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aus+uk / uk.d-i-y / FM-Dab aerial converter

SubjectAuthor
* FM-Dab aerial converterRJH
+* Re: FM-Dab aerial converterBrian
|`- Re: FM-Dab aerial converterRJH
+* Re: FM-Dab aerial converterDave Plowman (News)
|+- Re: FM-Dab aerial converterbert
|`- Re: FM-Dab aerial converterRJH
+* Re: FM-Dab aerial converterwilliamwright
|`* Re: FM-Dab aerial converterRJH
| +* Re: FM-Dab aerial converterwilliamwright
| |`* Re: FM-Dab aerial convertercharles
| | `- Re: FM-Dab aerial converterwilliamwright
| +* Re: FM-Dab aerial converterTim Streater
| |+* Re: FM-Dab aerial convertercharles
| ||+- Re: FM-Dab aerial converterAndrew
| ||+* Re: FM-Dab aerial converterDave Plowman (News)
| |||`* Re: FM-Dab aerial convertercharles
| ||| `* Re: FM-Dab aerial converterDave Plowman (News)
| |||  `* Re: FM-Dab aerial convertercharles
| |||   `- Re: FM-Dab aerial converterwilliamwright
| ||`* Re: FM-Dab aerial converterMartin Brown
| || +- Re: FM-Dab aerial converterwilliamwright
| || +* Re: FM-Dab aerial converterMark Carver
| || |`* Re: FM-Dab aerial converterAndrew
| || | `- Re: FM-Dab aerial converterMark Carver
| || `- Re: FM-Dab aerial converterAndrew
| |+* Re: FM-Dab aerial converterRJH
| ||+* Re: FM-Dab aerial converterTim Streater
| |||+* Re: FM-Dab aerial converterJock
| ||||+- Re: FM-Dab aerial converterTim Streater
| ||||`* Re: FM-Dab aerial converterMartin Brown
| |||| `- Re: FM-Dab aerial converterJock
| |||+- Re: FM-Dab aerial converterwilliamwright
| |||+* Re: FM-Dab aerial converterwilliamwright
| ||||`* Re: FM-Dab aerial converterRod Speed
| |||| `* Re: FM-Dab aerial converterwilliamwright
| ||||  `* Re: FM-Dab aerial converterRod Speed
| ||||   `* Re: FM-Dab aerial converterwilliamwright
| ||||    `* Re: FM-Dab aerial converterRod Speed
| ||||     `* Re: FM-Dab aerial converterwilliamwright
| ||||      `- Re: FM-Dab aerial converterRod Speed
| |||`- Re: FM-Dab aerial converterRJH
| ||`* Re: FM-Dab aerial converterwilliamwright
| || `* Re: FM-Dab aerial converterRJH
| ||  `- Re: FM-Dab aerial converterwilliamwright
| |+* Re: FM-Dab aerial converterThe Natural Philosopher
| ||+* Re: FM-Dab aerial converterTim Streater
| |||`* Re: FM-Dab aerial converterwilliamwright
| ||| +* Re: FM-Dab aerial converterTim Streater
| ||| |`- Re: FM-Dab aerial converterwilliamwright
| ||| `* Re: FM-Dab aerial converterMark Carver
| |||  `- Re: FM-Dab aerial converterwilliamwright
| ||`- Re: FM-Dab aerial converterwilliamwright
| |`* Re: FM-Dab aerial converterRJH
| | +* Re: FM-Dab aerial converterThe Natural Philosopher
| | |+* Re: FM-Dab aerial converterRJH
| | ||+- Re: FM-Dab aerial converterDave Plowman (News)
| | ||`* Re: FM-Dab aerial converterwilliamwright
| | || `* Re: FM-Dab aerial convertercharles
| | ||  +* Re: FM-Dab aerial converterDave Plowman (News)
| | ||  |`- Re: FM-Dab aerial convertercharles
| | ||  `- Re: FM-Dab aerial converterwilliamwright
| | |`* Re: FM-Dab aerial converterwilliamwright
| | | `- Re: FM-Dab aerial converterPaul
| | `- Re: FM-Dab aerial converterwilliamwright
| `* Re: FM-Dab aerial converterDave Plowman (News)
|  `- Re: FM-Dab aerial converterRJH
`* Re: FM-Dab aerial converterRJH
 `* Re: FM-Dab aerial converterMartin Brown
  +- Re: FM-Dab aerial converterRJH
  +- Re: FM-Dab aerial converterwilliamwright
  +- Re: FM-Dab aerial converterwilliamwright
  `- Re: FM-Dab aerial converterDave Plowman (News)

Pages:123
FM-Dab aerial converter

<t4qkge$t1f$1@dont-email.me>

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https://www.novabbs.com/aus+uk/article-flat.php?id=51140&group=uk.d-i-y#51140

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Path: i2pn2.org!i2pn.org!eternal-september.org!reader02.eternal-september.org!.POSTED!not-for-mail
From: patchmo...@gmx.com (RJH)
Newsgroups: uk.d-i-y
Subject: FM-Dab aerial converter
Date: Tue, 3 May 2022 07:10:06 -0000 (UTC)
Organization: A noiseless patient Spider
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 by: RJH - Tue, 3 May 2022 07:10 UTC

Anybody had any success with one of these? -

https://www.aliexpress.com/item/1005002430541537.html

'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal Amplifier
Radio Antenna Aerial for Car Radio'
--
Cheers, Rob

Re: FM-Dab aerial converter

<t4qnej$i6c$1@dont-email.me>

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From: noi...@lid.org (Brian)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: Tue, 3 May 2022 08:00:19 -0000 (UTC)
Organization: A noiseless patient Spider
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 by: Brian - Tue, 3 May 2022 08:00 UTC

RJH <patchmoney@gmx.com> wrote:
> Anybody had any success with one of these? -
>
> https://www.aliexpress.com/item/1005002430541537.html
>
> 'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal Amplifier
> Radio Antenna Aerial for Car Radio'

Not directly.

You may need an adaptor plug / lead between it and your radio for the DAB
connector- they vary.

I have something similar fitted ( as standard) in our motorhome - I assume
it is tucked away either in the roof or behind the dashboard. There is a
short, perhaps 12 to 15 inch if that, antenna on the (composite) roof. The
reception is good - I nearly always use DAB, fall back to FM if no DAB
coverage.

One thing to watch.

I have a Kenwood Stereo. It has the ability to feed power to the antenna
via the coax. It does this by default. With amplified antennas (including
mine) this causes a conflict. When first powering up / resetting the radio,
you need to go into settings and turn off the option to feed power to the
antenna. BUT, you can’t access the menu if it detects the conflict, you
must disconnect the antenna, make the change, then reconnect it. After that
it is fine, provided the backup power to the radio is maintained. I’ve
mentioned this to others and it seems Kenwood aren’t unique.

Re: FM-Dab aerial converter

<59e2d123e4dave@davenoise.co.uk>

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From: dav...@davenoise.co.uk (Dave Plowman (News))
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: Tue, 03 May 2022 14:47:43 +0100
Organization: None
Message-ID: <59e2d123e4dave@davenoise.co.uk>
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 by: Dave Plowman (News) - Tue, 3 May 2022 13:47 UTC

In article <t4qkge$t1f$1@dont-email.me>,
RJH <patchmoney@gmx.com> wrote:
> Anybody had any success with one of these? -

> https://www.aliexpress.com/item/1005002430541537.html

> 'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal Amplifier
> Radio Antenna Aerial for Car Radio'

Didn't work here. I bought a car DAB radio ages ago - and the original
aerial was a wing mounted telescopic type. Fine on AM and FM. The radio
came with a stick on DAB windscreen aerial - which also didn't work well
and looked hideous.

Ended up buying and fitting a roof aerial designed for all of them. That
does work very well, but cost as much as some head units. It has separate
amps and feeders for DAB and FM/AM.

--
*Work is for people who don't know how to fish.

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.

Re: FM-Dab aerial converter

<cn6ic5BgbXciFAyP@ghcq.uk>

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From: ber...@bert.bert.com (bert)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: Tue, 3 May 2022 19:39:28 +0100
Organization: A noiseless patient Spider
Lines: 26
Message-ID: <cn6ic5BgbXciFAyP@ghcq.uk>
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 by: bert - Tue, 3 May 2022 18:39 UTC

In article <59e2d123e4dave@davenoise.co.uk>, "Dave Plowman (News)"
<dave@davenoise.co.uk> writes
>In article <t4qkge$t1f$1@dont-email.me>,
> RJH <patchmoney@gmx.com> wrote:
>> Anybody had any success with one of these? -
>
>> https://www.aliexpress.com/item/1005002430541537.html
>
>> 'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal Amplifier
>> Radio Antenna Aerial for Car Radio'
>
>Didn't work here. I bought a car DAB radio ages ago - and the original
>aerial was a wing mounted telescopic type. Fine on AM and FM. The radio
>came with a stick on DAB windscreen aerial - which also didn't work well
>and looked hideous.
>
I had similar arrangement on my Defender. Worked OK, but I did improve
the earth connection on the DAB aerial with some stick on copper tape.
The aerial barely noticeable on the windscreen.
>Ended up buying and fitting a roof aerial designed for all of them. That
>does work very well, but cost as much as some head units. It has separate
>amps and feeders for DAB and FM/AM.
>

--
bert

Re: FM-Dab aerial converter

<jddfa7FeuklU4@mid.individual.net>

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From: wrightsa...@f2s.com (williamwright)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: Tue, 3 May 2022 20:49:28 +0100
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In-Reply-To: <t4qkge$t1f$1@dont-email.me>
 by: williamwright - Tue, 3 May 2022 19:49 UTC

On 03/05/2022 08:10, RJH wrote:
> Anybody had any success with one of these? -
>
> https://www.aliexpress.com/item/1005002430541537.html
>
> 'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal Amplifier
> Radio Antenna Aerial for Car Radio'

It's just an amplifier. Unless your receiver is very insensitive I can't
see how it would help. In fact in strong signal areas it's likely to
overload the radio's front end.

Bill

Re: FM-Dab aerial converter

<t518t4$jkk$1@dont-email.me>

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From: patchmo...@gmx.com (RJH)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: Thu, 5 May 2022 19:35:00 -0000 (UTC)
Organization: A noiseless patient Spider
Lines: 38
Message-ID: <t518t4$jkk$1@dont-email.me>
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 by: RJH - Thu, 5 May 2022 19:35 UTC

On 3 May 2022 at 09:00:19 BST, "Brian" <noinv@lid.org> wrote:

> RJH <patchmoney@gmx.com> wrote:
>> Anybody had any success with one of these? -
>>
>> https://www.aliexpress.com/item/1005002430541537.html
>>
>> 'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal Amplifier
>> Radio Antenna Aerial for Car Radio'
>
>
> Not directly.
>
> You may need an adaptor plug / lead between it and your radio for the DAB
> connector- they vary.
>
> I have something similar fitted ( as standard) in our motorhome - I assume
> it is tucked away either in the roof or behind the dashboard. There is a
> short, perhaps 12 to 15 inch if that, antenna on the (composite) roof. The
> reception is good - I nearly always use DAB, fall back to FM if no DAB
> coverage.
>
> One thing to watch.
>
> I have a Kenwood Stereo. It has the ability to feed power to the antenna
> via the coax. It does this by default. With amplified antennas (including
> mine) this causes a conflict. When first powering up / resetting the radio,
> you need to go into settings and turn off the option to feed power to the
> antenna. BUT, you can’t access the menu if it detects the conflict, you
> must disconnect the antenna, make the change, then reconnect it. After that
> it is fine, provided the backup power to the radio is maintained. I’ve
> mentioned this to others and it seems Kenwood aren’t unique.

Good to know, thanks.

--
Cheers, Rob

Re: FM-Dab aerial converter

<t518v3$k6p$1@dont-email.me>

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From: patchmo...@gmx.com (RJH)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: Thu, 5 May 2022 19:36:03 -0000 (UTC)
Organization: A noiseless patient Spider
Lines: 27
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 by: RJH - Thu, 5 May 2022 19:36 UTC

On 3 May 2022 at 14:47:43 BST, ""Dave Plowman" <News)" <dave@davenoise.co.uk>
wrote:

> In article <t4qkge$t1f$1@dont-email.me>,
> RJH <patchmoney@gmx.com> wrote:
>> Anybody had any success with one of these? -
>
>> https://www.aliexpress.com/item/1005002430541537.html
>
>> 'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal Amplifier
>> Radio Antenna Aerial for Car Radio'
>
> Didn't work here. I bought a car DAB radio ages ago - and the original
> aerial was a wing mounted telescopic type. Fine on AM and FM. The radio
> came with a stick on DAB windscreen aerial - which also didn't work well
> and looked hideous.
>

I'd like to think it'd work, but agreed on the look. Could do without that.

> Ended up buying and fitting a roof aerial designed for all of them. That
> does work very well, but cost as much as some head units. It has separate
> amps and feeders for DAB and FM/AM.

Which I'm obviously hoping to avoid.
--
Cheers, Rob

Re: FM-Dab aerial converter

<t51963$ln6$1@dont-email.me>

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From: patchmo...@gmx.com (RJH)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: Thu, 5 May 2022 19:39:47 -0000 (UTC)
Organization: A noiseless patient Spider
Lines: 28
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 by: RJH - Thu, 5 May 2022 19:39 UTC

On 3 May 2022 at 20:49:28 BST, "williamwright" <wrightsaerials@f2s.com> wrote:

> On 03/05/2022 08:10, RJH wrote:
>> Anybody had any success with one of these? -
>>
>> https://www.aliexpress.com/item/1005002430541537.html
>>
>> 'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal Amplifier
>> Radio Antenna Aerial for Car Radio'
>
> It's just an amplifier.

Is it though? Does any sort of filtering or stuff happen to make it suitable
for DAB?

It does seem odd to me that existing FM aerials can't be used, given all of my
DAB portables seem to work with either a dangling wire or unextended
telescopic aerial.

> Unless your receiver is very insensitive I can't
> see how it would help. In fact in strong signal areas it's likely to
> overload the radio's front end.
>

Mmm, OK noted, thanks.

--
Cheers, Rob

Re: FM-Dab aerial converter

<jdj9cjFibu0U1@mid.individual.net>

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From: wrightsa...@f2s.com (williamwright)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: Fri, 6 May 2022 01:45:07 +0100
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 by: williamwright - Fri, 6 May 2022 00:45 UTC

On 05/05/2022 20:39, RJH wrote:

> Is it though? Does any sort of filtering or stuff happen to make it suitable
> for DAB?

Filters can only remove signals, not add them. No, it's a wideband
amplifier, nothing more than that. It probably has a worse noise figure
than the tuner in your radio.

Anything RF is a playground for every kind of shark and con man. It's
been the same since the days of the crystal set. Radio waves are
mysterious and invisible, so the successors of the Victorian mediums
find them their natural hunting ground.

When I was a child in the 1950s there was a man who used to stand in the
marketplace selling miracle TV aerials. They comprised a coax plug with
six feet of wire attached. At the end of the wire was a large army
surplus electrolytic capacitor. The price was 5/-. "Take it home and try
it. If you aren't completely satisfied bring it back next week for a
full refund." But he only attended the market occasionally, probably
once every couple on months.

Bill

Re: FM-Dab aerial converter

<59e4404d2bcharles@candehope.me.uk>

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NNTP-Posting-Date: Fri, 06 May 2022 03:49:22 -0500
From: char...@candehope.me.uk (charles)
Subject: Re: FM-Dab aerial converter
Newsgroups: uk.d-i-y
Date: Fri, 06 May 2022 09:38:08 +0100
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 by: charles - Fri, 6 May 2022 08:38 UTC

In article <jdj9cjFibu0U1@mid.individual.net>,
williamwright <wrightsaerials@f2s.com> wrote:
> On 05/05/2022 20:39, RJH wrote:

> > Is it though? Does any sort of filtering or stuff happen to make it suitable
> > for DAB?

> Filters can only remove signals, not add them. No, it's a wideband
> amplifier, nothing more than that. It probably has a worse noise figure
> than the tuner in your radio.

> Anything RF is a playground for every kind of shark and con man. It's
> been the same since the days of the crystal set. Radio waves are
> mysterious and invisible, so the successors of the Victorian mediums
> find them their natural hunting ground.

> When I was a child in the 1950s there was a man who used to stand in the
> marketplace selling miracle TV aerials. They comprised a coax plug with
> six feet of wire attached. At the end of the wire was a large army
> surplus electrolytic capacitor. The price was 5/-. "Take it home and try
> it. If you aren't completely satisfied bring it back next week for a
> full refund." But he only attended the market occasionally, probably
> once every couple on months.

There was a similar seller in Shepherds Bush Market in the '60s

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle

Re: FM-Dab aerial converter

<jdkhhbFpgpoU4@mid.individual.net>

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From: wrightsa...@f2s.com (williamwright)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: Fri, 6 May 2022 13:10:20 +0100
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In-Reply-To: <59e4404d2bcharles@candehope.me.uk>
 by: williamwright - Fri, 6 May 2022 12:10 UTC

On 06/05/2022 09:38, charles wrote:

>> When I was a child in the 1950s there was a man who used to stand in the
>> marketplace selling miracle TV aerials. They comprised a coax plug with
>> six feet of wire attached. At the end of the wire was a large army
>> surplus electrolytic capacitor. The price was 5/-. "Take it home and try
>> it. If you aren't completely satisfied bring it back next week for a
>> full refund." But he only attended the market occasionally, probably
>> once every couple on months.
>
> There was a similar seller in Shepherds Bush Market in the '60s
>

Judging from his infrequent appearances in Donny it might be the same man!

Bill

Re: FM-Dab aerial converter

<jdkqbtFr90fU1@mid.individual.net>

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From: timstrea...@greenbee.net (Tim Streater)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: 6 May 2022 14:41:01 GMT
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 by: Tim Streater - Fri, 6 May 2022 14:41 UTC

On 05 May 2022 at 20:39:47 BST, RJH <patchmoney@gmx.com> wrote:

> On 3 May 2022 at 20:49:28 BST, "williamwright" <wrightsaerials@f2s.com> wrote:
>
>> On 03/05/2022 08:10, RJH wrote:
>>> Anybody had any success with one of these? -
>>>
>>> https://www.aliexpress.com/item/1005002430541537.html
>>>
>>> 'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal Amplifier
>>> Radio Antenna Aerial for Car Radio'
>>
>> It's just an amplifier.
>
> Is it though? Does any sort of filtering or stuff happen to make it suitable
> for DAB?

Suitable in what way?

> It does seem odd to me that existing FM aerials can't be used, given all of my
> DAB portables seem to work with either a dangling wire or unextended
> telescopic aerial.

Wrong frequency band, I would have said. An FM aerial (on a rooftop at least)
is tuned to pick up from 88-105MHz or so, DAB seems to be 170-240MHz or so. A
bit of wire is not, of course, tuned vey well.

--
"The problem with defending the purity of the English language is that English is about as pure as a cribhouse whore. We don't just borrow words; on occasion, English has pursued other languages down alleyways to beat them unconscious and rifle their pockets for new vocabulary."

James Nicoll, rasfw

Re: FM-Dab aerial converter

<59e463c838charles@candehope.me.uk>

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NNTP-Posting-Date: Fri, 06 May 2022 10:19:22 -0500
From: char...@candehope.me.uk (charles)
Subject: Re: FM-Dab aerial converter
Newsgroups: uk.d-i-y
Date: Fri, 06 May 2022 16:05:40 +0100
Message-ID: <59e463c838charles@candehope.me.uk>
References: <t4qkge$t1f$1@dont-email.me> <jddfa7FeuklU4@mid.individual.net> <t51963$ln6$1@dont-email.me> <jdkqbtFr90fU1@mid.individual.net>
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 by: charles - Fri, 6 May 2022 15:05 UTC

In article <jdkqbtFr90fU1@mid.individual.net>, Tim Streater
<timstreater@greenbee.net> wrote:
> On 05 May 2022 at 20:39:47 BST, RJH <patchmoney@gmx.com> wrote:

> > On 3 May 2022 at 20:49:28 BST, "williamwright" <wrightsaerials@f2s.com>
> > wrote:
> >
> >> On 03/05/2022 08:10, RJH wrote:
> >>> Anybody had any success with one of these? -
> >>>
> >>> https://www.aliexpress.com/item/1005002430541537.html
> >>>
> >>> 'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal
> >>> Amplifier Radio Antenna Aerial for Car Radio'
> >>
> >> It's just an amplifier.
> >
> > Is it though? Does any sort of filtering or stuff happen to make it
> > suitable for DAB?

> Suitable in what way?

> > It does seem odd to me that existing FM aerials can't be used, given
> > all of my DAB portables seem to work with either a dangling wire or
> > unextended telescopic aerial.

> Wrong frequency band, I would have said. An FM aerial (on a rooftop at
> least) is tuned to pick up from 88-105MHz or so, DAB seems to be
> 170-240MHz or so. A bit of wire is not, of course, tuned vey well.

my elderly Band II aerial feeds my DAB tuner with no problems

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle

Re: FM-Dab aerial converter

<t53f0n$91i$1@gioia.aioe.org>

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From: Andrew97...@mybtinternet.com (Andrew)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: Fri, 6 May 2022 16:31:35 +0100
Organization: Aioe.org NNTP Server
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 by: Andrew - Fri, 6 May 2022 15:31 UTC

On 06/05/2022 16:05, charles wrote:
> In article <jdkqbtFr90fU1@mid.individual.net>, Tim Streater
> <timstreater@greenbee.net> wrote:
>> On 05 May 2022 at 20:39:47 BST, RJH <patchmoney@gmx.com> wrote:
>
>>> On 3 May 2022 at 20:49:28 BST, "williamwright" <wrightsaerials@f2s.com>
>>> wrote:
>>>
>>>> On 03/05/2022 08:10, RJH wrote:
>>>>> Anybody had any success with one of these? -
>>>>>
>>>>> https://www.aliexpress.com/item/1005002430541537.html
>>>>>
>>>>> 'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal
>>>>> Amplifier Radio Antenna Aerial for Car Radio'
>>>>
>>>> It's just an amplifier.
>>>
>>> Is it though? Does any sort of filtering or stuff happen to make it
>>> suitable for DAB?
>
>> Suitable in what way?
>
>>> It does seem odd to me that existing FM aerials can't be used, given
>>> all of my DAB portables seem to work with either a dangling wire or
>>> unextended telescopic aerial.
>
>> Wrong frequency band, I would have said. An FM aerial (on a rooftop at
>> least) is tuned to pick up from 88-105MHz or so, DAB seems to be
>> 170-240MHz or so. A bit of wire is not, of course, tuned vey well.
>
> my elderly Band II aerial feeds my DAB tuner with no problems
>

Could the (vertical) elderly coax be receiving more signal the
?horizontal dipole though ?

Re: FM-Dab aerial converter

<t53i5r$vsv$1@dont-email.me>

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From: patchmo...@gmx.com (RJH)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: Fri, 6 May 2022 16:25:31 -0000 (UTC)
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 by: RJH - Fri, 6 May 2022 16:25 UTC

On 6 May 2022 at 15:41:01 BST, "Tim Streater" <timstreater@greenbee.net>
wrote:

> On 05 May 2022 at 20:39:47 BST, RJH <patchmoney@gmx.com> wrote:
>
>> On 3 May 2022 at 20:49:28 BST, "williamwright" <wrightsaerials@f2s.com> wrote:
>>
>>>
>>> It's just an amplifier.
>>
>> Is it though? Does any sort of filtering or stuff happen to make it suitable
>> for DAB?
>
> Suitable in what way?
>

In a way that makes the FM aerial suitable for DAB.

>> It does seem odd to me that existing FM aerials can't be used, given all of my
>> DAB portables seem to work with either a dangling wire or unextended
>> telescopic aerial.
>
> Wrong frequency band, I would have said. An FM aerial (on a rooftop at least)
> is tuned to pick up from 88-105MHz or so, DAB seems to be 170-240MHz or so. A
> bit of wire is not, of course, tuned vey well.

If so, why can't there be some manner of thing that enables that, rather than
have to install a completely new assembly? Or maybe the DAB radio unit 'calls'
for the required frequency?

(I accept that obviously there can't or there wouldn't be a need for the DAB
aerial. Just curious)

--
Cheers, Rob

Re: FM-Dab aerial converter

<59e46f2990dave@davenoise.co.uk>

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From: dav...@davenoise.co.uk (Dave Plowman (News))
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: Fri, 06 May 2022 18:09:57 +0100
Organization: None
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 by: Dave Plowman (News) - Fri, 6 May 2022 17:09 UTC

In article <t51963$ln6$1@dont-email.me>,
RJH <patchmoney@gmx.com> wrote:
> On 3 May 2022 at 20:49:28 BST, "williamwright" <wrightsaerials@f2s.com> wrote:

> > On 03/05/2022 08:10, RJH wrote:
> >> Anybody had any success with one of these? -
> >>
> >> https://www.aliexpress.com/item/1005002430541537.html
> >>
> >> 'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal
> >> Amplifier Radio Antenna Aerial for Car Radio'
> >
> > It's just an amplifier.

> Is it though? Does any sort of filtering or stuff happen to make it
> suitable for DAB?

> It does seem odd to me that existing FM aerials can't be used, given all
> of my DAB portables seem to work with either a dangling wire or
> unextended telescopic aerial.

The passive convertor I bought to parallel the FM and DAB inputs to the
original telescopic aerial did work. Just not well enough.

> > Unless your receiver is very insensitive I can't see how it would
> > help. In fact in strong signal areas it's likely to overload the
> > radio's front end.
> >

> Mmm, OK noted, thanks.

--
*If your feet smell and your nose runs, you're built upside down.

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.

Re: FM-Dab aerial converter

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From: dav...@davenoise.co.uk (Dave Plowman (News))
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: Fri, 06 May 2022 18:12:05 +0100
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 by: Dave Plowman (News) - Fri, 6 May 2022 17:12 UTC

In article <59e463c838charles@candehope.me.uk>,
charles <charles@candehope.me.uk> wrote:
> In article <jdkqbtFr90fU1@mid.individual.net>, Tim Streater
> <timstreater@greenbee.net> wrote:
> > On 05 May 2022 at 20:39:47 BST, RJH <patchmoney@gmx.com> wrote:

> > > On 3 May 2022 at 20:49:28 BST, "williamwright" <wrightsaerials@f2s.com>
> > > wrote:
> > >
> > >> On 03/05/2022 08:10, RJH wrote:
> > >>> Anybody had any success with one of these? -
> > >>>
> > >>> https://www.aliexpress.com/item/1005002430541537.html
> > >>>
> > >>> 'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal
> > >>> Amplifier Radio Antenna Aerial for Car Radio'
> > >>
> > >> It's just an amplifier.
> > >
> > > Is it though? Does any sort of filtering or stuff happen to make it
> > > suitable for DAB?

> > Suitable in what way?

> > > It does seem odd to me that existing FM aerials can't be used, given
> > > all of my DAB portables seem to work with either a dangling wire or
> > > unextended telescopic aerial.

> > Wrong frequency band, I would have said. An FM aerial (on a rooftop at
> > least) is tuned to pick up from 88-105MHz or so, DAB seems to be
> > 170-240MHz or so. A bit of wire is not, of course, tuned vey well.

> my elderly Band II aerial feeds my DAB tuner with no problems

Car radios tend to have separate inputs for DAB and FM aerials.

--
*I couldn't repair your brakes, so I made your horn louder *

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.

Re: FM-Dab aerial converter

<jdl3enFsv0rU1@mid.individual.net>

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From: timstrea...@greenbee.net (Tim Streater)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: 6 May 2022 17:16:08 GMT
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 by: Tim Streater - Fri, 6 May 2022 17:16 UTC

On 06 May 2022 at 17:25:31 BST, RJH <patchmoney@gmx.com> wrote:

> On 6 May 2022 at 15:41:01 BST, "Tim Streater" <timstreater@greenbee.net>
> wrote:

>> Wrong frequency band, I would have said. An FM aerial (on a rooftop at least)
>> is tuned to pick up from 88-105MHz or so, DAB seems to be 170-240MHz or so. A
>> bit of wire is not, of course, tuned vey well.
>
> If so, why can't there be some manner of thing that enables that, rather than
> have to install a completely new assembly?

You could remove the FM aerial from your roof and rebuild it by hand, I
suppose.

> Or maybe the DAB radio unit 'calls' for the required frequency?

What does this mean?

I expect tunable aerials exist but they would require motors etc to move the
bits around. I imagine that what they do on radio telescopes.

--
HAL 9000: Dave. Put down those Windows disks. Dave. DAVE!

Re: FM-Dab aerial converter

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From: tnp...@invalid.invalid (The Natural Philosopher)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: Fri, 6 May 2022 18:38:51 +0100
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 by: The Natural Philosop - Fri, 6 May 2022 17:38 UTC

On 06/05/2022 15:41, Tim Streater wrote:
> On 05 May 2022 at 20:39:47 BST, RJH <patchmoney@gmx.com> wrote:
>
>> On 3 May 2022 at 20:49:28 BST, "williamwright" <wrightsaerials@f2s.com> wrote:
>>
>>> On 03/05/2022 08:10, RJH wrote:
>>>> Anybody had any success with one of these? -
>>>>
>>>> https://www.aliexpress.com/item/1005002430541537.html
>>>>
>>>> 'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal Amplifier
>>>> Radio Antenna Aerial for Car Radio'
>>>
>>> It's just an amplifier.
>>
>> Is it though? Does any sort of filtering or stuff happen to make it suitable
>> for DAB?
>
> Suitable in what way?
>
>> It does seem odd to me that existing FM aerials can't be used, given all of my
>> DAB portables seem to work with either a dangling wire or unextended
>> telescopic aerial.
>
> Wrong frequency band, I would have said. An FM aerial (on a rooftop at least)
> is tuned to pick up from 88-105MHz or so

88-108.lots of stuff on 105,106,107 MHz...
> DAB seems to be 170-240MHz or so. A
> bit of wire is not, of course, tuned very well.
>
At that frequency a quarter wave is under a foot long

--
Gun Control: The law that ensures that only criminals have guns.

Re: FM-Dab aerial converter

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From: char...@candehope.me.uk (charles)
Subject: Re: FM-Dab aerial converter
Newsgroups: uk.d-i-y
Date: Fri, 06 May 2022 18:38:58 +0100
Message-ID: <59e471d0fbcharles@candehope.me.uk>
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 by: charles - Fri, 6 May 2022 17:38 UTC

In article <59e46f5b0edave@davenoise.co.uk>,
Dave Plowman (News) <dave@davenoise.co.uk> wrote:
> In article <59e463c838charles@candehope.me.uk>,
> charles <charles@candehope.me.uk> wrote:
> > In article <jdkqbtFr90fU1@mid.individual.net>, Tim Streater
> > <timstreater@greenbee.net> wrote:
> > > On 05 May 2022 at 20:39:47 BST, RJH <patchmoney@gmx.com> wrote:

> > > > On 3 May 2022 at 20:49:28 BST, "williamwright" <wrightsaerials@f2s.com>
> > > > wrote:
> > > >
> > > >> On 03/05/2022 08:10, RJH wrote:
> > > >>> Anybody had any success with one of these? -
> > > >>>
> > > >>> https://www.aliexpress.com/item/1005002430541537.html
> > > >>>
> > > >>> 'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal
> > > >>> Amplifier Radio Antenna Aerial for Car Radio'
> > > >>
> > > >> It's just an amplifier.
> > > >
> > > > Is it though? Does any sort of filtering or stuff happen to make it
> > > > suitable for DAB?

> > > Suitable in what way?

> > > > It does seem odd to me that existing FM aerials can't be used, given
> > > > all of my DAB portables seem to work with either a dangling wire or
> > > > unextended telescopic aerial.

> > > Wrong frequency band, I would have said. An FM aerial (on a rooftop at
> > > least) is tuned to pick up from 88-105MHz or so, DAB seems to be
> > > 170-240MHz or so. A bit of wire is not, of course, tuned vey well.

> > my elderly Band II aerial feeds my DAB tuner with no problems

> Car radios tend to have separate inputs for DAB and FM aerials.

so does my hifi unit.

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle

Re: FM-Dab aerial converter

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From: timstrea...@greenbee.net (Tim Streater)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: 6 May 2022 18:00:19 GMT
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 by: Tim Streater - Fri, 6 May 2022 18:00 UTC

On 06 May 2022 at 18:38:51 BST, The Natural Philosopher <tnp@invalid.invalid>
wrote:

> On 06/05/2022 15:41, Tim Streater wrote:
>> On 05 May 2022 at 20:39:47 BST, RJH <patchmoney@gmx.com> wrote:
>>
>>> On 3 May 2022 at 20:49:28 BST, "williamwright" <wrightsaerials@f2s.com> wrote:
>>>
>>>> On 03/05/2022 08:10, RJH wrote:
>>>>> Anybody had any success with one of these? -
>>>>>
>>>>> https://www.aliexpress.com/item/1005002430541537.html
>>>>>
>>>>> 'Conversion Cable DAB+ Antenna AM/FM ISO Jack to ISO Male Signal Amplifier
>>>>> Radio Antenna Aerial for Car Radio'
>>>>
>>>> It's just an amplifier.
>>>
>>> Is it though? Does any sort of filtering or stuff happen to make it suitable
>>> for DAB?
>>
>> Suitable in what way?
>>
>>> It does seem odd to me that existing FM aerials can't be used, given all of my
>>> DAB portables seem to work with either a dangling wire or unextended
>>> telescopic aerial.
>>
>> Wrong frequency band, I would have said. An FM aerial (on a rooftop at least)
>> is tuned to pick up from 88-105MHz or so
>
> 88-108.lots of stuff on 105,106,107 MHz...
>> DAB seems to be 170-240MHz or so. A
>> bit of wire is not, of course, tuned very well.
>>
> At that frequency a quarter wave is under a foot long

Sure but I assume a multi-element aerial tuned for the frequency band will
give a better result. And pointing at the transmitter.

--
"If you're not able to ask questions and deal with the answers without feeling that someone has called your intelligence or competence into question, don't ask questions on Usenet where the answers won't be carefully tailored to avoid tripping your hair-trigger insecurities."

D M Procida, UCSM

Re: FM-Dab aerial converter

<op.1lrey4vcc5duzs@pvr2.lan>

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From: kdj...@gmail.com (Jock)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: Sat, 07 May 2022 04:29:18 +1000
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 by: Jock - Fri, 6 May 2022 18:29 UTC

On Sat, 07 May 2022 03:16:08 +1000, Tim Streater
<timstreater@greenbee.net> wrote:

> On 06 May 2022 at 17:25:31 BST, RJH <patchmoney@gmx.com> wrote:
>
>> On 6 May 2022 at 15:41:01 BST, "Tim Streater" <timstreater@greenbee.net>
>> wrote:
>
>>> Wrong frequency band, I would have said. An FM aerial (on a rooftop at
>>> least)
>>> is tuned to pick up from 88-105MHz or so, DAB seems to be 170-240MHz
>>> or so. A
>>> bit of wire is not, of course, tuned vey well.
>>
>> If so, why can't there be some manner of thing that enables that,
>> rather than
>> have to install a completely new assembly?
>
> You could remove the FM aerial from your roof and rebuild it by hand, I
> suppose.
>
>> Or maybe the DAB radio unit 'calls' for the required frequency?
>
> What does this mean?
>
> I expect tunable aerials exist but they would require motors etc to move
> the
> bits around. I imagine that what they do on radio telescopes.

No, radio telescopes are dishes which aren't tuned.

Re: FM-Dab aerial converter

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From: timstrea...@greenbee.net (Tim Streater)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
Date: 6 May 2022 21:19:05 GMT
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 by: Tim Streater - Fri, 6 May 2022 21:19 UTC

On 06 May 2022 at 19:29:18 BST, Jock <kdj@gmail.com> wrote:

> On Sat, 07 May 2022 03:16:08 +1000, Tim Streater
> <timstreater@greenbee.net> wrote:
>
>> On 06 May 2022 at 17:25:31 BST, RJH <patchmoney@gmx.com> wrote:
>>
>>> On 6 May 2022 at 15:41:01 BST, "Tim Streater" <timstreater@greenbee.net>
>>> wrote:
>>
>>>> Wrong frequency band, I would have said. An FM aerial (on a rooftop at
>>>> least)
>>>> is tuned to pick up from 88-105MHz or so, DAB seems to be 170-240MHz
>>>> or so. A
>>>> bit of wire is not, of course, tuned vey well.
>>>
>>> If so, why can't there be some manner of thing that enables that,
>>> rather than
>>> have to install a completely new assembly?
>>
>> You could remove the FM aerial from your roof and rebuild it by hand, I
>> suppose.
>>
>>> Or maybe the DAB radio unit 'calls' for the required frequency?
>>
>> What does this mean?
>>
>> I expect tunable aerials exist but they would require motors etc to move
>> the
>> bits around. I imagine that what they do on radio telescopes.
>
> No, radio telescopes are dishes which aren't tuned.

Well I hope not, otherwise they'll be picking up all sorts of broadcast shit.

--
"The problem with defending the purity of the English language is that English is about as pure as a cribhouse whore. We don't just borrow words; on occasion, English has pursued other languages down alleyways to beat them unconscious and rifle their pockets for new vocabulary."

James Nicoll, rasfw

Re: FM-Dab aerial converter

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From: wrightsa...@f2s.com (williamwright)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
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 by: williamwright - Sat, 7 May 2022 01:02 UTC

On 06/05/2022 17:25, RJH wrote:
> In a way that makes the FM aerial suitable for DAB.

No, not possible. It can't alter the resonance of the aerial, and it's
at the wrong end of the cable to correct the matching (because an
end-fed quarter wave 100MHz whip is after all an end-fed half-wave whip
at 200MHz, so it's more-or-less resonant but doesn't match the 50ohm
feeder very well because the characteristic impedance is in the
thousands of ohms).

Bill

Re: FM-Dab aerial converter

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From: wrightsa...@f2s.com (williamwright)
Newsgroups: uk.d-i-y
Subject: Re: FM-Dab aerial converter
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 by: williamwright - Sat, 7 May 2022 01:05 UTC

On 06/05/2022 18:16, Tim Streater wrote:

>
> I expect tunable aerials exist but they would require motors etc to move the
> bits around. I imagine that what they do on radio telescopes.
>

No you'd use an ATU. Not VHF but MF, but in the 1960s I used to use an
ATU in the van for reception of the pirates and it made a lot of
difference. I was feeding the signal into a portable radio because for a
while I didn't have a car radio.

Bill

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