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.
Are there any planned engineering works or unexpected transmitter faults on the Hemel Hempstead (Hertfordshire, England) mast?
Hemel Hempstead transmitter - Hemel Hempstead transmitter: Possible effect on TV reception week commencing 27/11/2023 Pixelation or flickering on some or all channels 
_______
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
|
|
Wednesday, 4 April 2012
K
KMJ,Derby1:15 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 |
B
brian english2:23 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's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
Tuesday, 10 April 2012
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 |
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 |
Monday, 16 April 2012
D
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.
| link to this comment |
David's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
D
David Joynson2:54 PM
St. Albans
Sorry. Typing error I meant 'power increase on 18th April.'
| link to this comment |
David's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
J
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.
| link to this comment |
Tuesday, 17 April 2012
D
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?
| link to this comment |
David's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
J
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.
| link to this comment |
Wednesday, 18 April 2012
HEMEL HEMPSTEAD transmitter - Freeview BBC Digital TV Off Air; DSO related from 00:22 today [BBC]
| link to this comment |
Select more comments
Your comment please