We are Finchley Aerials, with 25 years' experience and a practical approach: establish what fails, locate the loss of quality, then explain the repair. Our advice is free. We agree the visit arrangements and give you a clear price before work starts, rather than arriving with a replacement aerial already decided.
Start with the rooms that still work
A working television is useful evidence. We ask whether the bedroom loses the same channels as the lounge, whether sound continues during a frozen picture and whether reception changes after rain. In a divided Victorian house, two neighbouring flats may not even share the same aerial. We establish the wiring arrangement before comparing symptoms.
Keep the existing tuning if possible. Scanning again while the feed is absent can remove stored services without correcting the cause. Bring us the channel names and a photograph of any message instead. We can then distinguish a tuning issue from a damaged broadcast feed and choose sensible test points.
Measuring beyond the strength display
The percentage bar on a television is not a complete reception test. We connect our meter and examine level, modulation error ratio, usually called MER, and bit error rate, or BER. A high level accompanied by poor MER tells a different story from a clean signal weakened by a long cable.
We check several multiplexes, the frequency groups that carry sets of channels. If one group deteriorates while others remain usable, we investigate frequency-dependent cable loss, interference and aerial response. We explain which results are confirmed and which need further access; a single reading beside the television cannot establish everything happening on the roof.
Highgate Hill, rooflines and reception margin
Archway Tower, neighbouring buildings and the ground rising towards Highgate can affect the signal reaching a lower roof. Around Whittington Park and Dartmouth Park, we assess the actual aerial position rather than assuming a taller pole is always the answer. Additional height only earns a recommendation when tests demonstrate an improvement and the structure can support it.
Crystal Palace is a starting point for reception checks. Where the site warrants comparison with the Alexandra Palace relay, we explain its more limited channel selection before considering a change. Our objective is dependable quality with useful margin, not simply the strongest reading or a mounting position copied from next door.
Checking whether mobile signals are involved
We investigate possible 4G/5G interference using the meter's spectrum display and controlled comparisons. An unwanted mobile signal can overload an amplifier before the television receives anything useful. Poor reception alone does not prove this is happening, even when a mast is visible from your window.
If a suitable filter improves the measured result, we establish where it belongs. Protection normally needs to be ahead of the component being overloaded; a filter behind that component cannot undo distortion already introduced. We also examine screening, loose plugs and damaged coax so that filtering does not become a substitute for repairing defective wiring.
Following the feed through a conversion
Shared front doors and converted landings make cable ownership important in N19. We identify the incoming feed, any powered amplifier and the branches serving the agreed rooms. Comparing readings before and after a splitter helps separate a defective connection from a problem already present at its input.
We need permission before disturbing communal equipment or accessing another flat. If a locked cupboard or shared roof prevents the next test, we record that limitation and agree who will arrange access. We do not disconnect neighbours to see whether your picture changes. Safe accessible checks inside your home can often narrow the investigation first.
Rain, gusts and faults that disappear
Water entering a cable can make reception deteriorate only during wet weather. Movement at a connector can produce a different pattern during gusts. We inspect accessible outdoor joints, cable support and signs of damage alongside the measurements, without asking you to climb up and look for us.
An intermittent fault may remain absent during our visit. Your notes about weather and affected channels then become valuable. We document what we can reproduce, explain the remaining possibilities and agree any further observation. We will not describe an aerial as proven faulty just because the picture failed on a previous evening.
Proving the repair at the television
A typical job here: a converted terrace has clear pictures downstairs but intermittent breakup in an upper room. We compare the branch input and outlet, check the flylead separately and locate the point where quality drops. The repair follows that evidence, whether the cause is a connector, cable section or distribution component.
After approved work, we repeat the relevant meter checks and test the connected television. Where several outlets are included, we verify those as well. We show you the difference, identify anything left outside the agreed scope and leave working equipment in service. Retuning comes after the feed is stable, not in place of fixing it.
Arrange access before the visit
Tell us about shared roofs, parking restrictions and the person who holds cupboard keys when booking. Exterior work depends on safe access and available daylight. Our on-site work runs until sunset, with appointments arranged around the conditions rather than a promise to climb any roof in any weather.
Call 0800 206 2385 free, Monday to Saturday, 8am-7pm, or WhatsApp 07595 292534 with the symptoms. We offer same-day attendance where possible. Finchley Aerials and Satellites is based at Britannia Road, Finchley N12 9RU; we explain the proposed diagnostic scope before arranging your Archway visit.