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Full Freeview on the Hemel Hempstead (Hertfordshire, England) transmitter

first published this on - UK Free TV
sa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps51.729,-0.426 or 51°43'43"N 0°25'34"Wsa_postcodeHP3 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.

Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name
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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.

MuxH/VFrequencyHeightModeWatts
PSB1
BBCA
 V max
C40 (626.0MHz)214mDTG-2,000W
Channel icons
1 BBC One (SD) London, 2 BBC Two England, 9 BBC Four, 23 BBC Three, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, plus 16 others

PSB2
D3+4
 V max
C43 (650.0MHz)214mDTG-2,000W
Channel icons
3 ITV 1 (SD) (London), 4 Channel 4 (SD) London ads, 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 London ads, 18 More4, 26 ITV4, 28 ITVBe, 30 E4 +1, 35 ITV1 +1 (London),

PSB3
BBCB
 V max
C46 (674.0MHz)214mDTG-2,000W
Channel icons
46 5SELECT, 101 BBC One HD London, 102 BBC Two HD England, 103 ITV 1 HD (ITV London), 104 Channel 4 HD London ads, 105 Channel 5 HD, 106 BBC Four HD, 107 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

COM4
SDN
 V max
C37 (602.0MHz)214mDTG-82,000W
Channel icons
20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 38 Channel 5 +1, 41 Legend, 42 GREAT! action, 57 Dave ja vu, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 TRUE CRIME, 68 TRUE CRIME XTRA, 78 TCC, 81 Blaze +1, 83 Together TV, 89 ITV4 +1, 91 WildEarth, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, 267 Al Jazeera English, plus 30 others

COM5
ArqA
 V max
C31 (554.0MHz)230mDTG-82,000W
Channel icons
11 Sky Mix, 17 Really, 19 Dave, 31 E4 Extra, 36 Sky Arts, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 60 Drama +1, 65 That's TV 2, 70 Quest +1, 74 Yesterday +1, 75 That's 90s, 233 Sky News, plus 11 others

COM6
ArqB
 V max
C29 (538.0MHz)230mDTG-82,000W
Channel icons
12 Quest, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 52 GREAT! romance, 56 That's TV (UK), 61 GREAT! movies extra, 63 GREAT! romance mix, 71 That’s 60s, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 235 Al Jazeera Eng, plus 18 others

DTG-8 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?

regional news image
BBC London 4.9m homes 18.4%
from London W1A 1AA, 30km southeast (138°)
to BBC London region - 55 masts.
regional news image
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?

1984-971997-981998-20122012-1318 Apr 2018
B E TB E TB E TE TK T
C29ArqB
C31ArqA
C34_local
C37SDN
C40BBCA
C41ITVwavesITVwavesITVwavesD3+4
C42_local
C43D3+4
C44BBC2wavesBBC2wavesBBC2wavesBBCA
C46BBCB
C47C4wavesC4wavesC4wavesBBCB
C50tv_offSDN
C51tv_offBBC1wavesBBC1wavesBBC1waves
C55tv_offArqB
C59tv_offArqA

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

Which companies have run the Channel 3 services in the Crystal Palace transmitter area

Sep 1955-Jul 1968Associated-Rediffusion†
Sep 1955-Jul 1968Associated TeleVision◊
Jul 1968-Dec 1992Thames†
Jul 1968-Feb 2004London Weekend Television♦
Jan 1993-Feb 2004Carlton†
Feb 2004-Dec 2014ITV plc♦
Feb 2004-Dec 2014ITV plc†
Feb 1983-Dec 1992TV-am•
Jan 1993-Sep 2010GMTV•
Sep 2010-Dec 2014ITV Daybreak•
• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only. Hemel Hempstead was not an original Channel 3 VHF 405-line mast: the historical information shown is the details of the company responsible for the transmitter when it began transmitting Channel 3.

Comments
Thursday, 15 September 2011
Transmitter engineering
sentiment_very_satisfiedOwner

4:34 AM

HEMEL HEMPSTEAD transmitter - Freeview BBC Digital TV (Four, Cbeebies, Parliament, 3... Off Air; DSO related from 03:36 yesterday to 04:01 yesterday BBC Digital TV (One, Two, Three, CBBC, News) Off Air; DSO related from 01:34 yesterday to 04:20 yesterday Analogue BBC ONE Off Air from 01:35 yesterday to 02:03 yesterday [BBC]

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Transmitter engineering's 150,632 posts xx flag
Transmitter engineering
sentiment_very_satisfiedOwner

4:34 AM

HEMEL HEMPSTEAD transmitter - Freeview BBC Digital TV (Four, Cbeebies, Parliament, 3... Off Air; DSO related from 03:36 yesterday to 04:01 yesterday BBC Digital TV (One, Two, Three, CBBC, News) Off Air; DSO related from 01:34 yesterday to 04:20 yesterday Analogue BBC ONE Off Air from 01:35 yesterday to 02:03 yesterday [BBC]

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Transmitter engineering's 150,632 posts xx flag
C
claire
8:02 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 1 post GB flag
claire's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage
Briantist
sentiment_very_satisfiedOwner

8:20 AM

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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Briantist's 38,915 posts GB flag
B
Bryan
11:39 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 1 post GB flag
Bryan's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
M
Mike Dimmick
sentiment_very_satisfiedPlatinum

11:44 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 Dimmick's 2,486 posts GB flag
M
Mike Dimmick
sentiment_very_satisfiedPlatinum

11:45 AM

Bryan: See my advice to Claire, you probably still have a Group B aerial.

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Mike Dimmick's 2,486 posts GB flag
M
Mike Dimmick
sentiment_very_satisfiedPlatinum

12:14 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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Mike Dimmick's 2,486 posts GB flag
A
A G Halden
1:19 PM

No digital signal on channels 1 2 80 all this week

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A G Halden's 1 post GB flag
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Your comment please
Please post a question, answer or commentIf you have Freeview reception problems before posting a question your must first do this Freeview reset procedure then see: Freeview reception has changed, Single frequency interference, and Freeview intermittent interference.

If you have no satellite signal, see Sky Digibox says 'No Signal' or 'Technical fault'

If you have other problems, please provide a full (not partial) postcode (or preferably enter it in box at the top right) and indicate where if aerial is on the roof, in the loft or elsewhere.

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