All posts by Steve Flynn
Below are all of Steve Flynn's postings, with the most recent are at the bottom of the page.
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Crystal Palace (Greater London, England) Full Freeview transmitTuesday 12 February 2013 10:36PM
Haslemere
Crystal Palace - answering my own question and asking another.
I replaced all internal cabling and fitted a new distribution amp and have restored my missing channels.
However although I now have good signals on BBC-A, D3+4 and BBC-B I don't get any signal at all from SDN, ArqA or ArqB multiplexes from Crystal Palace.
Digital UK tradeview does not show these channels as being available but they are listed here as being broadcast from CP at the same power as the other multiplexes. Why can't I receive them from CP? I can get them from Hannington but they are at a lower level and I am on the outer edge for good reception from there.
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Crystal Palace (Greater London, England) Full Freeview transmitTuesday 12 February 2013 11:08PM
Haslemere
Dave Lindsay: Thanks, I had forgotten about co-channel interference which in this case is 100% effective in the worst way. Predictions around DSO seemed to change on a daily basis so I wasn't sure what I would eventually get.
I don't think I want yet another aerial on my pole so phased array isn't an option. A local installer suggested switching my CP aerial to vertical but I may look at a better aerial for Hannington instead.
Thanks again, at least I know there is little I can do now.
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Crystal Palace (Greater London, England) Full Freeview transmitWednesday 13 February 2013 1:55PM
Haslemere
Dave Lindsay: Maybe I should swap houses with the man from Grayswood :)
My Hannington aerial is Group E and I see that the transmitter is now listed as Group B. I think the theoretical difference in gain between otherwise similar B and E group aerials is about 2dB but would this make enough of a difference for those lower powered Mux's?
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Crystal Palace (Greater London, England) Full Freeview transmitWednesday 13 February 2013 9:47PM
Haslemere
Dave Lindsay: Reception varies, at present COM5 is pretty good with quality at 8-9 out of 10 but COM 4 & 6 are only at quality 1-2. Strength is around 7-8 on all.
The gain curves on your link seem to show that a B Group aerial would be a better bet but I guess I should check that my current aerial is giving the best it can first.
My amplifier is in circuit to diplex TV and FM as well as distribute to different rooms but I don't think it is causing any problems with too strong a signal - I bypassed it just to check.
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Crystal Palace (Greater London, England) Full Freeview transmitFriday 15 March 2013 11:32AM
Haslemere
Update:
Our local aerial installer suggested and tried a phased array to reject co-channel interference from the Haslemere transmitter but unfortunately it didn't work.
My existing aerial system was deteriorating so I had it replaced with better quality aerials and diplexer and now have excellent signals on the PSB mux's from CP and Hannington as well as much better signals from the Hannington COM mux's.
Thanks for your help in understanding all this.
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It is clear that there is a severe problem with reception from this transmitter despite this site and the linked site claiming there is no problem.
Is there any way to report this transmitter fault or complain to the operator?
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Jamie, definitely not a problem with my setup which is all new this year. Also see recent complaints above from others suffering the same problem.
The signal strength from Hannington is good but there is no signal quality and no channels available apart from the odd intermittent blip. There is clearly a transmitter problem.
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Thursday 10 January 2013 1:28PM
Haslemere
Lost BBC from Crystal Palace.
I have recently lost BBC channels on channel 23 from Crystal Palace. HD on ch 30 also weak however ITV channels from the same transmitter on ch 26 are excellent so the aerial system is clearly working.
I have two aerials pointing at Hannington and Crystal Palace diplexed then fed into an old Labgear distribution amp together with an FM aerial signal. Hannington signals are fine. I want the London BBC channels for local news.
Any idea why only the BBC signals are affected? There aren't any engineering works listed so I am baffled. Could it be the distribution amp?