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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-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
Wednesday, 4 April 2012
K
KMJ,Derby
sentiment_satisfiedGold

1:15 PM

brian english: That is correct, as Mux BBCA after switchover contains all the BBC standard definition TV and radio channels. These were divided between Mux1 (now switched off) and MuxB which has to remain on air as it carries Sky Sports on the pre-switchover configuration of the muxes. When using auto scan Mux BBCA on C23 or C44 will usually be placed in the normal (LCN) positions in the channel list as it is found before MuxB on C28 or C59, the BBC channels in MuxB will then appear as variations in the 800's. If doing a manual tune between the two stages of the switchover it is usual to omit MuxB unless Sky Sports is required.

link to this comment
KMJ,Derby's 1,811 posts GB
B
brian english
2:23 PM
Abbots Langley

KMJ - thanks for the info - very enlightening

A couple of the boxes have complained about this and tuning has failed - so I will have to tune the manual way and leave BBCA off my TUTV Sky Sports box for 2 weeks

Whoever the genius was that decided to leave duplicate channels on C59 (pointing at HH not CP) is truly worthy of a Darwin award

link to this comment
brian english's 2 posts GB
Tuesday, 10 April 2012
Transmitter engineering
sentiment_very_satisfiedOwner

10:29 AM

HEMEL HEMPSTEAD transmitter - Over the next week Hemel Hempstead main transmitter: TV (digital) working normally, Radio (analogue) working normally, Radio (digital) working normally. [DUK]

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

10:29 AM

HEMEL HEMPSTEAD transmitter - Over the next week Hemel Hempstead main transmitter: TV (digital) working normally, Radio (analogue) working normally, Radio (digital) working normally. [DUK]

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Transmitter engineering's 138,029 posts xx
Monday, 16 April 2012
D
David Joynson
2:39 PM
St. Albans

By how much are the digital transmitter powers going to be increased on the 8th April? We have difficulty with one of our three digital boxes which has a simple antenna in one bedroom at the moment but this might correct itself if the power is increased enough on all the digital channels. The (better?) box in the other bedroom works well with an identical set-up.

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David Joynson's 5 posts GB
D
David Joynson
2:54 PM
St. Albans

Sorry. Typing error I meant 'power increase on 18th April.'

link to this comment
David Joynson's 5 posts GB
J
jb38
sentiment_very_satisfiedPlatinum

3:42 PM

David Joynson: If Crystal Palace its from 20Kw (10Kw HD) to 200Kw on all muxes, and in the case of Hemel Hempstead its from a mixture of 400 / 200 watts up to 2Kw on all muxes, although you can already get an idea of what reception will be like, as the BBC on both stations have already switched to high power.

link to this comment
jb38's 7,179 posts GB
Tuesday, 17 April 2012
D
David Joynson
10:10 AM
St. Albans

jb38, thanks for comment. Reception is poor at the moment on some channels which from your reply will get better. But on BBC1 our box, which is new, has a really good picture and sound most of the time but occasionally loses sound and if it does it does not come back. We recorded something recently which had no sound after the first few minutes. Is there anything I can do about this?

link to this comment
David Joynson's 5 posts GB
J
jb38
sentiment_very_satisfiedPlatinum

5:14 PM

David Joynson: Although not aware of the actual station you are receiving from as it could be either Crystal Palace (@ 24mls) or Hemel Hempstead (@ 4mls) with both of indicating good reception of the BBC, but you should be aware that if a signal being received is on the verges of being excessively powerful then this can result in the receivers tuner being slightly overloaded and something which can cause various odd problems to occur, so its really the case of carrying out a signal strength check whilst on BBC1 noting the strength seen, as should indications be near to the 100% mark as far as strength is concerned this should be suspected as a possible reason for your problem, so needless to say "if" you have any form of booster fitted then try by-passing it.

Should though you not have a booster in line, then purely for a test if you have access to a set top aerial plug that in and see how things are.

By the way, if you are not sure what transmitter you are receiving from then have a look up at the aerial, if its mounted with the elements pointing up and down then its Hemel Hempstead, but if horizontally mounted then its Crystal Palace.

Regarding the recorder, what brand / model is it? the reason for asking being that there is a range that's inclined to be prone to what you have complained of.




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jb38's 7,179 posts GB
Wednesday, 18 April 2012
Transmitter engineering
sentiment_very_satisfiedOwner

4:29 AM

HEMEL HEMPSTEAD transmitter - Freeview BBC Digital TV Off Air; DSO related from 00:22 today [BBC]

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Transmitter engineering's 138,029 posts xx
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