2 Radio Aerials - How do you connect both?

willbowles · Apr 15, 2014

Morning all,

I put a new HU in my Disco but now have poorer radio reception and no AM. I understand that the second aerial is an amplified one but I wasn't sure how to connect it as well as the standard one.

Does anyone know how to connect both to an after market HU? Is there an adapter or anything like that?

Cheers

Will

discool · Apr 15, 2014

As u don't now a head unit that will accept Antenna Diversity why do u wish to connect both?
One will or should give a stronger signal so use that as your antenna feed.

willbowles · Apr 15, 2014

Thanks for the reply, only 1 fit, the other has a slightly larger male connection. It's probably the other that will give the stronger signal as currently as the signal drops constantly.

Nig · Apr 15, 2014

I have fitted an aftermarket HU
I only saw a normal aerial plug which works fine.
good reception on radio 2 even with the aerial down

The only other plug was the amp which I made a lead for .

???

willbowles · Apr 15, 2014

I think the later models had the aerials fitted in the glass of the rear windows, looks a bit like heated glass. Mine has a wire going through the middle both rear windows.

Nig · Apr 15, 2014

willbowles said:
I think the later models had the aerials fitted in the glass of the rear windows, looks a bit like heated glass. Mine has a wire going through the middle both rear windows.

Ah. Was confused about two aerials.

This might help.

http://www.landyzone.co.uk/lz/f8/where-find-radio-antenna-188056.html

brian47 · Apr 15, 2014

Yes, there are two aerials on the Disco, one for FM and the other for AM (long wave and medium wave). Each is run down the middle of the rear windows, I think the FM is on the offside and the AM on the nearside windows. Each has its own amplifier above the headlining.

The standards for domestic radio equipment recommends 75 ohm for aerial feeders and loadings. (it's 50 ohm for communications equipment incl CB stuff.)

The easiest thing to try and it's a cheap little unit would be to get hold of a TV aerial splitter/combiner, change the connectors on the cables for the Belling-Lee TV type coax plugs and try it.

HenryD · Apr 15, 2014

Nig said:
I have fitted an aftermarket HU
I only saw a normal aerial plug which works fine.
good reception on radio 2 even with the aerial down
The only other plug was the amp which I made a lead for .

???

The Harmon Kardon Alpine head unit does indeed have two ariels,one is smaller than the standard type I think,I temporaliy fitted a normal head unit in mine using just one ariel wire and it worked fine but I think the antenna booster has to be fed with the electric ariel feed on the head unit to work

Nig · Apr 16, 2014

HenryD said:
The Harmon Kardon Alpine head unit does indeed have two ariels,one is smaller than the standard type I think,I temporaliy fitted a normal head unit in mine using just one ariel wire and it worked fine but I think the antenna booster has to be fed with the electric ariel feed on the head unit to work

Mine is a disco 1. I take it the two aerials are on disco 2's ?

willbowles · Apr 16, 2014

I think they change to 2 aerials half way through the Disco 2 cycle but I could be wrong?

listerdiesel · Apr 16, 2014

Disco 2's had the two aerials when the Harmon Kardon unit was fitted, aka 'High End Audio System'.

Our D2 is 1998 build ans had both aerials and the H-K unit.

Peter

2 Radio Aerials - How do you connect both?

willbowles

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