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[tigers_gonads]

http://www.ebay.co.uk/itm/Connects2-CTDAB-2-Universal-DAB-Digital-Radio-Tuner-for-all-FM-car-stereo-radios-/190790935692?pt=UK_In_Car_Technology&hash=item2c6c06a48c

I have already fitted the ipod unit from the same manufature with no problems at all by splicing it inline into the ariel wire in the drivers side footwell.

Looking for dab in the car now 

[amba]

Whats the reception like with the glass mounted aerial.

I had poor reception when using the Highway unit with the provided glass aerial but when replaced with a Hirchman as advised it was trully brilliant

[Dave DND]

The problem with any device that goes in line with the existing aerial lead is one of signal quality.

Whilst the device you have added may work well enough, the extra joints and inline circuitry is often just enough to prevent the very poor quality radio signal from the car antenna to actually reach the radio.

Used with an external aerial should be fine, but an internal or amplified aerial, and you may have signal strength issues when listening to your radio.

 

[tigers_gonads]

The problem with any device that goes in line with the existing aerial lead is one of signal quality.

Whilst the device you have added may work well enough, the extra joints and inline circuitry is often just enough to prevent the very poor quality radio signal from the car antenna to actually reach the radio.

Used with an external aerial should be fine, but an internal or amplified aerial, and you may have signal strength issues when listening to your radio.

 

Is that why I loose most of the fm signal for the other radio channels when the ipod is switched on ? I've found that as soon as I turn the Ipod off, it returns as good as new or is this down to the inline transmitter drowning out the weaker signal from the roof ariel ?
I did try out the various frequencies and settled on 88.0 mhz.
The ipod unit is powered from the switched live at the back of the head unit with a tiny inline fuse 

[tigers_gonads]

Whats the reception like with the glass mounted aerial.

I had poor reception when using the Highway unit with the provided glass aerial but when replaced with a Hirchman as advised it was trully brilliant

Just using the ipod one at the moment amba.
No aeriel, its hardired inline

[amba]

Agree with what Dave has said and it was on his excellent advise that I bought the Hirschamn aerial that has been fitted in place of the existing stubby aerial on my M/f Elite for well over a year now.

Signal strength is very good and only rarely do I loose the signal this being only when in the "outback"

Best £50,s worth of entertainment I have spent out on for many years

External aerial is the way to go with a direct lead from aerial to the unit. 

[Dave DND]

External aerial is the way to go with a direct lead from aerial to the unit.

You would never put a TV aerial in the loft and expect a watchable picture

And yet you would all argue that the INTERNAL aerial in the Omega is sufficient

It isn`t 

[Marks DTM Calib]

Is that why I loose most of the fm signal for the other radio channels when the ipod is switched on ? I've found that as soon as I turn the Ipod off, it returns as good as new or is this down to the inline transmitter drowning out the weaker signal from the roof ariel ?
I did try out the various frequencies and settled on 88.0 mhz.
The ipod unit is powered from the switched live at the back of the head unit with a tiny inline fuse 

Thats because the transmiter in the Fm device is crap and is kicking out way more than the frequency it should.

Add in that the signal output will also be high so the RF demod AGC will wind right down reducing the signal strength on the other channels.

I ahev to say, I never had issues with signal strength for the radio on any of the Omegas though.

[chrisgixer]

As some know on here, I have a Harmon a kardon fm modulator hard wired into the fm aerial on the back of the 2015.

There's a clear difference in reception with it.
1 fine before it was connected (obviously)
2 roughly a 20% loss in signal strength when the device is off.
3 roughly 50% signal loss when the device is on. (Which doesn't matter if your listening to the device)

%loss is a guess based on radio stations available! just yo give an idea.

So there will be a loss of fm signal.

Iirc TB said expect 30% loss of signal per connection/join in the aerial

[TheBoy]

External aerial is the way to go with a direct lead from aerial to the unit.

You would never put a TV aerial in the loft and expect a watchable picture

And yet you would all argue that the INTERNAL aerial in the Omega is sufficient

It isn`t 

I'm a fair way from our TV transmitter, in Oxford (the one that famously caught fire when "testing" for DSO, so spent several months on a smaller tower at reduced power), and I have an indoor aerial. It just needs to be suitably sized

[TheBoy]

As some know on here, I have a Harmon a kardon fm modulator hard wired into the fm aerial on the back of the 2015.

There's a clear difference in reception with it.
1 fine before it was connected (obviously)
2 roughly a 20% loss in signal strength when the device is off.
3 roughly 50% signal loss when the device is on. (Which doesn't matter if your listening to the device)

%loss is a guess based on radio stations available! just yo give an idea.

So there will be a loss of fm signal.

Iirc TB said expect 30% loss of signal per connection/join in the aerial

3db from memory...

[Marks DTM Calib]

Nah, coax socket of half decent quality will have an insertion loss of of 0.2-0.4dB

An active device if well designed similar......the 'well designed' bit being the key.

[Kevin Wood]

External aerial is the way to go with a direct lead from aerial to the unit.

You would never put a TV aerial in the loft and expect a watchable picture

And yet you would all argue that the INTERNAL aerial in the Omega is sufficient

It isn`t 

I'm a fair way from our TV transmitter, in Oxford (the one that famously caught fire when "testing" for DSO, so spent several months on a smaller tower at reduced power), and I have an indoor aerial. It just needs to be suitably sized

Indoor one works fine for me, too.. Practically in line of sight from Rowridge (but a fair distance away!).

[chrisgixer]

While they chat amongst themselves about stuff nobody understands.

Accept. The fm signal will suffer.

[tigers_gonads]

Now how many times have I had posts deleted due to thread drift