On 26/07/2011 12:35, fred wrote:
In article , John
Rumm writes
On 21/07/2011 15:13, fred wrote:

The questions about DSO and grouped aerials are important. If your bod
stuck up a wideband one and the channels broadcast by your transmitter
are in the newly extended group B (low) then you have lost 4-6dB of
precious signal just like that cos wideband aerials aren't optimised
like grouped ones and favour the high end. (A wideband aerial will have
a black plug in the back of the aerial extrusion.)

Yup grouped aerials are particularly important for group A and B
transmitters - especially in difficult locations.

If you're pre-DSO then you'll be seeing a whacking improvement in signal
power when DSO happens in your area.

Indeed - we saw a rise of 19db overnight on the muxes that have just
gone full power.

Sadly not 'til Sept '12 in this case. COM3 on that transmitter is
currently on 1.5kW so at 28miles distant I doubt there's any realistic
chance of decent reception of the bemoaned missing Dave etc until DSO.

Not hopeless necessarily, I am a similar distance from our transmitter
and we still have two muxes on 1.5 and 1.1kW - both of which we are
getting with decent quality.

I skipped the group K suggestion as here seem to be so few about these
days and didn't think it would give enough lift anyway in this situation.

At the lower end, a K will give a significant improvement over a wideband.

The analogue transmitter is currently on 500kW and will become 100/50kW
at switchover so options should open up then.

Indeed.

--
Cheers,

John.

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