Freeview reception at CM17 0LP
List is for aerial group type: ■ wideband ■ group A ■ group B ■ group C/D ■ group E ■ group K
| ch | ↓name | signal strength | direction | transmitter | |
|---|---|---|---|---|---|
| C26 | analogue BBC One London | s-sw 201° | Crystal Palace | H | |
| C51 | west 260° | Hemel Hempstead | V | ||
| C58 | west 277° | Hertford | V | ||
| C33 | analogue BBC TWO England | s-sw 201° | Crystal Palace | H | |
| C44 | west 260° | Hemel Hempstead | V | ||
| C64 | west 277° | Hertford | V | ||
| C41 | analogue ITV1 London | west 260° | Hemel Hempstead | V | |
| C61 | west 277° | Hertford | V | ||
| C30 | analogue Channel 4 | s-sw 201° | Crystal Palace | H | |
| C47 | west 260° | Hemel Hempstead | V | ||
| C54 | west 277° | Hertford | V | ||
| C51 | multiplex SDN England (COM4) | northwest 323° | Sandy Heath | H | |
| C58 | e-ne 58° | Sudbury | H | ||
| C52 | multiplex Arqiva-A (COM5) | northwest 323° | Sandy Heath | H | |
| C60- | e-ne 58° | Sudbury | H | ||
| C48 | multiplex Arqiva-B (COM6) | northwest 323° | Sandy Heath | H | |
| C56 | e-ne 58° | Sudbury | H | ||
| C48+ | multiplex 1 England London | west 260° | Hemel Hempstead | V | |
| C55 | multiplex 2 England London | V | |||
| C32- | multiplex A England | s-sw 201° | Crystal Palace | H | |
| C60+ | west 260° | Hemel Hempstead | V | ||
| C28- | multiplex B | s-sw 201° | Crystal Palace | H | |
| C59- | west 260° | Hemel Hempstead | V | ||
| C34+ | multiplex C | s-sw 201° | Crystal Palace | H | |
| C62 | west 260° | Hemel Hempstead | V | ||
| C29- | multiplex D | s-sw 201° | Crystal Palace | H | |
| C65 | west 260° | Hemel Hempstead | V | ||
| C31 | Freeview HD (early multiplex BBCB) | s-sw 201° | Crystal Palace | H | |
| C27 | multiplex BBCA England Cambridge | northwest 323° | Sandy Heath | H | |
| C44 | multiplex BBCA England East | e-ne 58° | Sudbury | H | |
| C41 | multiplex D3+4 England Anglia (East micro region) | H | |||
| C47 | Freeview HD multiplex BBCB (PSB3) National | H | |||
| C32 | Freeview HD multiplex Arqiva-C (com7) | northwest 323° | Sandy Heath | H | |
| C34 | Freeview HD multiplex Arqiva-D (com8) | H |
List is for aerial group type: ■ wideband ■ group A ■ group B ■ group C/D ■ group E ■ group K
Distance to transmitters:
- Crystal Palace - 43.3km 26.9 miles
- Hemel Hempstead - 41.1km 25.6 miles
- Hertford - 17.4km 10.8 miles
- Sandy Heath - 47.5km 29.5 miles
- Sudbury - 49.4km 30.7 miles
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Show good and blocked paths from CM17 0LP for aerial height of ...10m20m (Angel of the North)25m30m40m56m (Hyde Park Flats, Sheffield)62m (Monument)90m (Royal Liver Building, Liverpool)107m (Meridian Quay Tower, Swansea)115m (Bridgewater Place, Leeds)127m (Glasgow Tower)143m (Guy's Hospital)158m (Blackpool Tower)170m (Spinnaker Tower, Portsmouth)180m (The Gherkin/BT Tower) 193m (Tower 42)235m (Canary Wharf)310m (The Shard)(default view)
Thursday, 25 September 2025
H
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Wednesday, 1 October 2025
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Monday, 13 October 2025
My aerial points toward the row ridge transmitter, some nights I have no reception at all even on main BBC and ITV channels. should it be pointing towards Findon?
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Keith's: mapK's Freeview map terrainK's terrain plot wavesK's frequency data K's Freeview Detailed Coverage
Tuesday, 14 October 2025
C
Chris.SE2:37 AM
Keith pedder:
Ah, interesting question, but initial response is no. Findon is only a Freeview Light transmitter and doesn't carry the commercial multiplexes SDN/COM4, ArqA/COM5 and ArqB/COM6.
For which TV channels are carried on which multiplex, see -
Channel listings for Industry Professionals | Freeview
You haven't said how long you've had the problem! There are a number of possibilities.
1) Is it a problem you have periodically and has started again recently - since last Friday perhaps?
2) Is it a problem that is happening continuously, more or less all day and all night or
3) Is it a problem that comes and goes on (nearly) most days?
If 1) it's current weather conditions, you MIGHT get more reliable reception from an alternative transmitter (more detail in a moment and it might mean a change of aerial)
If 2) Something that could be due to new/upgraded phone masts (you've got at least 11 near you!
If 3) Then an alternative transmitter may again be a solution.
Let's deal with 2) first as it's a short simple matter which you may suffer from and should be able to deal with. Have you had a postcard from Restore TV? - you should have but we know lots of cases where people haven't been sent one!
See https://restoretv.uk/post…ure/
If your current aerial is a wideband then you are more vulnerable to this issue, if it's a newer Group K then that will help reduce the potential issue, or if it's even an older Group A aerial which was all that was needed for Rowridge it might help reduce the problem BUT ....
If you haven't already got a 700MHz Filter (often called a 5G filter), get in touch with Restore TV and request the Free filter. If you have any Amp/splitter to feed several TVs/boxes etc , the filter should be fitted BEFORE the Amp. If you have an external Masthead Amp, tell Restore TV - they should send an engineer Free of Charge to fit a waterproof one on your mast.
If the latter is the case then they could well deal with 1) and 3) as their job is to ensure you have as reliable reception as possible.
Ok. 1) & 3). You have possible reception in your postcode from 3 transmitters, Rowridge, Findon and Whitehawk Hill and luckily you should have line-of-sight to all 3 assuming no direct local obstructions from tall buildings, trees etc.
There is a "however" - Findon, already mentioned BUT it should give the most reliable reception of those 3 PSB multiplexes.
Let's mention Rowridge next - is your aerial horizontal or vertical polarisation? (ie the rods or squashed Xs horizontal or vertical). This transmitter (one of very few) has both polarisations.
If Horizontal, then the reception of the PSBs is failry good, but the COMs are VERY variable to none for ArqA and the COMs are also lower power for horizontal. Ther's also a Local mutliplex but you aren't predicted to get it.
If Vertical, then the PSBs are better, and so are the COMs as they are transmitted at the same power as the PSBs but still can be variable reception. (No Local mux on vertical).
Now Whitehawk Hill. The COMs are very much better and all but the PSB3/HD multiplex are better than Rowridge but still may give you reliable reception.
Note, all comments about reception are based on "predicted reception", so not an absolute guarantee!
Finally aerial direction (also Group and polarisation). Vertical polarisation is needed for the alternatives to Rowridge and is best for Rowridge (although no Local mux)
Whitehawk Hill also has a Local mux which you are predicted to get.
If you have an old Group A aerial for Rowridge, then it will be best replaced with a Group K (and maybe old enough it may have deteriorated connections and coax anyway).
A Wideband will be OK for all transmitters (apart from the vulnerability of interference from Mobile masts) BUT a Group K is best and should be used in an aerial replacement situation and should be high gain apart from maybe Findon which "might" be ok with medium gain.
For your postcode, direction for Rowridge is compass bearing is 255 degrees (15 degrees S of due W).
Direction for Whitehawk Hill is 87 degrees, pretty well due E.
Direction for Findon is 8 degrees, that's 8 east of due N.
Hope that helps, if you have further queries, post back.
If you need an aerial installer, make sure they are recommended and knows your area (preferably CAI approved) and not a back street cowboy.
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Sunday, 19 October 2025
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