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 not one of the extended Freeview HD (COM7 and COM8) transmitters, it does not provide these high definition (HD) channels: .
If you want to watch these HD channels, either use Freesat HD, or move your TV aerial must point to one of the 30 Full Freeview HD transmitters. For more information see the want to know which transmitters will carry extra Freeview HD? 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)
Are you trying to watch these 0 Freeview HD channels?
The Hemel Hempstead (Hertfordshire, England) mast is not one of the extended Freeview HD (COM7 and COM8) transmitters, it does not provide these high definition (HD) channels: .
If you want to watch these HD channels, either use Freesat HD, or move your TV aerial must point to one of the 30 Full Freeview HD transmitters. For more information see the want to know which transmitters will carry extra Freeview HD? 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, 7 October 2021
Transmitter engineering
11:44 AM
11:44 AM
HEMEL HEMPSTEAD transmitter - DAB: Low power due to essential engineering from 7 Oct 10:10. . [BBC]
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Transmitter engineering
5:44 PM
5:44 PM
HEMEL HEMPSTEAD transmitter - DAB: Low power due to essential engineering from 7 Oct 10:10 until 7 Oct 13:12. . [BBC]
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Tuesday, 12 October 2021
Transmitter engineering
11:43 AM
11:43 AM
HEMEL HEMPSTEAD transmitter - DAB: Slightly reduced power due to essential engineering from 12 Oct 10:28. Low power due to essential engineering from 7 Oct 10:10 until 7 Oct 13:12. . [BBC]
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Transmitter engineering
2:43 PM
2:43 PM
HEMEL HEMPSTEAD transmitter - DAB: Slightly reduced power due to essential engineering from 12 Oct 10:28 until 12 Oct 14:58. . [BBC]
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Saturday, 22 October 2022
K
Keith12:33 PM
COM 4 on the Hemel Transmitter is glitching and unwatchable. All other COMs are OK
Is it on low power?
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K
Keith12:35 PM
Transmitter engineering: Is COM4 still low power. Blocking and glitchy at the moment.
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C
Chris.SE8:43 PM
Keith:
I can't find any faults listed for Hemel Hempstead nor is it currently listed for Planned Engineering.
As you haven't given a full postcode, I can't advise if your predicted reception for COM4 may be worse than the other multiplexes.
You may have been briefly affected by current weather conditions causing some "Tropospheric Ducting" which usually results in interference from other transmitters. Don't retune in any conditions where you have interference or no signal as this usually just clears you correct tuning or incorrectly tunes to other transmitters whose signals disappear as conditions change.
If you did retune, check you are still tuned to UHF C37 for the COM4/SDN multiplex at Hemel Hempstead.
If your problems continue post back with a full postcode and which of the channels on COM4 you are specifically trying to watch.
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Friday, 13 January 2023
Transmitter engineering
2:08 PM
2:08 PM
Hemel Hempstead transmitter - Hemel Hempstead transmitter: Possible effect on TV reception week commencing 09/01/2023 Screen may go black on some or all channels [DUK]
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Monday, 16 January 2023
Transmitter engineering
5:08 AM
5:08 AM
Hemel Hempstead transmitter - Hemel Hempstead transmitter: Possible effect on TV reception week commencing 16/01/2023 Screen may go black on some or all channels [DUK]
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Monday, 23 January 2023
Transmitter engineering
5:08 AM
5:08 AM
Hemel Hempstead transmitter - Hemel Hempstead transmitter: Possible effect on TV reception week commencing 23/01/2023 Screen may go black on some or all channels [DUK]
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