Digital radio switchover gets poor reception

"Woody" wrote in message
news:[email protected]
" wrote in message
...
On Jun 2, 10:57 pm, tony sayer wrote:
In article [email protected], Woody
scribeth thus

"Dave Plowman (News)" wrote in message
...
In article [email protected],
Woody wrote:
Band 1 has never been used for TV in the UK.


AIRI Band 1 was something like 41-68MHz, certainly 'E' band PMR was and
still is (technically) 68-88MHz although 87.5-88 was cleared a few years
ago to permit short term VHF broadcast stations (like for the Great
Yorkshire Show, etc.)

Although some people may have used frequencies in what we would class as
Band 1 it was never available for PMR use in the UK. The US used to use
frequencies in the 35-40MHz region for police radio after the war which
continued until the 70's, but most of that band un the UK was allocated
for MoD use.



The use of 47 MHz that I mentioned was in the UK and quite legal, i.e.
licensed.

In article
..com, scribeth thus
On Jun 2, 10:57*pm, tony sayer wrote:
In article [email protected], Woody
scribeth thus

"Dave Plowman (News)" wrote in message
...
In article [email protected],
* Woody wrote:
Band 1 has never been used for TV in the UK.

Eh?

--
Sorry, senior moment. Should have read '...never been used for
PMR in the UK.'

Has .. but very limited use but darn sarff, and IIRC now fallen out of
favour...
--
Tony Sayer

Wouldn't all that PMR stuff just above the old ch B5 be within Band
I?

Bill

Well Band 1 is up to 68 MHz and what's called VHF Low band is from 68 to
88 MHz. The lowest in current use in Low band data which is usually 68
mobile TX and 81/2 base Tx but these are quite few and far between...

--
Tony Sayer

In article [email protected], Woody
scribeth thus
" wrote in
message
...
On Jun 2, 10:57 pm, tony sayer wrote:
In article [email protected], Woody
scribeth thus

"Dave Plowman (News)" wrote in message
...
In article [email protected],
Woody wrote:
Band 1 has never been used for TV in the UK.

Eh?

--
Sorry, senior moment. Should have read '...never been used for
PMR in the UK.'

Has .. but very limited use but darn sarff, and IIRC now fallen
out of
favour...
--
Tony Sayer

Wouldn't all that PMR stuff just above the old ch B5 be within
Band
I?

Bill


AIRI Band 1 was something like 41-68MHz, certainly 'E' band PMR
was and still is (technically) 68-88MHz although 87.5-88 was
cleared a few years ago to permit short term VHF broadcast
stations (like for the Great Yorkshire Show, etc.)

Don't remember any fuss info re clearing that bit of Band 2 which would
have been 87.6 to 88 there was a lot of fuss getting rid of mobile TX
from 105 to 107.9 ...

Although some people may have used frequencies in what we would
class as Band 1 it was never available for PMR use in the UK.

Well they were using Band 1 for PMR a while ago in the London area but
it wasn't that successful. Come to think of it that was being used for
CBS (Common Base Stations) a type of shared radio. There was a bloke at
Ofcom who's moved on now who would have been able to give a fair bit of
detail on that but I've lost touch with him now..

The main reason was lack of Type approved kit IIRC...

The
US used to use frequencies in the 35-40MHz region for police
radio after the war which continued until the 70's, but most of
that band un the UK was allocated for MoD use.

And a lot of others;!..



--
Tony Sayer

In article , MB
scribeth thus


"tony sayer" wrote in message
...
In article , charles
scribeth thus
In article ,
Dave Plowman (News) wrote:
In article ,
tony sayer wrote:


Beg to differ with my 'learned friend but as far as I remember neither
Band 1 or 3 were sold off at all unlike cellular licences..

FWIW Band 1 has hardly any PMR thereon due to the absurdly long aerials
required, the impossibility of using portables and the lack of type
approved equipment/s..

Band 3 is of course used by some PMR, bus and Trains and data systems
tho some of these especially the trains will migrate over to GSM/R in
time..

And ofd course DAB.. Not a lot of demand for licences there it seems..

But none of it was sold off as such...
--
Tony Sayer



We used 47 MHz at one time,

Was this for PMR land mobile use?..

the aerials were not particularly "absurd",

Bad enough!, you won't get yer average cabbie putting up with a low band
whip when he can have a High band one;!...


range was great most of the time though we used to get interference from
Russian fishing boats sometimes. Pye Westminsters were used.

Other low VHF frequencies have been used for PMR at times.






--
Tony Sayer

Bancom Communications U.K. Tel+44 1223 566577 Fax+44 1223 566588

4 Wingate close, Cambridge, England, CB2 9HW E-Mail

"Paul Martin" wrote in message
...
In article [email protected],
Woody wrote:

Band 1 has never been used for TV in the UK.

Not only has Band I been used, but in double sideband mode (Ally Pally
only), and almost all the BBC's 405 line transmissions were in Band I.

MF has been used for TV, too.

--
Paul Martin

I seem to remember in the biography of Armstrong that he used Band II for FM
radio because of availability but later wished he could have had FM radio
around Band I and TV broadcasting around Band II because the increased
susceptibility to long distance propagation on lower frequencies would not
have affected radio as much as TV.

"tony sayer" wrote in message
...
In article , MB
scribeth thus





We used 47 MHz at one time,

Was this for PMR land mobile use?..

the aerials were not particularly "absurd",

Bad enough!, you won't get yer average cabbie putting up with a low band
whip when he can have a High band one;!...



BBC RT use, we had a talk-through system from a 141 MHz channel which could
be activated by a SELCALL system.

The 47 MHz part was fixed so it was a folded dipole on the tower but I have
used a 50 MHz quarter wave and it is not particular unwieldy especially when
you consider many taxis at that time were using 70/80 MHz anyway.

I heard that someone in the power industry was trying to get a temporary
network set up around 50 MHz for the night of the Millennium to enable
direct comms between various points in the system independent of any
hall-top sites or the telephone system.

The BBC also tried out a mobile HF comms system in the UK for a time, there
were several channels allocated for mobile use.

"tony sayer" wrote in message
...
In article , charles
scribeth thus
In article ,
Dave Plowman (News) wrote:
In article ,
tony sayer wrote:
snip
FWIW Band 1 has hardly any PMR thereon due to the absurdly long aerials
required, the impossibility of using portables and the lack of type
approved equipment/s..


Wot like this?
http://www.doubleradius.com/Motorola...and-16-Channel

35 to 50MHz is heavily used in the US especially by police depts,
just not here.

Steve Terry
--
Welcome Sign-up Bonus of £1 when you signup free at:
http://www.topcashback.co.uk/ref/G4WWK

In article , Steve Terry
scribeth thus
"tony sayer" wrote in message
...
In article , charles
scribeth thus
In article ,
Dave Plowman (News) wrote:
In article ,
tony sayer wrote:
snip
FWIW Band 1 has hardly any PMR thereon due to the absurdly long aerials
required, the impossibility of using portables and the lack of type
approved equipment/s..


Wot like this?
http://www.doubleradius.com/Motorola...dio-35-50-MHz-
Lowband-16-Channel

35 to 50MHz is heavily used in the US especially by police depts,
just not here.


No there not at all efficient even at 77 odd MHz theres no comparison
with a VHF hi band portable on say 170 MHz.

In around 25 years of PMR operation we must have sold around 3 or 4
handportables for VHF Lo;!.

And a helluva lot on VHF Hi and UHF 1 and 2. And thats not just because
of frequency availability its down to performance. VHF Lowband channels
some have sod all users on nation-wide even!....
..
Steve Terry

--
Tony Sayer

In article , MB
scribeth thus


"tony sayer" wrote in message
...
In article , MB
scribeth thus





We used 47 MHz at one time,

Was this for PMR land mobile use?..

the aerials were not particularly "absurd",

Bad enough!, you won't get yer average cabbie putting up with a low band
whip when he can have a High band one;!...



BBC RT use, we had a talk-through system from a 141 MHz channel which could
be activated by a SELCALL system.

Rather unusual practice, in the UK normal CTCSS would be used works very
well...

The 47 MHz part was fixed so it was a folded dipole on the tower but I have
used a 50 MHz quarter wave and it is not particular unwieldy especially when
you consider many taxis at that time were using 70/80 MHz anyway.

Well lets say 50 Mc/s thats 1350 mm not insignificant and if you put a
loading coil on that its efficiency is much less as the receive will be
13.5 or 10 MHz away..

We've had transit vans on Lowband and lorries too, average aerial life
is around a couple of weeks even spring loaded ones!..


I heard that someone in the power industry was trying to get a temporary
network set up around 50 MHz for the night of the Millennium to enable
direct comms between various points in the system independent of any
hall-top sites or the telephone system.

Blimey haven't they got enough spectrum already;?..

Just dragging it back to broadcast there are some Audio point to point
and Talkback links in there around 48 to 52 MHz odd..

http://www.jfmg.co.uk/pages/freq/ground/40_100mhz.htm


The BBC also tried out a mobile HF comms system in the UK for a time, there
were several channels allocated for mobile use.




--
Tony Sayer

On Sat, 29 May 2010 15:20:00 +0100, tony sayer
wrote:

There's enough of a hill that we need either a stacked pair like me
and some of the neighbours or a Monstrosity Pigeon Perch like some of
the others here but even that doesn't help in other parts of the town.
If they could repurpose some of the Orfordness Project they could
probably get a good signal facing inland which would fill some of the
gaps.

Humm on second thoughts you are a bit shadowed there according to our
terrain set. Course thats not a very tall mast there (Taccy) and your up
in the 700 odd MHz region group C so perhaps to be expected.

Drop me a valid e-mail and you can have the image.....

I think I already have one from the site whose url I completely forget
but yes the signal just makes it over the hill here but not in other
parts of the town, be interesting to see if DSO turns up the power
enough to alleviate this


Still haven't been to Southwold for a while now the Adnams just across
the road from the brewery is excellent

That's the old brewery I presume? The new one is out of town with a
grass roof.

Just shows how long ago it was;!.. Perhaps an expedition is in order..

I would. The pier has been pretty much reconstructed too.

Sometimes Southwold and Orford can become overfull in the
holiday season but there are plenty other places you can go instead.
Local places for local people . . .

Tell me about it I live in Cambridge we know what tourists are like;!...

I used to be one once G I had my honeymoon in Suffolk. I no longer
have the wife and now I live here. Go figure. It's where we came from
about three generations back and I feel like I've come home.

You can always tell the tourists

"I don't care if you're an 18 wheeler with three cars behind you, I
SHALL not reverse my Volvo" and if you pull off the road to let them
through they NEVER thank you (locals might stop for a chat . . .)