Hillsborough
Sheffield
S6 2LL
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The transmitter of choice is Emley and the (bottom) unamplified Log 40 gives good
pictures on all channels. At the top of the 16ft semi-
The XB10A in the middle is amplified as well and is on Belmont. Depending upon
climatic conditions we get poor or almost reasonable results. The fact that it faces East
(i.e. toward the Continent) means that in certain weather conditions co-
In addition we have an FM dipole vertically polarised so as to work reasonably well on DAB and also pick up omni directionally, see FM/DAB aerials.
Picture of our shop`s aerial array.
When we mended TVs we needed some kind of signal off all the main transmitters around here in case we have to repair a TV for which we have no remote (to retune it) so we didn`t put up this array just out of interest !
Note the way we have used side
poles to mount the two horizontally polarised aerials which are aligned on Emley Moor (bottom aerial) and
Belmont (middle aerial) respectively. Doing this enables the antennas` cradles to be mounted perpendicular to the dipoles and we found this made a big difference on the
Belmont aerial. We have actually experimented with
incorrectly mounted cradles to see how much difference it makes. The difference is significant.
Amateur Radio antenna array. Note the rotator to “aim” the array where required.
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please help us increase the number of people reading it.
The subjects on this page are listed on the following order,
We are more than willing to give advice to those actually purchasing from us.
Could those only seeking information please just find the answer somewhere on this site,
or ring an aerial installer local to them, or call the reception advice phone numbers.
Amateur radio aerial arrays show the differences in element size most clearly as there is such a huge difference in the frequencies used. The top antenna on the array is for transmitting (and receiving) at a frequency of 1.3GHz which has a wavelength of 23 cm.
The next one down does the same thing but on 14 to 28MHz which equates to wavelengths of 10 to 20 metres. It can be seen that as the frequency rises (and the wavelength
shortens) the antenna dipole/elements become smaller. By the same token an A group TV (UHF) aerial has a larger dipole and elements than a C/D group, see aerial groups.
Just to emphasise the differing size of the elements, the smaller 1.3GHz antenna (at the top) is a 44 element, whereas the huge aerial below it is only a 3 (three ! ) element....
