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

Brian Butterworth first published this on 1st May 2004 at 08:20 - UK Free TV

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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.

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.

Mux	H/V	Frequency	Height	Mode	Watts
PSB1 BBCA	V max	C40 (626.0MHz)	214m	DTG-	2,000W
	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)	214m	DTG-	2,000W
	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)	214m	DTG-	2,000W
	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 66 TBN UK,
COM4 SDN	V max	C37 (602.0MHz)	214m	DTG-8	2,000W
	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)	230m	DTG-8	2,000W
	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)	230m	DTG-8	2,000W
	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?

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	ITV_waves	ITV_waves	ITV_waves	D3+4
C42				_local
C43					D3+4
C44	BBC2_waves	BBC2_waves	BBC2_waves	BBCA
C46					BBCB
C47	C4_waves	C4_waves	C4_waves	BBCB
C50_{tv_off}				SDN
C51_{tv_off}	BBC1_waves	BBC1_waves	BBC1_waves
C55_{tv_off}				ArqB
C59_{tv_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 London

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

Sep 1955-Jul 1968	Associated-Rediffusion†
Sep 1955-Jul 1968	Associated TeleVision◊
Jul 1968-Dec 1992	Thames†
Jul 1968-Feb 2004	London Weekend Television♦
Jan 1993-Feb 2004	Carlton†
Feb 2004-Dec 2014	ITV plc♦
Feb 2004-Dec 2014	ITV plc†

Feb 1983-Dec 1992	TV-am•
Jan 1993-Sep 2010	GMTV•
Sep 2010-Dec 2014	ITV 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.

Is the transmitter output the same in all directions?

Transmitter engineering

_{sentiment_very_satisfied}Owner

6:08 AM

- Freeview: BBC TV Off Air; related from 00:31 today to 01:27 today, HD Digital TV Off Air; DSO related from 00:31 today to 01:29 today. [BBC]

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Transmitter engineering's 150,632 posts xx flag

Transmitter engineering

_{sentiment_very_satisfied}Owner

6:08 AM

- Freeview: BBC TV Off Air; related from 00:31 yesterday to 01:27 yesterday, HD Digital TV Off Air; DSO related from 00:31 yesterday to 01:29 yesterday. [BBC]

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Transmitter engineering's 150,632 posts xx flag

M

Malcolm Trotter
11:45 AM

Hi--since yesterday (Friday AM) i have been unable to receive HD channels on both my TV sets which receive signals from a mounted - carried out auto tune on both sets but still no HD channels. I live in Abbots Herts and receive from which i note was having work undertaken during the early hours of Friday.

Any idea what may be my problem?

Many Thanks

Malcolm

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Malcolm Trotter's 4 posts GB flag

Transmitter engineering

_{sentiment_very_satisfied}Owner

6:08 AM

- Freeview: BBC TV Off Air; related from 00:31 on 07 Sep to 01:27 on 07 Sep, HD Digital TV Off Air; DSO related from 00:31 on 07 Sep to 01:29 on 07 Sep. [BBC]

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Transmitter engineering's 150,632 posts xx flag

MikeP

_{sentiment_very_satisfied}Platinum

10:30 AM

Malcolm Trotter:

Please put your full post code into this website so that we can check the predicted conditions at you location.

There has been some engineerin g work done on the in the last few days and you may now find that a aerial is required to get all the available .

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MikeP's 3,056 posts GB flag

M

Malcolm Trotter
1:06 PM
Abbots Langley

MikeP: Thank you for your reply-- my is rooftop mounted pointing directly at the which i can see from my property. The aerial is approx ten years old and has not been problematic. As stated earlier i am receiving all other on both my TV sets with no .

Ive tried the Freeview reset on both sets with no changes resulting.

I have typed in my postcode into this website and the web shows i should be receiving a good including HD signals from the Hemel transmitter

i was aware of the problem on my main TV when i turned it on Friday morning with a message no channels available where upon i carried out Auto Retune resulting in the absence of HD channels.

My other TV was still receiving channels but reported the HD channels as lost or weak signal. i carried out an auto retune on the second set but to no avail.

regards,

Malcolm T

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Malcolm Trotter's 4 posts GB flag

Malcolm's: M's Freeview map M's terrain plot M's frequency data M's Freeview Detailed Coverage

A

Anthony Collins
9:44 AM

: Hi I'm a local handyman in and I have received lots of customers contact me over losing like BBC1&2, is there a problem with the transmitter or is this a permanent change and will they have to buy a new ?

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Anthony Collins's 2 posts GB flag

S

StevensOnln1

_{sentiment_very_satisfied}Platinum

11:30 AM

Malcolm Trotter & Anthony Collins: Since the recent changes, viewers using the may need a aerial to receive all multiplexes. If the missing cannot be restored by retuning, you should contact the Freeview Advice Line (see link below) who will arrange for a replacement wideband aerial to be fitted (free of charge for viewers who don't have or ).

Important changes to Freeview TV signals | Freeview

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StevensOnln1's 3,622 posts GB flag

M

Malcolm Trotter
3:51 PM
Abbots Langley

StevenOnln1
Thank you for the advice-- called re the above and attempted several manual and auto retunes over the phone but still have same problem. Freeview advise they have no record of any recent retunes or recent work.

Freeview did however state they had received a similar channel loss inquiry today from the same area

New free replacement only undertaken if they have carried out a planned retune with a transmitter.

Was advised to wait a couple days as the missing may return (similarly advised by shop).

Looks like might be an aerial issue and was given the number of a local aerial company they approve based in Apsley

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Malcolm Trotter's 4 posts GB flag

Malcolm's: M's Freeview map M's terrain plot M's frequency data M's Freeview Detailed Coverage

Transmitter engineering

_{sentiment_very_satisfied}Owner

6:08 PM

- Freeview: BBC TV Reduced from 14:39 today, BBC Digital TV Off Air; related from 00:31 on 07 Sep to 01:27 on 07 Sep, HD Digital TV Reduced Quality from 14:39 today, HD Digital TV Off Air; DSO related from 00:31 on 07 Sep to 01:29 on 07 [BBC]

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Transmitter engineering's 150,632 posts xx flag

Page 50

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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