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All posts by Ian

Below are all of Ian's postings, with the most recent are at the bottom of the page.

I
Hemel Hempstead (Hertfordshire, England) Full Freeview transmit
Wednesday 14 March 2012 9:52AM
Berkhamsted

I have recently moved to a house 5 miles north west of the Hemel Hempstead transmitter. On the website it says this is a repeater and I should position my aerial elements vertically. However everyone in this area appears to have their elements positioned horizontally including me! Before I waste time and effort climbing up on the roof is everyone else wrong or am I missing something?

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GB
I
Hemel Hempstead (Hertfordshire, England) Full Freeview transmit
Wednesday 14 March 2012 10:13AM
Berkhamsted

On further investigation - Because I can currently receive HD I wonder if in fact we (and everyone else) are getting our signals fom Crystal Palace which is in approximately the same direction fom here as the HH transmitter. Presumably after 18th April I should reposition to vertical for a really strong signal from HH ?

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GB
I
Hemel Hempstead (Hertfordshire, England) Full Freeview transmit
Wednesday 14 March 2012 5:28PM
Berkhamsted

Thanks KMJ Derby, however according to this website the power of the three possible transmiters and distance to me is:
Crystal Palace 20kW - 30.5 miles
Sandy Heath 180kW - 27.2 miles
Hemel Hempstead 400W - 5.3 miles

Using inverse square law to calculate signal strength this means that CP is a little less than twice as strong as HH but CP is only 9% of SH.

So SH would be the optimum signal as long as I could live with Anglia and BBC East!!

If there is an error on this website and CP is actually 200kW as you suggest then SH is still slightly stronger but not much in it but both better than HH.

:-)

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GB