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Full Freeview on the Sudbury (Suffolk, England) transmitter

first published this on - UK Free TV
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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.

Are there any planned engineering works or unexpected transmitter faults on the Sudbury (Suffolk, England) mast?

Sudbury transmitter - Sudbury transmitter: Possible effect on TV reception week commencing 18/10/2021 Possible Pixelation or flickering on some or all channels Digital tick


Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name
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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.

MuxH/VFrequencyHeightModeWatts
PSB1
BBCA
 H max
C44 (658.0MHz)229mDTG-3100,000W
Channel icons
1 BBC One (SD) East, 2 BBC Two England, 9 BBC Four, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, 250 BBC Red Button, plus 15 others

PSB2
D3+4
 H max
C41 (634.0MHz)229mDTG-3100,000W
Channel icons
3 ITV (SD) (Anglia (East micro region)), 4 Channel 4 (SD) South ads, 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 South ads, 18 More4, 25 ITV4, 29 E4 +1, 34 ITV +1 (Anglia east),

PSB3
BBCB
 H max
C47 (682.0MHz)229mDTG-6100,000W
Channel icons
72 Shopping Quarter , 101 BBC One HD (England no regional news), 102 BBC Two HD (England), 103 ITV HD (ITV Meridian Southampton), 104 Channel 4 HD South ads, 105 Channel 5 HD, 204 CBBC HD, plus 1 others

COM4
SDN
 H max
C29 (538.0MHz)186mDTG-3100,000W
Channel icons
 CCXTV, 12 Quest, 20 Drama, 21 5USA, 28 ITV2 +1, 31 5STAR, 32 Paramount Network, 41 GREAT! movies action, 45 Channel 5 +1, 55 5SELECT, 57 ITVBe +1, 58 ITV3 +1, 59 ITV4 +1, 63 Blaze, 66 CBS Reality, 68 Horror Channel, 73 Drama +1, 77 TCC, 80 Blaze +1, 203 CITV, 211 Ketchup TV, 212 YAAAS!, plus 15 others

COM5
ArqA
 H max
C31- (553.8MHz)228mDTG-8100,000W
Channel icons
11 Sky Arts, 17 Really, 19 Dave, 30 4Music, 35 pick, 39 Quest Red, 42 Food Network, 46 Film4 +1, 47 Challenge, 48 4seven, 56 Smithsonian Channel, 69 Quest +1, 74 Yesterday +1, 82 Together TV, 233 Sky News, plus 9 others

COM6
ArqB
 H max
C37 (602.0MHz)228mDTG-8100,000W
Channel icons
23 Dave ja vu, 26 Yesterday, 33 GREAT! movies, 38 DMAX, 40 CBS Justice, 43 HGTV, 67 CBS Drama, 81 Talking Pictures TV, 84 PBS America, 234 RT, 235 Aljazeera English, plus 18 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 11 Freeview HD channels?

the effected 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: BBC Four HD, BBC News HD, CBeebies HD, Quest HD, Forces TV, FreeSports, More4 +1, Now 70s, PBS America +1, Quest Red +1, RT HD.

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?

regional news image
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
regional news image
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 WestTransposer1000 homes +1000 or more homes due to expansion of affected area?
WithamTransposer14 km NE Chelmsford.118 homes

How will the Sudbury (Suffolk, England) transmission frequencies change over time?

1984-971997-981998-20112011-131 Aug 2018
B E TB E TB E TE TK T
C29SDN
C31ArqA
C35C5wavesC5waves
C37ArqB
C41ITVwavesITVwavesITVwavesD3+4D3+4
C44BBC2wavesBBC2wavesBBC2wavesBBCABBCA
C47C4wavesC4wavesC4wavesBBCBBBCB
C51tv_offBBC1wavesBBC1wavesBBC1waves
C56tv_offArqB
C58tv_offSDN
C60tv_off-ArqA

tv_off Being removed from Freeview (for 5G use) after November 2020 - 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

Oct 1959-Feb 2004Anglia Television
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. Sudbury 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
Friday, 31 August 2018
H
Hardy
sentiment_satisfiedSilver

8:57 PM

Z beams need to be long in A group ,short at CD . Just like standard Yagis. They were not As broadband as X so were fairly evenly spaced . You might notice that X directors are closer together near the dipole to control the overall aerial bandwidth. Thick or x elements can be around 0.8 as long as equivalent thin elements.
I was an electronics technician . College courses were in telecommunications and radio.
looking at the gain diagrams of the various types if aerial on that aerial website I listed is very educational.

link to this comment
Hardy's 137 posts GB
N
nick horrex
sentiment_satisfiedGold

11:57 PM

thanks Hardy

link to this comment
nick horrex's 369 posts GB
Saturday, 1 September 2018
N
nmugford
sentiment_satisfiedSilver

11:39 AM

hi,nick,i think strict impedance matching isnt required,most domestic equipment is loosely coupled,but i would try changing the ali dipole for a copper wire ,i changed a set top to same and got a locked picture at 45 miles from hannington at ground level,the aluminiun wouldnt supply enough for a locked picture.What were the benefits signal wise of the bbc X?

link to this comment
nmugford's 120 posts GB
H
Hardy
sentiment_satisfiedSilver

2:30 PM

The old large X in analogue days was no better than an H . THey were just cheaper to make . A bit of a gimmick rather like tri beam aerials are today. The only advantage was that some versions of the X could reduce unwanted reception at 90 degrees from the wanted direction.

link to this comment
Hardy's 137 posts GB
Sunday, 2 September 2018
N
nmugford
sentiment_satisfiedSilver

9:32 PM

to hardy,tks for the explanation,if i made a version for 27mhz what sort of radiation pattern horizontally?

link to this comment
nmugford's 120 posts GB
N
nmugford
sentiment_satisfiedSilver

9:37 PM

hi hardy,i remember now,i lived in swindon and some parts had chronic multi path,so the X might have helpful,ta nick

link to this comment
nmugford's 120 posts GB
Monday, 3 September 2018
H
Hardy
sentiment_satisfiedSilver

4:03 PM

A 27 MHz X would have arms each about 9 feet long ! with a similar response to an H . A quad driven element with quad reflector would have more gain and sharper beam and take up less space.

Nick . an excellent DIY wifi aerial is here Making your own Bi-Quad (Wi-Fi) antenna

link to this comment
Hardy's 137 posts GB
Tuesday, 4 September 2018
N
nick horrex
sentiment_satisfiedGold

9:47 AM

hi, nmugford.

Do you mean make the existing dipole shape from copper instead of aluminium?
The only times I have done that, the only difference has been a heavier aerial.

link to this comment
nick horrex's 369 posts GB
N
nick horrex
sentiment_satisfiedGold

9:58 AM

Hardy,

thank you for the link to wi fi aerial. I have made several like that, even double biquad, but they are not powerful enough. Adding directors has proved no better, presumably because the added gain is negated through mismatch of impedance. It is very frustrating making wi fi aerials when you know you have good designs but have no way of knowing the impedance nor of how to match. Far and away my best wi fi aerial is a sky dish with cantenna, but took many days of experimenting with where to place the receiving rod, [length 30mm] within the can,how far to place the can from dish, angle of that can to dish etc.

Many of my designs are based on a 1950's book designed for builders of aerials for band 1!

Since we have also moved on to cb aerials, would a SWR meter, and a box to adjust SWR for cb aerials, be of any use with aerials for 2.4ghz? I guess not.

link to this comment
nick horrex's 369 posts GB
H
Hardy
sentiment_satisfiedSilver

3:43 PM

Nick . I don't see how you can build better than a parabolic dish ! Unless you look in your book for a really old but efficient aerial a dual rhombic. These are huge for shortwave but not too bad at UHF and above .
You can buy wifi extenders which have the electronics combined with the aerial (look on Amazon) I have one that reaches nearly a mile range. SWR matching is not so important for reception . So you can just guess and use a 1:1 balun for a low impedance dipole or a 4:1 for a higher impedance dipole . A basic dipole is about 73 ohms but adding directors and reflectors brings it lower . So a folded dipole is used which is 300 ohms by itself but adding elements brings it nearer to 75. the Xs are effectively full wavelenth so are high impedance. I found an article that described the tall narrow rectangle that you use as having a low impedance around 50 ohms. Apparently the rectangle is equivalent to one bent half wave dipole stacked on another.

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Hardy's 137 posts GB
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