All posts by Avon tv Aerials of Bath
Below are all of Avon tv Aerials of Bath's postings, with the most recent are at the bottom of the page.
safety measures in are trade and many others boils down to common sense and if the rigger hasn't got any of that they certainly wouldn't be working for me.
Most of the riggers that I have got to know over the years have always secured ladders where required but not necessarily with eye bolts but tied to the roof batten.
In certain circumstances the use of roof ladders can actually be more of a danger than pushing up tiles and walking up the battens.
It all boils down to individual jobs and the buildings your working on.
The hard hat which has to be worn on sites is understandable but when actually on the roof above everyone else, What is its purpose apart from bird pooh.
Safety boots or commonly known as rigger boots which again is insisted on site work are great when working on clay tiles but no good on slate, where as trainers are the safest option.
Finally and most importantly, If a job in your opinion cannot be done reasonable safe which means you don't feel at ease with the job then you have the option and really should walk away.
Personally I think its only a matter of time before all rooftop ladder work will be outlawed because there is no such thing as safety working at heights where ladders and getting on roofs are concerned, You can be careful as you like taking all safety measures into account but its still very dangerous work , and that is why taking adequate safety measures is still a very grey and shaded area .
Regards
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The only way you can be sure what Aerial is required, if infact one does need replacing is for a aerial rigger to various test procedures with his or her meter.
Far as replacment Aerial there is no one including myself that could give you a competent answer sat round a desk without getting on your roof with a aerial and meter to deside what is or would be required.
However if you dont mind a over size aerial to play safe make sure your chimney lashing mounts and mast are adequate to take the load, after all signal can be reduced in various ways , its just big Aerials look horrible and if not needed its amature and not practical.
If you want my advise I would be looking at your coaxial downlead because quite often substandard or old coaxial cable can deteriorate and often not handling the lower frequencys as well as further up the scale , although adequate signal strenth often remains it is the errors within the bits that give the problems measured as bit error rate. (BER) which should be the first thing the rigger does soon as he/she walks through your front door. Firstly before calling anyone out check the fly lead running from wall socket to TV , if its one of those molded end type thin leads replace with better quality after that without a meter your fairly knackered.
All the best
Dave
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Hi Frederica
4G problems are quite rare although it is and can be a problem more than lightly its a system fault
First thing you need to investigate, are others on the same communal system having the same symtoms?
If the only one with problems and your sure your tuned into correct channel frequencys hook another TV up to the same outlet to prove its not or is your TV at fault.
IIf others also have a problem and your TV equipment is ok then you will need to contact the building management services that maintains your property to deal with it
Regards
Dave
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Maybe of interest to some of you here
In Bath we have had a number of jobs come in that have been directly caused since the last most recent re tune on the main Mendip transmitter which incidentally wasn't far off the date we experienced a earth tremor .
customer reported faults ranging from loss of certain channels,almost all channels and intermittent loss of channels.
The two things they all had in common was firstly There location in respect to the mendip transmitter were not line of site Fringe areas of Bath where in the old days of Analog reception the signal strength would have been good but ghosting would have been a typical problem.
Secondly they all were terminated into various Distribution amplifiers feeding either extra rooms or and individual flats.
In every instance the signal strength reading were reading ok the problem was the signals were so corrupt with bit errors.
Nine times out of 10 with the meter readings I was getting the fault would be the voltage regulation withing the distribution amplifier/Multiswitcher which depending on replacement cost we either repair back in the workshop or replace but in these instances it was not the case.
Having gained access to the input of the amplifiers directly from aerial found the readings on various frequency's were a bit to high for the amplifiers and basically saturating the signals.
Cures were a mixture of attenuating the signal inputs of the larger IRS systems to replacing the domestic amps with inductive splitters where Amplification was not now required.
Nobody is to blame for these problems its down to a number of thing including equipment such as specification of coaxial cables been used etc, All have better or worse db gain/losses/ noise figures at given frequency's which doesn't just end there you also have outside variables that can be frequency dependent which these instances are a typical example.
Dave
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Sunday 24 November 2013 3:34AM
How can anyone here give a fair unbiased comment on whether or not Mr Robinson's dad was over charged or without seeing the job.
Nick may well be right in his comment because none of us know the length of cable runs and what work was involved getting them there.
For all we know he may have been moving furniture lifting carpets pulling floor boards to get access to other rooms.
I was doing one a few months ago and was having to cut out tong and grove polished flooring from front to back of the house due to lack of rear access, and they didn't want to see any cables, which I wouldn't of either.
Anyway that job was started 9-15am and finally after retuning there TVs and PVR to Mendip Walked out the house at around 6-30pm and that was just two outlets back and front of the house with Aerial on the roof.
.So what could have been a 2 hour job and invoiced as such turned out a full days work with know breaks and one cup of tea, which made the bill which had been quoted before work commenced quite expensive comparing to a typical two outlet system.
Jamie... You say CAI bench marked cable as if its a guaranteed quality cable without stating part numbers, Well I can a sure riggers and customers alike its not a guarantee of top notch quality cable, there are various grades .
For example Televes produce a RG6 type cable that's got the bench mark which is very cheap.
If you look at the construction and specification you will see why, I personally wouldn't chance it even for fly leads because of its screening properties.
Some Information for everyone:
You got to be careful these days because the equipment that been churned out from some of the manufactures where the screening is so sparse they are using impregnated plastics with carbon instead of tin copper your liable to all sorts of problems if using cheaper coaxial cables.
I have done various tests in the workshop that relate to this and when hooking up a spectrum analyser and monitoring equipment like the typical sky box and some of these PVRs branded and unbranded alike, you would be suprised at what crap they radiate. The typical fly lead from wall socket to equipment and interconnecting leads are critical if not more than the down lead itself due to close proximity.
So its worth baring in mind its not just outside interference you have to worry about its also and often internal.
Some of these cheaper cables with the typical 12 meter down lead from stack to front room are OK far as signal strength, the problems that often arise is the errors within the signal due to screening and overall construction that's picked up on the way, and it will not get solved by fitting way over sized aerials that were never required in the first place like we see so many of.
Mr Robins
The reason why your been able to switch off the signal to all 4 TVs from the wall switch is because the rigger has used a form of distribution amplifier that's power supplied via a power supply unit plugged into your wall socket and fed via the TV coaxial lead .
Allot of riggers do it this way if there is no permanent supply near to where the distribution unit is installed which is often in the roof space.
The way around this is get a qualified electrician to take the mains feed from a permanent live source normally upstairs lighting circuit, fed into a fused spur fused at 3AMP then everything is neat and tidy.
Regards