DAB antenna.

I

ian field

Guest
Most DAB radios just have a length of wire dangling out the back - is the
length random or do the manufacturers make it a specific length for DAB
frequency?

TIA.
 
"ian field" <gangprobing.alien@ntlworld.com> wrote in message
news:VzLCl.241130$Hk2.188212@newsfe22.ams2...
Most DAB radios just have a length of wire dangling out the back - is the
length random or do the manufacturers make it a specific length for DAB
frequency?

TIA.

Ian,
I live in the USA, we don't use DAB here, but as with any receiver there
would be an optimum length for a certain frequency.
With most modern receiver designs I don't think you could measure the
difference in received signal with a less than optimum antenna length.
My guess is that they just use a convenient length.
If someone knows otherwise I will stand corrected.

Tom
 
"Tom Biasi" <tombiasi@optonline.net> wrote in message
news:49db8c99$0$22510$607ed4bc@cv.net...
"ian field" <gangprobing.alien@ntlworld.com> wrote in message
news:VzLCl.241130$Hk2.188212@newsfe22.ams2...
Most DAB radios just have a length of wire dangling out the back - is the
length random or do the manufacturers make it a specific length for DAB
frequency?

TIA.

Ian,
I live in the USA, we don't use DAB here, but as with any receiver there
would be an optimum length for a certain frequency.
With most modern receiver designs I don't think you could measure the
difference in received signal with a less than optimum antenna length.
My guess is that they just use a convenient length.
If someone knows otherwise I will stand corrected.

Tom
In the building where I live the wall plastering was put up on wire mesh
panels screwed to the brickwork - almost a Faraday cage, so my DAB reception
(not good at the best of times!) needs all the help it can get.
 
"ian field" <gangprobing.alien@ntlworld.com> wrote in message
news:ClMCl.2$bq4.1@newsfe29.ams2...
"Tom Biasi" <tombiasi@optonline.net> wrote in message
news:49db8c99$0$22510$607ed4bc@cv.net...

"ian field" <gangprobing.alien@ntlworld.com> wrote in message
news:VzLCl.241130$Hk2.188212@newsfe22.ams2...
Most DAB radios just have a length of wire dangling out the back - is
the length random or do the manufacturers make it a specific length for
DAB frequency?

TIA.

Ian,
I live in the USA, we don't use DAB here, but as with any receiver there
would be an optimum length for a certain frequency.
With most modern receiver designs I don't think you could measure the
difference in received signal with a less than optimum antenna length.
My guess is that they just use a convenient length.
If someone knows otherwise I will stand corrected.

Tom

In the building where I live the wall plastering was put up on wire mesh
panels screwed to the brickwork - almost a Faraday cage, so my DAB
reception (not good at the best of times!) needs all the help it can get.

You need to get a piece of wire (antenna) outside.
 
Tom Biasi wrote:

"ian field" <gangprobing.alien@ntlworld.com> wrote
"Tom Biasi" <tombiasi@optonline.net> wrote in message
"ian field" <gangprobing.alien@ntlworld.com> wrote

Most DAB radios just have a length of wire dangling out the back - is
the length random or do the manufacturers make it a specific length for
DAB frequency?

Ian,
I live in the USA, we don't use DAB here, but as with any receiver there
would be an optimum length for a certain frequency.
With most modern receiver designs I don't think you could measure the
difference in received signal with a less than optimum antenna length.
My guess is that they just use a convenient length.
If someone knows otherwise I will stand corrected.

In the building where I live the wall plastering was put up on wire mesh
panels screwed to the brickwork - almost a Faraday cage, so my DAB
reception (not good at the best of times!) needs all the help it can get.

You need to get a piece of wire (antenna) outside.
Just what I was thinking. In my yoof, I had a multi waveband radio and used
about 100 ft of 7/0.2 wire strung over the trees in the garden as my antenna.
That worked well.

Graham
 
"Tom Biasi" <tombiasi@optonline.net> wrote in message
news:49dbe7fb$0$22521$607ed4bc@cv.net...
"ian field" <gangprobing.alien@ntlworld.com> wrote in message
news:ClMCl.2$bq4.1@newsfe29.ams2...

"Tom Biasi" <tombiasi@optonline.net> wrote in message
news:49db8c99$0$22510$607ed4bc@cv.net...

"ian field" <gangprobing.alien@ntlworld.com> wrote in message
news:VzLCl.241130$Hk2.188212@newsfe22.ams2...
Most DAB radios just have a length of wire dangling out the back - is
the length random or do the manufacturers make it a specific length for
DAB frequency?

TIA.

Ian,
I live in the USA, we don't use DAB here, but as with any receiver there
would be an optimum length for a certain frequency.
With most modern receiver designs I don't think you could measure the
difference in received signal with a less than optimum antenna length.
My guess is that they just use a convenient length.
If someone knows otherwise I will stand corrected.

Tom

In the building where I live the wall plastering was put up on wire mesh
panels screwed to the brickwork - almost a Faraday cage, so my DAB
reception (not good at the best of times!) needs all the help it can get.

You need to get a piece of wire (antenna) outside.
That might not be necessary-

The landlord has recently hired contractors to fit the block of flats with
new communal aerial system, it has DVB and sockets for satellite should
anyone wish to subscribe. The socket plate also has a radio socket, the
radio and the socket are in diagonally opposite corners of the room making a
co-ax run less than convenient and the radio doesn't have an antenna socket
anyway. A possible plan might be to plug a re-radiating antenna into the
radio socket - feedback shouldn't be a problem due to the plastering steel
mesh that's making reception difficult in the first place - the signal will
still be very low level so getting the antenna lengths just right is
probably still necessary.
 

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