



Chesterfield / Unstone transmitter at dusk. Picture Justin Smith (ATV)
Chesterfield TV transmitter “Up Close” Picture Justin Smith (ATV)
Chesterfield`s channels in relation to the UHF TV band and the gain curves of the aerials
we recommend for it. DM Log Log40 Yagi18K XB16K
Note the channels out of the original A group of the transmitter, but also that MUX1 and MUX2 should be available to most people in reasonable signal areas.
(see Channel Allocation Guide below)
Some sources classify Chesterfield as a wideband, but if you need all the signal you can
get and you really need a “high gain aerial” (which most people don`t....) the above graph shows quite clearly that a Yagi18K or an XB16K is the way to go. It will be noted that for Chesterfield transmitters output both these aerials outperform wideband tribooms.

We recommend the DM log for strong signal areas, the Log 40 for medium signal areas, the Yagi18K for poor signal areas and the XB16K for those with the most marginal signals. The dimensions and test performance of the antennas can be found on the relevant tables. The prices of the aerials are on the Sales page.
The TX is situated mid way between Dronfield and Chesterfield and is a steel RSJ
spaceframe design. It can be seen on the hill top from the Dronfield By-
(ex Midland) Railway line which passes by in the valley. The former opened in 1975 and
the latter in 1870, doesn`t time fly......
Although it is of reasonable power for a repeater (at 2kW analogue and 40w Digital)
those living in Dronfield may find problems with it because the transmitter is attenuated in
a Northerly direction. Full output is to the SW with good signals in an arc from
SE to NW. Worse still, 4 of the 5 Digital / Freeview MUXES are transmitted on the
same channels as Emley Moor (see Chesterfield`s Channel Allocations) which can lead
to co-
DSO is due to occur in September 2011. It has been confirmed by Ofcom that
Chesterfield will stay a wideband at DSO, but the main 1st three PSB MUXES
will be receivable on an A group.
The BBC also puts out 400W of FM Radio Sheffield (at 94.7 MHz) from this TX.

It should be remembered that because of Wideband antennas poor response at the
bottom of the band nobody should ever fit a “high gain” wideband on any K group
transmitter, e.g. Chesterfield.
If the site is in a poor spot a K group aerial should be used. On the other hand if the signal
is strong (or medium) then by definition it doesn`t need a “high gain” antenna anyway !
Under these circumstances a Log Periodic should be fitted instead.