12 volt telly with built in freeview

Why not look at an alternative method then?
A Freeview compatible USB stick/receiver such as this one:

http://www.amazon.co.uk/August-DVB-T205-Freeview-Tuner-Stick/dp/B002EHVP9C

There are of course others but the important thing here is that it should have a connector for an external antenna for weak to marginal signal areas and it should be compatible with the newer HD channels.
These sticks simply connect to a USB port on your PC/laptop.

 

If you need an external antenna, then look for the smaller wideband log period types.
Avoid a masthead amplifier as much as possible (unless absolutely required) and if you buy one, make sure it's completely shielded as the cheaper ones are not and allow "ingress" of out-of-band signals which tend to saturate the amplifier and in turn completely mess up the bit error rate of the wanted Freeview channels.

 

Correction to my post above:
It should be log periodic and not log period types.

What I also forgot to mention is that many of the newer Android based Multimedia players/set top boxes also support the USB DVB-T "stick tuners".

 

Cheers Dave, i'm just looking for some media that wont use up my bandwidth on my mobile broadband magic box

 

You're welcome @Zigs.

 

You're running a fridge from your battery?

 

Arr, only a small one, it runs off gas too, but the gas leaks, so probably not a good idea

 

A fridge will draw a lot of power. Maybe look at fixing the leak?

 

Haven't got a gas certificate

 

Me either, but I know what I'd do

 

Just to clarify, the leak is coming from the fridge? If so, better left to the experts

 

Hasn't stopped you eating the curried beans.

 

Hmm, gives me an idea for a gas supply...

 

I used to run tv(old type tv)and video and fridge in the lorrys with not to much of a problem,put that was 24volts droped down to 12volt, in winter time you had to be carefull, if you had the night heater going has well then you couldn't start the lorry next morning

 

Another option would be a rechargeable TV receiver/wifi transmitter enabling watching TV on a smartphone, tablet or laptop without using up data allowance. The aerial with them only works in an area of good reception, but most have a socket for your home aerial to plug in (using jack plug/co-ax adapter). But you can't surf the web and view wifi TV at the same time.