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Freeview Light on the Seaham (County Durham, England) transmitter

first published this on - UK Free TV
sa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps54.830,-1.376 or 54°49'47"N 1°22'33"Wsa_postcodeSR7 8LB

 

The symbol shows the location of the Seaham (County Durham, England) transmitter which serves 6,700 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 Seaham (County Durham, England) mast?

SEAHAM transmitter - Freeview: Off the air due to a fault from 26 May 14:59 until 26 May 20:09. Off the air due to a fault from 26 May 13:47 until 26 May 20:09. Off the air due to a fault from 26 May 05:16 until 26 May 10:21. . BBC


Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name
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Which Freeview channels does the Seaham 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
C41 (634.0MHz)150mDTG-100W
Channel icons
1 BBC One (SD) North East and Cumbria, 2 BBC Two England, 9 BBC Four, 23 BBC Three, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, plus 16 others

PSB2
D3+4
 V max
C44 (658.0MHz)150mDTG-100W
Channel icons
3 ITV 1 (SD) (Tyne Tees), 4 Channel 4 (SD) North ads, 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 North ads, 18 More4, 26 ITV4, 28 ITVBe, 30 E4 +1, 35 ITV1 +1 (Tyne Tees),

PSB3
BBCB
 V max
C47 (682.0MHz)150mDTG-100W
Channel icons
46 5SELECT, 101 BBC One HD North East and Cumbria, 102 BBC Two HD England, 103 ITV 1 HD (ITV Granada), 104 Channel 4 HD North ads, 105 Channel 5 HD, 106 BBC Four HD, 107 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

H/V: aerial position (horizontal or vertical)

Are you trying to watch these 44 Freeview channels?

the effected channels
the effected channels
the effected channels
the effected channels

The Seaham (County Durham, England) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: 4seven, 5Action, 5STAR, 5USA, Al Jazeera Eng, Al Jazeera English, Blaze, Blaze +1, Challenge, Channel 5 +1, Dave, Dave ja vu, DMAX, Drama +1, E4 Extra, YAAAS!, Film4 +1, Food Network, GREAT! action, GREAT! movies, GREAT! romance, GREAT! romance mix, HGTV, HobbyMaker, ITV2 +1, ITV3 +1, ITV4 +1, ITVBe +1, Legend, PBS America, Quest +1, Quest Red, Really, Sky Mix, Sky News, Talking Pictures TV, TCC, That's 90s, That's TV 2, Together TV, TRUE CRIME, TRUE CRIME XTRA, W, Yesterday +1.

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 Seaham transmitter?

regional news image
BBC Look North (Newcastle) 1.6m homes 6.0%
from Newcastle NE99 2NE, 22km northwest (315°)
to BBC North East and Cumbria region - 70 masts.
regional news image
ITV Tyne Tees News 1.4m homes 5.4%
from Gateshead NE11 9SZ, 24km northwest (308°)
to ITV Tyne Tees region - 47 masts.
All of lunch, weekend and 50% evening news is shared with Border

How will the Seaham (County Durham, England) transmission frequencies change over time?

1984-971997-981998-20122012-1313 Nov 2019
B E TB E TB E TB E K TB E K T
C41ITVwavesITVwavesITVwavesBBCBBBCA
C44BBC2wavesBBC2wavesBBC2wavesBBCAD3+4
C47C4wavesC4wavesC4wavesD3+4BBCB
C51tv_offBBC1wavesBBC1wavesBBC1waves

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 12 Sep 12 and 26 Sep 12.

How do the old analogue and currrent digital signal levels compare?

BBCA, D3+4, BBCB 100W
Analogue 1-4(-2.3dB) 59W

Which companies have run the Channel 3 services in the Pontop Pike transmitter area

Jan 1959-Feb 2004Tyne Tees 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. Seaham 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
Monday, 13 March 2023
Transmitter engineering
sentiment_very_satisfiedOwner

5:07 AM

Seaham transmitter - Seaham transmitter: Possible effect on TV reception week commencing 13/03/2023 Screen may go black on some or all channels [DUK]

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Transmitter engineering's 151,554 posts GB flag
Saturday, 13 May 2023
C
Chris.SE
sentiment_very_satisfiedPlatinum

11:24 PM

Alan Thompson:

It's current weather conditions! There's some significant "Tropospheric Ducting" affecting parts of your area at this time. Do NOT retune.

These conditions cause signals from distant transmitters in Europe or the UK to travel further and result in interference to your wanted signals. This doesn't always affect all multiplexes at the same time and may not affect all viewers. It can last seconds, minutes or for longer. There is little you can do except wait until conditions improve - or try watching online etc.

If you did retune when you had badly pixellated pictures or no signal (never advised if you were correctly tuned) this usually just clears your correct tuning. You'll then have to retune again which you may have to try several times as you won't know when signals will be normal.

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Chris.SE's 4,201 posts GB flag
Friday, 30 June 2023
Transmitter engineering
sentiment_very_satisfiedOwner

11:09 AM

SEAHAM transmitter - Freeview: Wrong regional programme due to a fault from 26 Jun 22:23 until 26 Jun 22:31. . [BBC]

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Transmitter engineering's 151,554 posts GB flag
Wednesday, 5 July 2023
Transmitter engineering
sentiment_very_satisfiedOwner

4:06 AM

SEAHAM transmitter - Freeview: Wrong regional programme due to a fault from 5 Jul 00:05 until 5 Jul 01:32. . [BBC]

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Transmitter engineering's 151,554 posts GB flag
Saturday, 8 July 2023
A
Alan Thompson
12:22 AM

New transmitter Burnhope is now live to replace burnt out transmitter, same problems. Today no channels since teatime and everytime there is high pressure we lose services, currently none available on freeview. Apparently Seaham (SR7) is in a shadow area and you'd have thought when a new transmitter was installed it would eradicate those shadow areas but maybe we aren't important enough to put it right.

link to this comment
Alan Thompson's 2 posts GB flag
A
Alan Thompson
12:29 AM

New transmitter Bilsdale is now live to replace burnt out transmitter, same problems. Today no channels since teatime and everytime there is high pressure we lose services, currently none available on freeview. Apparently Seaham (SR7) is in a shadow area and you'd have thought when a new transmitter was installed it would eradicate those shadow areas but maybe we aren't important enough to put it right.

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Alan Thompson's 2 posts GB flag
C
Chris.SE
sentiment_very_satisfiedPlatinum

1:53 AM

Alan Thompson:

The new (replacement) Bilsdale mast started transmitting TV signals on the 22nd May and the HD services on the 4th June. Work is yet to be completed to fully restore Radio, Mobile and other services.

It was never intended, nor indeed possible to amend the coverage provided by the transmitter. The coverage and transmitter powers are controlled by international agreements. The mast height and antennae are like for like with the old mast. Those areas that are in a "shadow" will remain so, due to the location of the transmitter and the terrain between it and any such given locations.

Parts of Seaham, primarily the coast to the South of Seaham can get good signals from Bilsdale.
Other parts of Seaham can only get signals from the Seaham relay transmitter (PSB multiplexes only) which should give good coverage to the whole Seaham area, and it is technically a relay of the Pontop Pike transmitter which cannot reliably be received in Seaham.

We do need a full postcode to look at your predicted reception from the various transmitters.

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Chris.SE's 4,201 posts GB flag
S
Steve Donaldson
sentiment_satisfiedSilver

3:44 PM

Alan Thompson: If your aerial points to Bilsdale then check that the PSB channels of BBC1 and ITV are in fact tuned to Bilsdale and not the local Seaham relay. It is a possibility across the area that automatic tuning could pick up the relay instead of the main transmitter, thereby potentially resulting in variable or intermittent reception. Checking the receiver is tuned to the correct transmitter is the first thing to do in such a situation.

Without being familiar with the area, and having looked at the map I thought that the Seaham relay is well-placed to give good signal across the whole town. However, having plotted the terrain at sample locations in Northlea, Deneside and Dawdon it turns out that the line-of-sight path to rooftops, where it exists is low to rooftops under it.

Owing to the fire at Bilsdale, the transmission power at Seaham was increased and a horizontal component added. We don't know whether this has been reverted back to how it was before. The vertical component is a cardioid from a little before 12-o'clock position to a little beyond four-o'clock position (see the radiation pattern shown above on this page). The HP signal isn't as wide as the VP one, judging by the photos on mb21. In those photos it appears to point north (or thereabouts), the opposite direction to Bilsdale. The Freeview predictor says that the VP is 200W and the HP is 600W. It is therefore more likely than before that receivers in the area could pick up the Seaham relay where the aerial points to Bilsdale (or Pontop Pike).

The Freeview predictor seems to be the only source of technical parameters for TV. Ofcom publishes a technical parameters spreadsheet for broadcast radio but I haven't found an equivalent for TV. We also don't know whether the Seaham relay (and other relays) have been reverted back to how they were prior to the Bilsdale fire, and if they have not been, whether they will be or whether they will be left as is. It's quite possible that the Freeview predictor hasn't been updated. It still shows the higher-power Eston Nab HP signals (installed following the Bilsdale fire).

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Steve Donaldson's 212 posts GB flag
C
Chris.SE
sentiment_very_satisfiedPlatinum

4:36 PM
Nottingham

Steve Donaldson:

Just to add a bit more technical interest/confusion into the mix (not really relevant for Alan Thompson) but both Sunderland and Seaham which are both relays of Pontop Pike both had HP added in 2022 (Jan. & March respectively) yet according to the OFCOM spreadsheer they are both SFNs with Chatton!!
This has got to be an error on the spreadsheet as Sunderland uses different UHF channels - confirmed in the 2019 Clearance, and reception of Chatton at Seaham is listed as poor, in fact so poor there are no details, so can it be SFN, I can find no confirmation of that anywhere else?

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Chris.SE's 4,201 posts GB flag
Chris.SE's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage
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