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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), 71 That’s 60s,

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 U&Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 38 Channel 5 +1, 41 Legend, 42 GREAT! action, 57 U&Dave ja vu, 58 ITV3 +1, 59 ITV4 +1, 64 Blaze, 67 TRUE CRIME, 68 TRUE CRIME XTRA, 81 Blaze +1, 83 Together TV, 91 WildEarth, 93 ITVBe +1, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, 251 Al Jazeera English, 255 FRANCE 24 (in English), 265 Rok Sky +1, plus 29 others

COM5
ArqA
 V max
C31 (554.0MHz)230mDTG-82,000W
Channel icons
11 Sky Mix, 17 Really, 19 U&Dave, 31 E4 Extra, 36 Sky Arts, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 60 U&Drama +1, 65 That's TV 2, 70 Quest +1, 74 &UYesterday +1, 76 That's TV 2 MCR, 233 Sky News, plus 13 others

COM6
ArqB
 V max
C29 (538.0MHz)230mDTG-82,000W
Channel icons
12 Quest, 25 U&W, 27 U&Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 52 GREAT! christmas, 56 That's TV (UK), 63 GREAT! romance mix, 73 HobbyMaker, 75 That's 90s, 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
Briantist
sentiment_very_satisfiedOwner

7:50 PM

Sylvia: I'm glad to hear that worked for you.

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Briantist's 38,915 posts GB flag
Saturday, 17 September 2011
B
Bernard Hatt
11:42 AM

Just found out about the channel change in Hemel:
Mux 1 690MHz -> 754MHz
Mux A 786MHz -> 850MHz

(re-tune and everything is fine - I'm almost line of sight to the transmitter).

Is there any way to subscribe just frequency/channel changes like this, for just this transmitter, so I can find out in advance ?

Thanks,

Bernard

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Bernard Hatt's 2 posts GB flag
K
KMJ,Derby
sentiment_satisfiedGold

12:46 PM

Bernard Hatt: There are currently just two retune days planned for your area for DSO. These are 4th April 2012 and 18th April 2012.

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KMJ,Derby's 1,811 posts GB flag
Thursday, 22 September 2011
J
John Macadam
3:15 PM
Watford

Earlier this year we bought two new Freeview-enabled TVs. We had them set up with a new aerial on the roof, pointed towards Hemel Hempstead, and a new powered booster in the loft. Reception was broadly acceptable, although ITV channels tended to break up on occasion.
On Wednesday the 14th September you carried out some work on the transmitter. Following this, we re-tuned our TVs. We have found, however, that the BBC channels have been adversely affected. They are now worse than the ITV channels, and on one of our TVs they are unwatchable.
Is more work scheduled to fix this, or is there anything else we can do our end?
(Our postcode is WD17 4WF.)

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John Macadam's 1 post GB flag
John's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
Briantist
sentiment_very_satisfiedOwner

10:23 PM

John Macadam: The only "work" that was carried out what the change of frequencies for two multiplexes:

Hemel Hempstead BBC A is expected to temporarily move to channel 56 (at 40W ERP) some months in advance of digital switchover, but will adopt its final allocation at switchover.

Hemel Hempstead SDN is expected to temporarily move to channel 68 (at 40W ERP) some months in advance of digital switchover, but will adopt its final allocation at switchover.

These allocations will remain until switchover: Wednesday 18th April 2012.

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Briantist's 38,915 posts GB flag
Thursday, 13 October 2011
I
Iona
5:29 PM
Hemel Hempstead

Hi, aerial on roof, all well with all BBC digital channels until very recently. Still getting analogue but now no digital channels. Tried taking back to shipping condition of main Freeview tv (all 3 are Freeview tvs.) Tried an old Freeview box, zilch. Spoke to digitaltv help line. Advisor couldnit work out where I had been getting digital channels from! Although getting London News, it didn't look like I was tuned to main Crystal Palace - have always thought been tuned to Bedmond the relay transmitter. It's only since they messed about with this that we have lost all digital channels. Also, advisor thought maybe our aerial has moved slightly and we have lost a 'ghost' signal??!! Have tried manual tuning, get good signal strength on 44 but doesn't find any channels, some signal on 56. Any advice would be appreciated. Spoke to local aerial business who couldn't understand why we couldn't get digital if we were still getting analogue ...

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Iona's 1 post GB flag
Iona's: mapI's Freeview map terrainI's terrain plot wavesI's frequency data I's Freeview Detailed Coverage
Saturday, 15 October 2011
Briantist
sentiment_very_satisfiedOwner

12:11 PM

Iona: If you can get analogue and not digital, then this, at your location, would be because you are using the Hemel Hempstead Town transmitter.

You should have a full Freeview service from the Hemel Hempstead (main) transmitter - can you please see Freeview reception has changed? | ukfree.tv - independent free digital TV advice for things to try.

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Briantist's 38,915 posts GB flag
Monday, 17 October 2011
F
Fabian
10:42 AM
London

Hi,

I live at 19 Monnery Road in Archway, N19 5SA. It's first time I'm buying and aerial so I'm new to all this. I plan to get a HD Freeview indoor aerial. Can someone advise where I should be pointing this aerial to?

Many Thanks,
Fabian

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Fabian's 1 post GB flag
Fabian's: mapF's Freeview map terrainF's terrain plot wavesF's frequency data F's Freeview Detailed Coverage
M
Mike Dimmick
sentiment_very_satisfiedPlatinum

5:53 PM

Fabian: Digital UK suggest that the best option for you is the main Crystal Palace transmitter, which is roughly south-south-east (162°) and 16 km away.

It's very likely that your neighbours' aerials are already facing that direction.

Do be careful of aerials advertised on the Internet and in DIY stores. There is nothing 'HD' or 'Freeview' about any aerial. An aerial *might* be termed 'digital' if it has a balun, a device that better matches the properties of the aerial to the properties of the cable; cheaper aerials designed before digital started might not have had a balun, but an aerial not labelled as 'digital' might still have one.

I assume, by the way, that you're talking about a roof aerial. Indoor aerials can almost never give as good a result as a roof aerial - the elements are always under-sized, UHF signals don't travel well through walls and signals will be attenuated by having to come through neighbours' walls. A small aerial designed for a roof-top can work in a loft, but it's still advisable to put it outside if you can.

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Mike Dimmick's 2,486 posts GB flag
K
Keith
10:39 PM
Hemel Hempstead

I've lost all analogue signal and cannot pick up a digital signal on digital tvs. This has happened in the last couple of days.
I have a loft aerial which may well be quite old but has up till now always provided a good signal, any suggestions as to the cause of the loss of signal?

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Keith's 1 post GB flag
Keith's: mapK's Freeview map terrainK's terrain plot wavesK's frequency data K's Freeview Detailed Coverage
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