menuMENU    UK Free TV logo Freeview

 

 

Click to see updates

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
_______

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-32,000W
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, 250 BBC Red Button, plus 15 others

PSB2
D3+4
 V max
C43 (650.0MHz)214mDTG-32,000W
Channel icons
3 ITV (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, 30 E4 +1, 35 ITV +1 (London),

PSB3
BBCB
 V max
C46 (674.0MHz)214mDTG-62,000W
Channel icons
56 5SELECT, 101 BBC One HD (England no regional news), 102 BBC Two HD (England), 103 ITV HD (ITV London), 104 Channel 4 HD London ads, 105 Channel 5 HD, 106 BBC Four HD, 109 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

COM4
SDN
 V max
C37 (602.0MHz)214mDTG-82,000W
Channel icons
12 Quest, 20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 41 Legend, 42 GREAT! movies action, 46 Channel 5 +1, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 CBS Reality, 74 Dave ja vu, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 203 CITV, 208 POP MAX, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, plus 15 others

COM5
ArqA
 V max
C31 (554.0MHz)230mDTG-82,000W
Channel icons
11 Sky Arts, 17 Really, 19 Dave, 31 E4 Extra, 36 pick, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 57 Smithsonian Channel, 60 Drama +1, 70 Quest +1, 75 Yesterday +1, 83 Together TV, 233 Sky News, plus 8 others

COM6
ArqB
 V max
C29 (538.0MHz)230mDTG-82,000W
Channel icons
 FreeSports, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 71 Quest Red +1, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 88 Classic Hits, 235 Aljazeera English, plus 19 others

DTG-3 64QAM 8K 2/3 24.1Mb/s DVB-T MPEG2
DTG-6 256QAM 32KE 2/3 40.2Mb/s DVB-T2 MPEG4
DTG-8 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?

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
Saturday, 10 March 2012
Transmitter engineering
sentiment_very_satisfiedOwner

4:30 AM

HEMEL HEMPSTEAD transmitter - Freeview BBC Digital TV (One, Two, Three, CBBC, News) Weak Signal from 13:06 on 06 Mar to 13:11 on 06 Mar Analogue BBC ONE Off Air from 18:08 yesterday to 18:23 yesterday BBC TWO Off Air from 18:08 yesterday to 18:23 yesterday [BBC]

link to this comment
Transmitter engineering's 138,029 posts xx
Monday, 12 March 2012
Transmitter engineering
sentiment_very_satisfiedOwner

10:28 AM

HEMEL HEMPSTEAD transmitter - Freeview BBC Digital TV (One, Two, Three, CBBC, News) Weak Signal from 13:06 on 06 Mar to 13:11 on 06 Mar Analogue BBC ONE Off Air from 18:08 on 09 Mar to 18:23 on 09 Mar BBC TWO Off Air from 18:08 on 09 Mar to 18:23 on 09 Mar [BBC]

link to this comment
Transmitter engineering's 138,029 posts xx
Transmitter engineering
sentiment_very_satisfiedOwner

10:28 AM

HEMEL HEMPSTEAD transmitter - Freeview BBC Digital TV (One, Two, Three, CBBC, News) Weak Signal from 13:06 on 06 Mar to 13:11 on 06 Mar Analogue BBC ONE Off Air from 18:08 on 09 Mar to 18:23 on 09 Mar BBC TWO Off Air from 18:08 on 09 Mar to 18:23 on 09 Mar [BBC]

link to this comment
Transmitter engineering's 138,029 posts xx
Transmitter engineering
sentiment_very_satisfiedOwner

12:30 PM

HEMEL HEMPSTEAD transmitter - Analogue BBC ONE Off Air from 18:08 on 09 Mar to 18:23 on 09 Mar BBC TWO Off Air from 18:08 on 09 Mar to 18:23 on 09 Mar [BBC]

link to this comment
Transmitter engineering's 138,029 posts xx
Transmitter engineering
sentiment_very_satisfiedOwner

12:30 PM

HEMEL HEMPSTEAD transmitter - Analogue BBC ONE Off Air from 18:08 on 09 Mar to 18:23 on 09 Mar BBC TWO Off Air from 18:08 on 09 Mar to 18:23 on 09 Mar [BBC]

link to this comment
Transmitter engineering's 138,029 posts xx
Wednesday, 14 March 2012
I
Ian
9:52 AM
Berkhamsted

I have recently moved to a house 5 miles north west of the Hemel Hempstead transmitter. On the website it says this is a repeater and I should position my aerial elements vertically. However everyone in this area appears to have their elements positioned horizontally including me! Before I waste time and effort climbing up on the roof is everyone else wrong or am I missing something?

link to this comment
Ian's 3 posts GB
I
Ian
10:13 AM
Berkhamsted

On further investigation - Because I can currently receive HD I wonder if in fact we (and everyone else) are getting our signals fom Crystal Palace which is in approximately the same direction fom here as the HH transmitter. Presumably after 18th April I should reposition to vertical for a really strong signal from HH ?

link to this comment
Ian's 3 posts GB
K
KMJ,Derby
sentiment_satisfiedGold

10:26 AM

Ian: The aerial is most likely to be pointing at Crystal Palace (SE). If it points NNE it will be pointing at Sandy Heath which at this time delivers the best signal on five of the muxes. After DSO in London which takes place on 4th and 18th April 2012 your best signal is predicted to be from Crystal Palace, which will transmit at 200kW on each mux. The Hemel Heampstead (2kW) relay is shown as variable on the PSB muxes after switchover, possibly due to interference resulting from sharing frequencies with Hannington COM muxes.

link to this comment
KMJ,Derby's 1,811 posts GB
I
Ian
5:28 PM
Berkhamsted

Thanks KMJ Derby, however according to this website the power of the three possible transmiters and distance to me is:
Crystal Palace 20kW - 30.5 miles
Sandy Heath 180kW - 27.2 miles
Hemel Hempstead 400W - 5.3 miles

Using inverse square law to calculate signal strength this means that CP is a little less than twice as strong as HH but CP is only 9% of SH.

So SH would be the optimum signal as long as I could live with Anglia and BBC East!!

If there is an error on this website and CP is actually 200kW as you suggest then SH is still slightly stronger but not much in it but both better than HH.

:-)

link to this comment
Ian's 3 posts GB
Wednesday, 4 April 2012
B
brian english
12:23 PM
Abbots Langley

Crystal Palace/Hemel Hempstead
Has anyone got any idea why as of today BBC4 is listed in two multiplexes and how is my box supposed to tune to it

link to this comment
brian english's 2 posts GB
Select more comments

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.

UK Free TV is here to help people. If you are rude or disrespectful all of your posts will be deleted and you will be banned.








Privacy policy: UK Free Privacy policy.