No, they certainly have not gone, nor is there any prospect of them going for a good while.Turned on TV tonight and no BBC1 or BBC2, tried a re-tune but still not there. HD is there on 101 and 102 though. Does that mean the non HD ch's have gone now?
Panasonic HZ2000 TV.
I am really puzzled as to what is going on.Location always helps in diagnosing TV reception issues and likelihood of interference from other transmitters.
Noting that such interference is quoted as a %age of time and often only occurs around dawn and dusk... making accurate diagnosis more difficult.
Detailed transmitter information for industry professionals has a prediction tool.
Modern TVs have an ability to auto-retune / add and remove channels (unless the feature is deliberately disabled) and might account for the behaviour seen?
Hi thanks both of you for your replies, there is some pretty technical info there.Communal aerial systems are often over-amplified and that can lead to tuner overload. But Harlow is far enough from CP to make this relatively unlikely on a properly set up and maintained system.
Harlow Post Office CM20 1JD has decent enough predictions with a slight possibility of occasional enhanced propagation interference. <=1% of time
Also shows good reception from Sandy Heath. Plus Sudbury and Hertford relay get in.
YOUR predictions will differ, of course.
Wolfbane: CP is diffracted, not line of sight, and only 52dBuV/m at 10 metres; Sandy is also diffracted and 46dbuV/m. The CP number is sufficient for a low gain aerial to work outside; but overload would be very unlikely - unless a masthead amplifier is involved.
Communal systems (if large enough number of users) should, ideally, be using channelised (filtered) amps for each multiplex to avoid amplifying unwanted transmitters' signals. Similarly they should use double screened cabling to avoid any potential direct cable pickup.
Mobile masts interference: check out Restore TV | TV Signal Interference | TV Filters With COM7 closing the communal system owners should remove any ch 55 amp for that (if applicable) and consider fitting a low pass filter to the aerial and amplifier input to ensure all 5G and LTE signals are eliminated.
I'd agree that all your cables should be checked and rechecked, though.
A likely 'interference' source could be hdmi leads; that might vary depending on what the hdmi devices are doing (even when nominally in standby). A loose TV plug may allow more in than one firmly seated. Separation and better screened cables can help.
Latest engineering works and warnings | Help receiving TV and radio isn't currently warning of any weather-related interference issues (last time was March).
I don't have a proper signal meter so have no idea if the signal from the mini LOG is enough, probably isn't really but it should be ok for temporary diagnosis purposes, ch 22 and 35 are borderline which is to be expected with this type of aerial I suppose, but I cannot risk putting up anything larger as my landlord will have a hissy fit.LP +6dB CP @30m agl 57dBuV/m (still diffracted) -3 db cable terminations = 60dBuV --- the ideal being between 45 and 65 dBuV at the TV = perfect.
My Panny TV showed 10/10 for signals before and after digital switchover when there was a 10x power increase (+10 dB), because it measures after the auto gain control and error correction circuits. They seem to have changed that, and use %age on yours (much more useful for diagnostic purposes). I have one in the bedroom that is similar for metering purposes.
Best wishes for reliable reception now.
That log will be fine. Perfect in fact if the predicted numbers at your location are similar to those for the (near random) postcode I used.I don't have a proper signal meter so have no idea if the signal from the mini LOG is enough, probably isn't really but it should be ok for temporary diagnosis purposes, ch 22 and 35 are borderline which is to be expected with this type of aerial I suppose, but I cannot risk putting up anything larger as my landlord will have a hissy fit.
That won't harm the TV in any way whatsoever. If the TV isn't wall-mounted I'd be having a good look at the TV aerial socket to see if anything can be gently 'adjusted' to improve the grip on centre pin and/or outer of the plug. Especially of the plug feels loo se at all. Also try to remove any significant aerial cable weight from said connection (Panny TV usually have cable management tie points for cable routing to assist with that) to reduce any chance of the TV plug moving due to such a weight.What was really concerning me was the TV picture constantly turning on and off when the signal went away and came back every few seconds, don't think it's doing the TV any favours so I needed to do something about it.
That's a rather nonsensical remark. The current licence fee applies to all television reception in the UK not solely that from the BBC. But I expect you really knew that.Least technically you won't have to pay the tv licence anymore