| Author |
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informer
Guest
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 Posted:
Tue Jan 18, 2005 6:42 am Post subject:
Re: Is this an FM aerial? Where did it come from? |
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"Marky P" <bromham_hospital_band@yahoo.co.uk> wrote
| Quote: | How much are they?
When I bought my G26 back in 1991, the price was £180. And that was
just the aerial. They came & put it up on a 20 foot mast with a
rotator.
Marky P.
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With free digital radio on sky do we need these sort of aerials now apart
from picking up the local BBC station?
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Malcolm Stewart
Guest
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| Posted:
Tue Jan 18, 2005 8:35 am Post subject:
Re: Is this an FM aerial? Where did it come from? |
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"informer" <no.spam@talk21.com> wrote in message
news:csib4k$m4u$1@hercules.btinternet.com...
| Quote: | "Marky P" <bromham_hospital_band@yahoo.co.uk> wrote
How much are they?
When I bought my G26 back in 1991, the price was £180. And that was
just the aerial. They came & put it up on a 20 foot mast with a
rotator.
Marky P.
With free digital radio on sky do we need these sort of aerials now apart
from picking up the local BBC station?
|
I thought "Sky" had some form of entrance fee. Let me know if I'm wrong,
and how I can enjoy satellite carried "free" programmes without contributing
to BSB or similar.
--
M Stewart
Milton Keynes, UK
http://www.megalith.freeserve.co.uk/oddimage.htm |
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Mark Carver
Guest
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| Posted:
Tue Jan 18, 2005 2:16 pm Post subject:
Re: Is this an FM aerial? Where did it come from? |
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Malcolm Stewart wrote:
| Quote: | I thought "Sky" had some form of entrance fee. Let me know if I'm wrong,
and how I can enjoy satellite carried "free" programmes without contributing
to BSB or similar.
|
Almost every radio station on Sky's platform is unencrypted. Therefore
you can simply purchase a second hand Sky box on EBay, stick up a dish,
and away you go. Better still, get any non Sky satellite receiver and
use that instead, or get a DVB-S card for your PC and receive that way.
Have a look at the Sky Digital FAQ: http://tinyurl.com/6u4p9 |
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Mike Gilmour
Guest
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| Posted:
Tue Jan 18, 2005 2:42 pm Post subject:
Re: Is this an FM aerial? Where did it come from? |
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"Neil" <nobody@nospam.net> wrote in message
news:cshhuj$ni5$1$8300dec7@news.demon.co.uk...
| Quote: | I used to own a Galaxie 17, later upgraded to a 23. Unless Ron Smith has
re-designed these since 1997, I must say their performance above 104 MHz is
for one of a better word 'sh*te'. Granted, when he designed them the FM
band only extended to 105 MHz but these days the 105-108 sub-band is
heavily populated with stations and the performance is pretty poor with a
4-6dB roll off between 104 and 106 MHz.
|
The centre frequency of most of the models is 93.0 MHz but if you wanted
good performance above 104 MHz then maybe a GTE model may have suited you
better whose centre frequency is 102 MHz, available on the 17, 20 & 23
models.
Mike |
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tony sayer
Guest
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| Posted:
Tue Jan 18, 2005 3:30 pm Post subject:
Re: Is this an FM aerial? Where did it come from? |
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In article <csifsi$9u2$1@newsg4.svr.pol.co.uk>, Malcolm Stewart
<malcolm_stewart@megalith.freeserve.co.uk> writes
| Quote: | "informer" <no.spam@talk21.com> wrote in message
news:csib4k$m4u$1@hercules.btinternet.com...
"Marky P" <bromham_hospital_band@yahoo.co.uk> wrote
How much are they?
When I bought my G26 back in 1991, the price was £180. And that was
just the aerial. They came & put it up on a 20 foot mast with a
rotator.
Marky P.
With free digital radio on sky do we need these sort of aerials now apart
from picking up the local BBC station?
I thought "Sky" had some form of entrance fee. Let me know if I'm wrong,
and how I can enjoy satellite carried "free" programmes without contributing
to BSB or similar.
|
A standard digital satellite receiver, not a sky box, will bring all
that is unencrypted on the "Sky" or rather ASTRA system.
Have a look through this list and you can see what's clear and what's
not.
http://www.lyngsat.com/28east.html
and from across the channel;)
http://www.lyngsat.com/astra19.html
and
http://www.lyngsat.com/hotbird.html
the channels with a beige coloured background are the free to
view/listen ones.
A standard digital sat receiver can be had for less that 100 quid and a
dish and LNB aren't that expensive either...
--
Tony Sayer |
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DAB sounds worse than FM
Guest
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tony sayer
Guest
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| Posted:
Tue Jan 18, 2005 3:56 pm Post subject:
Re: Is this an FM aerial? Where did it come from? |
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In article <dqSdnejJyJ-ZR3HcRVn-sw@nildram.net>, Mike Gilmour
<mike@tfjazz.freeserve.co.uk> writes
| Quote: |
"Neil" <nobody@nospam.net> wrote in message
news:cshhuj$ni5$1$8300dec7@news.demon.co.uk...
I used to own a Galaxie 17, later upgraded to a 23. Unless Ron Smith has
re-designed these since 1997, I must say their performance above 104 MHz is
for one of a better word 'sh*te'. Granted, when he designed them the FM
band only extended to 105 MHz but these days the 105-108 sub-band is
heavily populated with stations and the performance is pretty poor with a
4-6dB roll off between 104 and 106 MHz.
The centre frequency of most of the models is 93.0 MHz but if you wanted
good performance above 104 MHz then maybe a GTE model may have suited you
better whose centre frequency is 102 MHz, available on the 17, 20 & 23
models.
Mike
As much as anyone would like to try the multi element Yagi array is a |
fairly narrowband device, and I don't know of anyone who's successfully
changed that without substantially reducing the gain.
So no surprise really....
--
Tony Sayer |
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DAB sounds worse than FM
Guest
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davidrobinson@postmaster.
Guest
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| Posted:
Tue Jan 18, 2005 4:13 pm Post subject:
Re: Is this an FM aerial? Where did it come from? |
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Mike Gilmour wrote:
| Quote: | Nah, details were written down on the back of an old envelope after
I
phoned Ron and I'd filed it with his bill. Had this aerial for about
15
years on a chimney clamped 4m pole and its stood up to gales so far..
|
Thanks for all the interesting and informative replies - especially
Mike's which hit Google 30 minutes after I'd posted the original
question!
I've visited Ron's website and ordered the catalogue.
It's interesting that two people suggest a normal dipole or yagi may be
better. If I just need a dipole or very small yagi, then I might just
dare to attack our brick work (though I'm not going up the chimney, or
sending anyone else up there). It's a difficult choice: simple outdoor
aerial (at loft height) or better aerial in the loft itself. Obviously
it's easier to put something in the loft, but if that something costs
more and does less, it's a waste of time. (See also the Bow Brickhill
thread in uk.tech.broadcast for other issues!).
I guess I'll just have to bite the bullet and try!
Cheers,
David. |
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Richard L
Guest
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| Posted:
Tue Jan 18, 2005 5:16 pm Post subject:
Re: Is this an FM aerial? Where did it come from? |
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In message <3542eiF4c3jd3U2@individual.net>
Mark Carver <markcarver@onetel.com> wrote:
| Quote: | Malcolm Stewart wrote:
I thought "Sky" had some form of entrance fee. Let me know if I'm wrong,
and how I can enjoy satellite carried "free" programmes without contributing
to BSB or similar.
Almost every radio station on Sky's platform is unencrypted. Therefore
you can simply purchase a second hand Sky box on EBay, stick up a dish,
and away you go. Better still, get any non Sky satellite receiver and
use that instead, or get a DVB-S card for your PC and receive that way.
|
Non-Sky satellite receivers are readily available in the UK from
specialist dealers -- including online ones, of course. But in
addition to the UK radio services, there's a vast choice of
satellite services from stations all over Europe and beyond. If
you want to explore these, Malcolm, you're better off with
something other than a Sky box -- Sky's receivers can't really
handle more than the one satellite.
--
Richard L. |
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DAB sounds worse than FM
Guest
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tony sayer
Guest
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| Posted:
Tue Jan 18, 2005 5:42 pm Post subject:
Re: Is this an FM aerial? Where did it come from? |
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In article <1106046808.029145.32160@f14g2000cwb.googlegroups.com>,
davidrobinson@postmaster.co.uk <davidrobinson@postmaster.co.uk> writes
| Quote: | Mike Gilmour wrote:
Nah, details were written down on the back of an old envelope after
I
phoned Ron and I'd filed it with his bill. Had this aerial for about
15
years on a chimney clamped 4m pole and its stood up to gales so far..
Thanks for all the interesting and informative replies - especially
Mike's which hit Google 30 minutes after I'd posted the original
question!
I've visited Ron's website and ordered the catalogue.
It's interesting that two people suggest a normal dipole or yagi may be
better. If I just need a dipole or very small yagi, then I might just
dare to attack our brick work (though I'm not going up the chimney, or
sending anyone else up there). It's a difficult choice: simple outdoor
aerial (at loft height) or better aerial in the loft itself. Obviously
it's easier to put something in the loft, but if that something costs
more and does less, it's a waste of time. (See also the Bow Brickhill
thread in uk.tech.broadcast for other issues!).
I guess I'll just have to bite the bullet and try!
|
David, Stop being a wuss and get up 'thar on either that chimney or wall
and hang on there something like a 4 element TRIAX available from
www.cpc.co.uk.
If your wall and or chimney is capable of even standing then either
would support such an aerial. It would work for what you want it to do
much better then either one of Rons big jobs or faffing around with
aerials in the loft.
If you can't do it then get a half decent aerial rigger in to do it.
Make sure he uses CT100 don't be fobbed off with anything less and don't
rely on him to provide the aerial either, as it'll be a cheapie contract
jobbie and whatEVER you do don't be tempted into one of those HALO
pieces of crap.
Then sit back and enjoy the radio for several years to come. Write off
the money on your well installed unit over say 10 years and then see
what good value for money that really is:))
--
Tony Sayer |
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Arthur
Guest
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| Posted:
Tue Jan 18, 2005 6:15 pm Post subject:
Re: Is this an FM aerial? Where did it come from? |
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On Tue, 18 Jan 2005 12:42:57 +0000, tony sayer <tony@bancom.co.uk> wrote:
| Quote: | It's interesting that two people suggest a normal dipole or yagi may be
better. If I just need a dipole or very small yagi, then I might just
dare to attack our brick work (though I'm not going up the chimney, or
sending anyone else up there). It's a difficult choice: simple outdoor
aerial (at loft height) or better aerial in the loft itself. Obviously
it's easier to put something in the loft, but if that something costs
more and does less, it's a waste of time. (See also the Bow Brickhill
thread in uk.tech.broadcast for other issues!).
I guess I'll just have to bite the bullet and try!
David, Stop being a wuss and get up 'thar on either that chimney or wall
and hang on there something like a 4 element TRIAX available from
www.cpc.co.uk.
|
David, if you are getting satisfactory reception from your dipole, why do
you want to put up a huge, heavy and expensive multi-element array?
Your nearest BBC FM radio site is only 20km away and is designed to give
satisfactory reception on a portable or mobile receiver in your area, so
your rooftop dipole is more than adequate. The main independent radio
channels also provide a normal service in your area.
If you are interested for some reason in receiving distant stations
outside their service areas then you will need a high-gain aerial, but you
will then probably also need a rotator to drive it.
Is this what you *really* need?
Arthur |
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Richard Fry
Guest
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| Posted:
Tue Jan 18, 2005 6:53 pm Post subject:
Re: Is this an FM aerial? Where did it come from? |
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"tony sayer" <tony@bancom.co.uk> wrote
| Quote: | Thats one of Ron Smiths circular polarised jobbies.
____________________ |
Although one structural shape in the aerial is roughly circular, this aerial
is linearly polarised.
An aerial element in the form of a small loop* is not circularly polarised;
it is linearly polarised with its peak gain in the two directions normal to
the plane of the loop (see Kraus, 3rd Edition, table 6-2). The presence of
the parasitic elements in this array -- all in the same plane -- will
remove some of the ambiguity from the pattern of the loop, and increase the
peak gain of the array.
Of course, the polarisation plane of the array will be the same as the
physical orientation in which its elements are mounted. But it will be
linearly polarised, not circularly polarised.
Other designs are needed for true circular polarisation, some of which can
be seen in the papers at the website linked below.
*where loop circumference is ~ one wavelength
RF
Visit http://rfry.org for FM transmission system papers. |
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tony sayer
Guest
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| Posted:
Tue Jan 18, 2005 7:14 pm Post subject:
Re: Is this an FM aerial? Where did it come from? |
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In article <opsksu3a1cilotte@home2.mshome.net>, Arthur
<Arthur@nospam.com> writes
| Quote: | On Tue, 18 Jan 2005 12:42:57 +0000, tony sayer <tony@bancom.co.uk> wrote:
It's interesting that two people suggest a normal dipole or yagi may be
better. If I just need a dipole or very small yagi, then I might just
dare to attack our brick work (though I'm not going up the chimney, or
sending anyone else up there). It's a difficult choice: simple outdoor
aerial (at loft height) or better aerial in the loft itself. Obviously
it's easier to put something in the loft, but if that something costs
more and does less, it's a waste of time. (See also the Bow Brickhill
thread in uk.tech.broadcast for other issues!).
I guess I'll just have to bite the bullet and try!
David, Stop being a wuss and get up 'thar on either that chimney or wall
and hang on there something like a 4 element TRIAX available from
www.cpc.co.uk.
David, if you are getting satisfactory reception from your dipole, why do
you want to put up a huge, heavy and expensive multi-element array?
Your nearest BBC FM radio site is only 20km away and is designed to give
satisfactory reception on a portable or mobile receiver in your area, so
your rooftop dipole is more than adequate. The main independent radio
channels also provide a normal service in your area.
If you are interested for some reason in receiving distant stations
outside their service areas then you will need a high-gain aerial, but you
will then probably also need a rotator to drive it.
Is this what you *really* need?
|
What he really needs is an outside aerial up in the clear, and one that
has some element of directivity and gain, so that his tuner is receiving
a clean feed free from reflections, which unlike ghosting on an analogue
TV aren't so apparent on FM, but they do affect the received audio.
Preferably a bit more gain so that under lift conditions etc he will
have some measure of discrimination against interferer signals and for
the times when you local TX might go on low power, or fall over and be
seemingly on reduced power from here to god knows when!, so all in all
not a too demanding requirement.
Course, if you feel you need one of Ron S's jobbies, on your head be it
especially if that wall's as bad as he reckons.
--
Tony Sayer |
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