Water tower to dwelling

I remember ITV setting up a transmitter about a mile away [1] in direct line of sight, in the 1960s. I'd have been about 14. It swamped everything. I made and tuned my own attenuator.

Now how will the tv faceplate (or a socket) fit on an exterior wall in the bedrooms?

I wonder why they did that, if its not listed, they could surely have blown it up or bulldozed it and built a more up to date building? Brian

Round here the only interesting ones I've found seem to be public toilets converted into.Art gallery, Bungalow and restaurant, not the same one though!

Brian

Because there's always some signal pick-up at the TV set itself, strong attenuation could result in pre- or post-echo in the analogue days. If the aerial was local to the TV set the result would be signal cancellation in an unpredictable manner, and that is what happens with DTT. If the aerial is remote, such as with a distribution system, you'd see 'ghosts'. However, massive signal levels should appear at outlets on a system. That's unless the tenant has climbed into the loft and bypassed a high value tap-off unit!

Incidentally a lot of aerial installers short out braid to inner with one or two strands rather than use an attenuator. Why? Because they're stupid.

Bill

I wonder how far from a straight line the wall will deviate across the width of a wallplate?

Bill

I am sure a 9mm plastic extension on the back box (assuming the front of the back box is on a tangent to the line of the wall so it is hidden) will bring the accessory far enough forward.

Taking the tower as a circle with a diameter of 10m then a 146mm double socket would have a maximum gap of 0.53mm - well within the IP4x.

Before the most recent frequency changes I was changing my old group C/D loft-mounted aerial for a log-periodic job and noticed that even with no aerial at all I could still get a clean picture and sound on the main HD channels (from Midhurst) with just the builders coax running up from the lounge and lying loose in the loft.

Thank you.

Bill

Yes, builder's coax receives signal and interference quite well!

Bill

So actually that's a smaller gap than on a Taylor Wimpey new build flat wall:-)

Thanks for the calculations. Much appreciated.

I am on slow time this week with no access to a mobile phone or computer in the day time.