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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Monday, 23 January 2012
HEMEL HEMPSTEAD transmitter - Freeview BBC Digital TV (Four, Cbeebies, Parliament, 3... Off Air from 01:23 on 17 Jan to 01:25 on 17 Jan BBC Digital TV (Four, Cbeebies, Parliament, 3... Off Air from 01:02 on 17 Jan to 01:07 on 17 Jan BBC Digital TV (Four, Cbeebies, Parliament, 3... Weak Signal [BBC]
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R
Ray McConnell12:19 PM
Hemel Hempstead Town digital switchover date | ukfree.tv - independent free digital TV advice shows a rather strange radiation pattern for hemel-hempstead after switchover but Hemel Hempstead digital switchover date | ukfree.tv - independent free digital TV advice shows a more useful pattern. Which one is correct ?
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Ray McConnell: Answer is both as there's two transmitters!
Hemel Hempstead Town is a low power relay located on the top of the former Kodak building:
mb21 - The Transmission Gallery
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The radiation pattern shown above for Hemel Hempstead has three nodes on it.
Yet the photographs on MB21 show it only has two sets of trough antennas for transmission:
mb21 - The Transmission Gallery
The pre-DSO digital panels (two sets of) can be seen lower down, and they too are pointing in the same direction of the ones used for analogue.
The two sets of antennas on nearly opposite faces explains the coverage map of the analogue signal which spills out much further in two opposite directions:
mb21 - Transmitter Information - Hemel Hempstead (Pimlico)
So is the clover-shaped radiation pattern (above) wrong or has there been subsequent work? Or have I missed something?
MB21 says they understand that there is no plan for the ones shown in the photos to be replaced for DSO.
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Wednesday, 25 January 2012
J
Jim F5:22 PM
Dave Lindsay: The "interim DTT panels" as shown on MB21 appear to me to be located on three sides of the mast - four on the left side, four on the right side, and four at the back (but these are somewhat hidden by the structure).
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Monday, 27 February 2012
HEMEL HEMPSTEAD transmitter - Over the next week Hemel Hempstead relay: TV (analogue) working normally, TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]
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HEMEL HEMPSTEAD transmitter - Over the next week Hemel Hempstead relay: TV (analogue) working normally, TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]
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Monday, 5 March 2012
HEMEL HEMPSTEAD transmitter - Freeview BBC Digital TV (Four, Cbeebies, Parliament, 3... Weak Signal from 15:51 today to 16:00 today [BBC]
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HEMEL HEMPSTEAD transmitter - Freeview BBC Digital TV (Four, Cbeebies, Parliament, 3... Weak Signal from 15:51 today to 16:00 today [BBC]
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Tuesday, 6 March 2012
HEMEL HEMPSTEAD transmitter - Freeview BBC Digital TV (Four, Cbeebies, Parliament, 3... Weak Signal from 15:51 yesterday to 16:00 yesterday [BBC]
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