Full Freeview on the Hemel Hempstead (Hertfordshire, England) transmitter
 | Google map |  | Bing map |  | Google Earth |  | 51.729,-0.426 or 51°43'43"N 0°25'34"W |  | HP3 8SA |
The symbol shows the location of the Hemel Hempstead (Hertfordshire, England) transmitter which serves 74,000 homes. The bright green areas shown where the signal from this transmitter is strong, dark green areas are poorer signals. Those parts shown in yellow may have interference on the same frequency from other masts.
This transmitter has no current reported problems
The BBC and Digital UK report there are no faults or engineering work on the Hemel Hempstead (Hertfordshire, England) transmitter._______
Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)
The Hemel Hempstead (Hertfordshire, England) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: .
If you want to watch these channels, your aerial must point to one of the 80 Full service Freeview transmitters. For more information see the will there ever be more services on the Freeview Light transmitters? page.
Which Freeview channels does the Hemel Hempstead transmitter broadcast?
If you have any kind of Freeview fault, follow this Freeview reset procedure first.Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)
The Hemel Hempstead (Hertfordshire, England) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: .
If you want to watch these channels, your aerial must point to one of the 80 Full service Freeview transmitters. For more information see the will there ever be more services on the Freeview Light transmitters? page.
Which BBC and ITV regional news can I watch from the Hemel Hempstead transmitter?
BBC London 4.9m homes 18.4%
from London W1A 1AA, 30km southeast (138°)
to BBC London region - 55 masts.
ITV London News 4.9m homes 18.4%
from London WC1X 8XZ, 31km southeast (135°)
to ITV London region - 55 masts.
How will the Hemel Hempstead (Hertfordshire, England) transmission frequencies change over time?
| 1984-97 | 1997-98 | 1998-2012 | 2012-13 | 18 Apr 2018 | |||||
| B E T | B E T | B E T | E T | K T | |||||
| C29 | ArqB | ||||||||
| C31 | ArqA | ||||||||
| C34 | _local | ||||||||
| C37 | SDN | ||||||||
| C40 | BBCA | ||||||||
| C41 | ITVwaves | ITVwaves | ITVwaves | D3+4 | |||||
| C42 | _local | ||||||||
| C43 | D3+4 | ||||||||
| C44 | BBC2waves | BBC2waves | BBC2waves | BBCA | |||||
| C46 | BBCB | ||||||||
| C47 | C4waves | C4waves | C4waves | BBCB | |||||
| C50tv_off | SDN | ||||||||
| C51tv_off | BBC1waves | BBC1waves | BBC1waves | ||||||
| C55tv_off | ArqB | ||||||||
| C59tv_off | ArqA |
tv_off Being removed from Freeview (for 5G use) after November 2020 / June 2022 - more
Table shows multiplexes names see this article;
green background for transmission frequencies
Notes: + and - denote 166kHz offset; aerial group are shown as A B C/D E K W T
waves denotes analogue; digital switchover was 4 Apr 12 and 18 Apr 12.
How do the old analogue and currrent digital signal levels compare?
| Analogue 1-4 | 10kW | |
| SDN, ARQA, ARQB, BBCA, D3+4, BBCB | (-7dB) 2kW | |
| Mux 1*, Mux 2*, Mux A*, Mux B* | (-14dB) 400W | |
| Mux C*, Mux D* | (-17dB) 200W |
Local transmitter maps
Hemel Hempstead Freeview Hemel Hempstead DAB Crystal Palace TV region BBC London LondonWhich companies have run the Channel 3 services in the Crystal Palace transmitter area
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Thursday, 15 September 2011
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claire8:02 AM
Bushey
I have no new aerial yet but had BBC1,2,3 nd news channel on digital. Have now lost all digital channels. Have tried reset. Have Panasonic TX-L26X20B TV.
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claire's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage
Keith Seddon: Yes, you must. The Freeview box will think that the BBC channels are on two frequencies and put all the "new" ones in the 800s. If you want BBC One at position 1, do a "first time install".
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claire: You don't need a new aerial, but you will need to retune to get the BBC channels back. Please do My Freeview box has no EPG, is blank on FIVE, ITV3, ITV4, ITV2+1, has no sound or the channel line up is wrong | ukfree.tv - independent free digital TV advice to your set.
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B
Bryan11:39 AM
Northwood
HA6 3NF
I receive my signal from Hemel Hempstead and have an in loft arial. Up to today have had an average digital reception on all BBC channels but have now lost all digital signal. Still get the analogue okay?
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Bryan's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
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Mike Dimmick11:44 AM
Claire: Before Wednesday morning, Multiplex 1 was within the old analogue aerial group, Group B. It has moved up into Group C/D. You will need a wideband or Group E aerial to get it back, and you will need one for all services after switchover.
After switchover the PSB multiplexes will be in Group B, as will the SDN multiplex, but you won't get a full range of channels without a change of aerial.
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Mike Dimmick11:45 AM
Bryan: See my advice to Claire, you probably still have a Group B aerial.
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Mike Dimmick12:14 PM
Keith Seddon: It's necessary to make the box forget about the previous location of those channels. Many boxes don't have a 'delete' function and they won't store channels they think they already know about. A full retune is the easiest way to handle it.
The DVB specs have always allowed for the multiplexes to carry an additional Network Information Table with a flag saying 'next version', to warn equipment in advance of a retune. That table can tell the equipment where a multiplex is going to. I believe this was transmitted on all transmitters in the London region, because my Humax PVR-9200T told me about a retune on Wednesday morning (I use the Crystal Palace transmitter). The testing for the 'digital tick' logo hasn't always required that the box implements it.
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A G Halden1:19 PM
No digital signal on channels 1 2 80 all this week
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Sylvia1:45 PM
Watford
My aerial is on the roof and the TV is a PanasonicTX-32LXD85
On your advice I went back to' Shipping Condition' and now all is OK
Very many thanks from WD19 4PE
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Sylvia's: mapS's Freeview map terrainS's terrain plot wavesS's frequency data S's Freeview Detailed Coverage
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Mike Dimmick7:37 PM
A G Halden: You need to retune your box, these channels have moved from C48 to C56. You should do a full reset, also called full retune, default setting, first-time installation, virgin mode, or reinstall all channels.
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