Full Freeview on the Hemel Hempstead (Hertfordshire, England) transmitter
 | Google map |  | Bing map |  | Google Earth |  | 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._______
Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
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 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.
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 | ITVwaves | ITVwaves | ITVwaves | D3+4 | |||||
| C42 | _local | ||||||||
| C43 | D3+4 | ||||||||
| C44 | BBC2waves | BBC2waves | BBC2waves | BBCA | |||||
| C46 | BBCB | ||||||||
| C47 | C4waves | C4waves | C4waves | BBCB | |||||
| C50tv_off | SDN | ||||||||
| C51tv_off | BBC1waves | BBC1waves | BBC1waves | ||||||
| C55tv_off | ArqB | ||||||||
| C59tv_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 LondonWhich companies have run the Channel 3 services in the Crystal Palace transmitter area
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Monday, 16 April 2012
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David Joynson2:39 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's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
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David Joynson2:54 PM
St. Albans
Sorry. Typing error I meant 'power increase on 18th April.'
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David's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
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jb383:42 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.
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Tuesday, 17 April 2012
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David Joynson10:10 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?
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David's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
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jb385:14 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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Wednesday, 18 April 2012
E
Esther12:23 PM
Hi, i have an Alba tv with built in freeview.I have lost all channels the the TV will not accept the menu button to retune.I then bought an all in one remote,wich wont even turn the tv on!! What should i do ?
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jb381:17 PM
Esther: As far as what to do is concerned, it would be of assistance for anyone offering advice to have knowledge of your location, (pref: post code or one from nearby) as the signal levels expected in you area could then be assessed as its possible that you might be receiving a signal thats excessively powerful, and that alone can block reception.
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Bernard Hatt11:29 PM
Hemel Hempstead
Just been rescanning/retuning my Freeview receiver attached to a Linux computer, and everything works fine apart from COM4/SDN and COM5/ArqA.
Both are shown on your listing with the FEC value of 2/3, but I can only tune in to scan with the value of 3/4.
Not sure if it's a problem with your listing or my software, but I thought I'd mention it in case anyone else has a similar problem.
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Bernard's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
Thursday, 19 April 2012
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James2:31 PM
Berkhamsted
Hi all. I also retuned yesterday (in Berkhamsted, using the Hemel Hempstead transmitter) but dissapointed to find that COM5 and COM6 are completely unwatchable and breaking up on all my TV's (eg. Pick TV on COM5 and Yesterday COM6).
Prior to DSO, all channels on all muxes were working fine.
Does anyone know what could be causing this? Could it be something in my setup that DSO dislikes or, is there still work going on at the Hemel transmitter perhaps? I notice that there is still the "roadworks" symbol on map above. Please can anyone else using the Hemel Hempstead transmitter confirm if they're getting the same problem?
Thanks a lot,
James.
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James's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
Wednesday, 9 May 2012
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Andrew Healy2:34 PM
Ashford
James,
in Ashford, I am gforced to use the HH transm itter as my aerial is fixed verticvally (Crystal Palace needs a horizontal one). My reception from HH is OK, but, the ArqivaB multiplex is unreachable- not essential but an annoying glitch. Is there a plan to ramp up the actual power this multiplex ?
| link to this comment |
Andrew's: mapA's Freeview map terrainA's terrain plot wavesA's frequency data A's Freeview Detailed Coverage
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