satellite-grade coaxial cable. The cable often deteriorates before the actual aerial does.

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Briantist's 38,910 posts GB flag
M
mike green
1:22 PM
Bournemouth

thanks briantist difficult as the cabling for both sets runs thru the wall cavity

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mike green's 13 posts GB flag
mike's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
Saturday, 21 May 2011
M
mike green
7:44 AM
Bournemouth

strange this happen ,tv two is now ok[newest but farthest from aerial ,sony flat screen)tv one (panasonic crt)i have replaced the coax (6ft)hand made with new with moulded plugs seems ok.many thanks

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mike green's 13 posts GB flag
mike's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
Briantist
sentiment_very_satisfiedOwner

11:12 AM

mike green: I am pleased to hear that everything is OK.

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Briantist's 38,910 posts GB flag
Sunday, 22 May 2011
M
mike green
8:58 AM
Bournemouth

celebrations a bit premature,lost itv 1,c4 etc last night ,still not good ,ie blocking ,this morning!

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