Full Freeview on the Sudbury (Suffolk, England) transmitter
 | Google Streetview |  | Google map |  | Bing map |  | Google Earth |  | 52.005,0.786 or 52°0'17"N 0°47'8"E |  | CO10 5NG |
The symbol shows the location of the Sudbury (Suffolk, England) transmitter which serves 440,000 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 Sudbury (Suffolk, 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 Sudbury (Suffolk, 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 Freeview channels does the Sudbury 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)
Are you trying to watch these 0 Freeview HD channels?
The Sudbury (Suffolk, 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 Sudbury transmitter?
BBC Look East (East) 0.8m homes 3.2%
from Norwich NR2 1BH, 77km north-northeast (24°)
to BBC East region - 27 masts.
70% of BBC East (East) and BBC East (West) is shared output
ITV Anglia News 0.8m homes 3.2%
from NORWICH NR1 3JG, 78km north-northeast (24°)
to ITV Anglia (East) region - 26 masts.
All of lunch, weekend and 80% evening news is shared with Anglia (West)
Are there any self-help relays?
| Felixstowe West | Transposer | 1000 homes +1000 or more homes due to expansion of affected area? | |
| Witham | Transposer | 14 km NE Chelmsford. | 118 homes |
How will the Sudbury (Suffolk, England) transmission frequencies change over time?
| 1984-97 | 1997-98 | 1998-2011 | 2011-13 | 1 Aug 2018 | |||||
| B E T | B E T | B E T | E T | K T | |||||
| C29 | SDN | ||||||||
| C31 | ArqA | ||||||||
| C35 | C5waves | C5waves | |||||||
| C37 | ArqB | ||||||||
| C41 | ITVwaves | ITVwaves | ITVwaves | D3+4 | D3+4 | ||||
| C44 | BBC2waves | BBC2waves | BBC2waves | BBCA | BBCA | ||||
| C47 | C4waves | C4waves | C4waves | BBCB | BBCB | ||||
| C51tv_off | BBC1waves | BBC1waves | BBC1waves | ||||||
| C56tv_off | ArqB | ||||||||
| C58tv_off | SDN | ||||||||
| C60tv_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 6 Jul 11 and 20 Jul 11.
How do the old analogue and currrent digital signal levels compare?
| Analogue 1-4 | 250kW | |
| SDN, ARQA, ARQB, BBCA, D3+4, BBCB | (-4dB) 100kW | |
| Analogue 5 | (-7dB) 50kW | |
| Mux 2* | (-14.9dB) 8.1kW | |
| Mux B* | (-15.2dB) 7.5kW | |
| Mux 1* | (-15.5dB) 7kW | |
| Mux A* | (-17dB) 5kW | |
| Mux C* | (-22.2dB) 1.5kW | |
| Mux D* | (-23.6dB) 1.1kW |
Which companies have run the Channel 3 services in the Sudbury transmitter area
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Monday, 27 August 2018
H
Hardy9:22 AM
The x is a way of simulating a thick element . Its cheaper and lighter than a true thick element . Thick elements have a wide bandwidth and are shorter than thin elements for a given frequency . You can see true thick element aerials at airports . The j aerial was described as a skeleton slot . I think its more like a stacked quad. Your version of the j is interesting . I think if you like building aerials a "grid" (bill board antenna) is less critical to get right . That's four dipoles in front of a flat screen. It is a medium gain slightly better than a log . I would like to build one with directors tuned for com7/8. In recent times a new version of this a "Hoveman Grey " is popular . seemingly having the same performance but easier to build. Look online.
I will probably stop discussing design here as this site is mainly for answering peoples reception problems. If you would like further discussion I am at dottir@hotmail.com
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Wednesday, 29 August 2018
Thanks Hardy.
Those shallow x's come in two versions, one being like two V's, the other is 4 separate short elements. I can understand the former being 'thick' but not the latter.
By 'grid' do you mean kooman array, ie full wavelength dipoles? I am not sure this would have enough gain and that is what I need or would have gone for a log.
I am experimenting with five rows of reflectors on my J Beam.
I will let you answer reception problems. There are so many of them since they forced us to go wideband, though Sudbury's channels are now closer than before. I hope they leave them that way and a shame they did not make it like that when they went digital.
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H
Hardy3:40 PM
yes a Kooman . but nowadays they use large x shapes rather than true fullwave dipoles to get the full UHF bandwidth . I am 30 miles from Tacolneston so am thinking of building one as it covers the full band with a peak near UHF channel 55 56 handy for com 7 and 8.
A large group K is probably the best you can purchase.
Home building in your area I would build or buy a small group A vertical polarised for ALderbrough com 1 2 3 and combine it with a narrower band amplified version of a group B (horizontal) . com 4 5 6
Adding reflectors wont increase the gain . Would it cut down unwanted reverse direction reception any better than a single large grid reflector?
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Hardy,
would give up on trying to get the weaker channels from Tac, if I were you, specially if on high channels Where are you?
The aerial you describe for me is more or less what I am building. 5 rows of 8 group B directors. Group A square J beam dipole, but while keeping its total length as group A, I have 'squashed' it. It is now a rectangle, vertical, which conveniently makes its width group B. This extra height means I can get 5 rows of directors without them being only a couple of inches apart.
One reflector, about a foot square, netting. Despite J Beam saying it had to be a hollow square slot, like the dipole, that is what I am doing.
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H
Hardy9:01 PM
Ok. Good luck.usually there would be four rows each row with a dipole all fed in phase and having a bigger reflector. The single rectangle might need adjustable size to tune it .
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Friday, 31 August 2018
Hi Hardy, it is built and I am pleased.
On a 12 ft pole in the garden I had a single set of 8 group B directors, my squashed group A J Beam square dipole, no reflector. In broad terms, channel 29 right up to channel 44 showed 60% for signal quality and strength.
I have added 4 extra rows of directors and a mesh reflector behind. Signal strength on 29 near 90%, quality 75% On channel 44, less marked improvement, strength 68%, quality 75%
I cannot test channel 47 as it does not show on my set top box.
I am puzzled that the increase is greater on 29 as this is basically a group B aerial
No amplifier in line.
I have no idea how to tune a reflector so will leave the square grid.
Overall this is far superior to my my factory shallow x aerial
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H
Hardy12:34 PM
That's good news Nick . I think that the addition of the reflector gave the main boost to the gain and made the dipole a better match. Not convinced that so many sets of directors relatively close together give much improvement but it works well . So cant knock it! We are getting warm weather again so any interference due to high pressure will be a good test.
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Hardy, many years ago when we had analogue and no way of knowing with any readings whether the signal was improved or worsened, I held an extra string of directors against a J Beam with only one. The picture improved, so I added two. Without doubt, extra directors above and below are more beneficial than one string of 16. This is the principle of tri booms.
Because my dipole is now 12 inches high, with the top and bottom strings two inches above and below that, the strings are 4 inches apart, and angled so that at the front they are six inches apart.
My reflector is 6 inches away. Maybe it should be closer, but as I do not know how to find the impedance of the dipole, I have settled on that as the directors may well have reduced it below 75 ohms.
I wish I knew how to make a similar one for wi fi, but no idea how to match the dipole.
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Hardy
do you remember the J Beams with 'wiggly' directors? They were in the form of 4 arms, the bottom part at 45 degrees, the top horizontal.
Group a had very large 'arms', c/d small. How do you square this with the shallow x's with their short arms which apparently make them wideband? If short arms do this, then all those old J beams would have had the same length short arms!
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