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DAB aerial
I've just bought a replacement radio alarm clock with DAB radio. The
radio will pick up an adequate signal in one location but not where it needs to be. Is there anything I can do to improve matters? The aerial is a thin wire permanently fixed into the back of the unit. -- F |
DAB aerial
"F" news@nowhere wrote in message ... I've just bought a replacement radio alarm clock with DAB radio. The radio will pick up an adequate signal in one location but not where it needs to be. Is there anything I can do to improve matters? The aerial is a thin wire permanently fixed into the back of the unit. attach a longer wire to that wire....... |
DAB aerial
F news@nowhere wrote:
I've just bought a replacement radio alarm clock with DAB radio. The radio will pick up an adequate signal in one location but not where it needs to be. Is there anything I can do to improve matters? The aerial is a thin wire permanently fixed into the back of the unit. Yes, get an FM radio or an internet radio! :-) -- Chris Green · |
DAB aerial
Oh one of those eh, common in things with Bush fidelity and goodmans names
on. How long is the wire? Obviously not a lot you can do if you don't want to open up the unit. Brian -- ----- - This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... Blind user, so no pictures please! "F" news@nowhere wrote in message ... I've just bought a replacement radio alarm clock with DAB radio. The radio will pick up an adequate signal in one location but not where it needs to be. Is there anything I can do to improve matters? The aerial is a thin wire permanently fixed into the back of the unit. -- F |
DAB aerial
In article ,
Chris Green wrote: F news@nowhere wrote: I've just bought a replacement radio alarm clock with DAB radio. The radio will pick up an adequate signal in one location but not where it needs to be. Is there anything I can do to improve matters? The aerial is a thin wire permanently fixed into the back of the unit. Yes, get an FM radio or an internet radio! :-) Can you guarantee perfect reception on FM with a bit of wire for an aerial? No? Not much point in that comment, then. And can you guarantee perfect internet too all the time? i-player etc is generally pretty good here. But not all the time. -- *Middle age is when it takes longer to rest than to get tired. Dave Plowman London SW To e-mail, change noise into sound. |
DAB aerial
It may work but the fact that its got just a bit of wire means its meant for
strong signal areas and one would hope it has the sensitivity to work. However if you are getting boiling mud noises than either your signal is rubbish or the set is. If you could open it up and ge inside you might be able to attach a bit of coax to the airial input and the earth to a local earth inside. Then you could terminate it in a socket and use an outside dab aerial. However this might... 1. be making the warrenty invalid or allowing an inadaquately insulated bit of metal to be touched outside the box or Just be impossible to do as the aeriel input is not meant for a real aerial. Incidentally if you attach a cloths peg to the wire and stretch it up as it would be if it was a telescopic one does it then work? If so then there is the answer. Brian -- ----- - This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... Blind user, so no pictures please! "Jim GM4DHJ ..." wrote in message ... "F" news@nowhere wrote in message ... I've just bought a replacement radio alarm clock with DAB radio. The radio will pick up an adequate signal in one location but not where it needs to be. Is there anything I can do to improve matters? The aerial is a thin wire permanently fixed into the back of the unit. attach a longer wire to that wire....... |
DAB aerial
On 30/11/2017 12:56, F wrote:
I've just bought a replacement radio alarm clock with DAB radio. The radio will pick up an adequate signal in one location but not where it needs to be. Is there anything I can do to improve matters? The aerial is a thin wire permanently fixed into the back of the unit. Cut the wire aerial short. Connect the coaxial inner of the cable from an outdoor aerial to it. Leave the coaxial screen unconnected. It will transfer enough signal to work, despite the inefficiency. Bill |
DAB aerial
In article ,
Bill Wright wrote: On 30/11/2017 12:56, F wrote: I've just bought a replacement radio alarm clock with DAB radio. The radio will pick up an adequate signal in one location but not where it needs to be. Is there anything I can do to improve matters? The aerial is a thin wire permanently fixed into the back of the unit. Cut the wire aerial short. Connect the coaxial inner of the cable from an outdoor aerial to it. Leave the coaxial screen unconnected. It will transfer enough signal to work, despite the inefficiency. Often wondered if there was a good way to connect an outside aerial to these 'bit of wire' ones. -- *OK, so what's the speed of dark? * Dave Plowman London SW To e-mail, change noise into sound. |
DAB aerial
"Dave Plowman (News)" wrote:
In article , Chris Green wrote: F news@nowhere wrote: I've just bought a replacement radio alarm clock with DAB radio. The radio will pick up an adequate signal in one location but not where it needs to be. Is there anything I can do to improve matters? The aerial is a thin wire permanently fixed into the back of the unit. Yes, get an FM radio or an internet radio! :-) Can you guarantee perfect reception on FM with a bit of wire for an aerial? No? Not much point in that comment, then. No, but there's a much better chance than with DAB in my experience. .... and I did put a :-) And can you guarantee perfect internet too all the time? I've never had any issues with my internet radios, even when we had fairly slow (2 to 4Mb/s) ADSL. -- Chris Green · |
DAB aerial
"Dave Plowman (News)" wrote in message ... In article , Bill Wright wrote: On 30/11/2017 12:56, F wrote: I've just bought a replacement radio alarm clock with DAB radio. The radio will pick up an adequate signal in one location but not where it needs to be. Is there anything I can do to improve matters? The aerial is a thin wire permanently fixed into the back of the unit. Cut the wire aerial short. Connect the coaxial inner of the cable from an outdoor aerial to it. Leave the coaxial screen unconnected. It will transfer enough signal to work, despite the inefficiency. Often wondered if there was a good way to connect an outside aerial to these 'bit of wire' ones. I always categorised ones with a bit of wire as being junk ...... |
DAB aerial
On 30/11/17 12:56, F wrote:
I've just bought a replacement radio alarm clock with DAB radio. The radio will pick up an adequate signal in one location but not where it needs to be. Is there anything I can do to improve matters? The aerial is a thin wire permanently fixed into the back of the unit. You can try moving the wire around. We had a similar issue initially and found just a small change made a big difference- as did closing the wardrobe doors (which are mirrored). I assume they upgraded the transmitter as it seems far less sensitive to the position of the wire now. If you are in a poor signal area, then you may need an external antenna- which (ideally) means a proper connector on the radio. Those on DAB radios tend to be F type- as used on satellite boxes. However, you MAY get away with just linking the inner of the coax to the existing wire. I theory it is 'bad news' but you'd be surprised what rules can be 'bent' when it comes to such things- remember the fashion for coat hangers as car aerials ;-) |
DAB aerial
On 30/11/2017 16:48, Brian Reay wrote:
On 30/11/17 12:56, F wrote: I've just bought a replacement radio alarm clock with DAB radio. The radio will pick up an adequate signal in one location but not where it needs to be. Is there anything I can do to improve matters? The aerial is a thin wire permanently fixed into the back of the unit. You can try moving the wire around. We had a similar issue initially and found just a small change made a big difference- as did closing the wardrobe doors (which are mirrored). Thanks. Tried that, and the wardrobe doors are closed. As you say, the slightest move... -- F |
DAB aerial
"Brian Reay" wrote in message ... On 30/11/17 12:56, F wrote: I've just bought a replacement radio alarm clock with DAB radio. The radio will pick up an adequate signal in one location but not where it needs to be. Is there anything I can do to improve matters? The aerial is a thin wire permanently fixed into the back of the unit. You can try moving the wire around. We had a similar issue initially and found just a small change made a big difference- as did closing the wardrobe doors (which are mirrored). I assume they upgraded the transmitter as it seems far less sensitive to the position of the wire now. If you are in a poor signal area, then you may need an external antenna- which (ideally) means a proper connector on the radio. Those on DAB radios tend to be F type- as used on satellite boxes. However, you MAY get away with just linking the inner of the coax to the existing wire. I theory it is 'bad news' but you'd be surprised what rules can be 'bent' when it comes to such things- remember the fashion for coat hangers as car aerials ;-) is that after the naughty boys break them ? ..... |
DAB aerial
On 30/11/2017 17:11, pamela wrote:
http://support-uk.pure.com/en/kb/art...l-lengths-for- dab-fm Schoolboy error. What about velocity factor? How do we know this quarter wave will be connected to something that matches its theoretical 50ohm impedance? Anyway, even a perfectly resonant and matched length of wire will only collect signal that exists, and it will not produce a better signal to local noise ratio than a random length. Bill |
DAB aerial
On 30/11/2017 15:25, Dave Plowman (News) wrote:
In article , Bill Wright wrote: On 30/11/2017 12:56, F wrote: I've just bought a replacement radio alarm clock with DAB radio. The radio will pick up an adequate signal in one location but not where it needs to be. Is there anything I can do to improve matters? The aerial is a thin wire permanently fixed into the back of the unit. Cut the wire aerial short. Connect the coaxial inner of the cable from an outdoor aerial to it. Leave the coaxial screen unconnected. It will transfer enough signal to work, despite the inefficiency. Often wondered if there was a good way to connect an outside aerial to these 'bit of wire' ones. It's worth experimenting by connecting the screen to anything you can find to connect it to. Bill |
DAB aerial
On 30/11/2017 14:32, Dave Plowman (News) wrote:
Can you guarantee perfect reception on FM with a bit of wire for an aerial? No? Not much point in that comment, then. My 25-yo Roberts clock radio alarm is fine on FM with the bit of wire, about 3 feet long, dangling down to the floor and I live at least 50 miles from Rowbridge. |
DAB aerial
On Thu, 30 Nov 2017 17:11:17 +0000
F news@nowhere wrote: On 30/11/2017 16:48, Brian Reay wrote: On 30/11/17 12:56, F wrote: I've just bought a replacement radio alarm clock with DAB radio. The radio will pick up an adequate signal in one location but not where it needs to be. Is there anything I can do to improve matters? The aerial is a thin wire permanently fixed into the back of the unit. You can try moving the wire around. We had a similar issue initially and found just a small change made a big difference- as did closing the wardrobe doors (which are mirrored). Thanks. Tried that, and the wardrobe doors are closed. As you say, the slightest move... Memories of rabbit ears and TV sets. -- Davey. |
DAB aerial
In article , pamela
scribeth thus On 20:27 30 Nov 2017, Bill Wright wrote: On 30/11/2017 17:11, pamela wrote: http://support-uk.pure.com/en/kb/art...aerial-lengths -for- dab-fm Schoolboy error. What about velocity factor? How do we know this quarter wave will be connected to something that matches its theoretical 50ohm impedance? Anyway, even a perfectly resonant and matched length of wire will only collect signal that exists, and it will not produce a better signal to local noise ratio than a random length. Bill So those naughty boys are Pure are misleading us. A bit more Googling shows that DAB Digital Radio magazine once suggested 31.5 cm which doesn't match the 53 to 86cm suggested by Pure. "the perfect length for a DAB digital radio aerial is 31.5 cm (based on the frequency used to broadcast the national commercial digital radio stations)" Now I am extra confused. By the way, wouldn't a resonant aerial produce a greater signal for the same level of background noise and therefore improve the S/N? Well in principal yes. The DAB band is now quite wide frequencies from 174 to 239 odd as per; http://www.wohnort.org/dab/freqs.html are getting used, so for a simple plain old vertical whip mounted on a ground plane thats say from 300/174 divide 4 x.9 velocity factor say 387 mm to 281 mm. Not a very wide band device so cut to resonance is a good idea. However a folded dipole much better, in fact we have a now unused dipole that used to carry network rails band 3 service on 206 MHz it's now carrying a 163 MHz channel with no reflected power!. -- Tony Sayer |
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