Shocking Radio Reception....

[jungle]

So what happened here, i have shit reception as well.

 

[deadlast]

About to change head units on the weekend so keen for details as well.

Sent from my Nexus 4 using Tapatalk 2

 

[dwarfmarine]

shit, totally forgot to reply to this.

Made a tiny difference... not really worth the pissing around.

Starting to think it may be a power source problem with the amplifiers that are behind the 'd' pillar trim

 

[ed84]

:sad: sorry it didn't work for you, for me, i used to not be able to get past Port Adelaide without reception dieing in the ass. now i can get all the way to work with clear radio. My next HU will be a a DAB+ radio.
JVC KD-DB52 maybe?

 

[dwarfmarine]

Weird thing was, when I had a new battery put in, I had crystal clear reception for about a week then nothing.

 

[fuji_heavy]

i replaced the pioneer bluetooth headunit from my legnum with a JVC one i like better from my old silvia and the reception is now terrible. Whats the latest with a solution for this ?

 

[Lasiorhinus]

Return the JVC radio to the Silvia, and ensure your Legnum has a radio with dual antenna inputs, known as Diversity.

 

[dwarfmarine]

Return the JVC radio to the Silvia, and ensure your Legnum has a radio with dual antenna inputs, known as Diversity.

Oh shit, looks like I can't do this anymore since chopping the little plug off haha

How common are stereos with diversity inputs though?

 

[Lasiorhinus]

In Japan, very much common, not so common here.
However if you've cut off your antenna plug, that's not likely to improve your radio reception.

 

[dwarfmarine]

I cut the smaller one off to replace it with a larger one(so I could try a 2-into-1 into the headunit)
so I still have 2 antenna plugs, though both of mine are big whereas yours would be a big and a small

 

[Kaida]

DAB adapter...
http://www.dabonwheels.co.uk/FM-AM_to_FM-AM-DAB_aerial_converter.html
Others on here have a better idea of the plugs we need, but this is our aus aerial receiver and 2 outs, plus what looks like volts.
If I'm offtrack, oh well. Am looking at getting digital radio for Kaida, have heard it solved another owners reception problems.
Meh.

 

[dilger]

I just recently bought a new sony head unit which had its own 12v output wire (blue/white stripe) specifcally designed for a power supply to powered antennas. I crimped a plug on to and plugged it on to the existing plug on the antenna cable, and it has boosted my signal dramatically. Not sure why it shouldnt have worked for you. Make sure the wire you have connected is 12v with a multimeter?

 

[fuji_heavy]

the pioneer one that i took out didnt have diversity inputs, it just had better reception but it was a POS when it came to the menus and the screen visuals. i dont want to put it back in, just need decent reception again. my silvia didnt have an antenna, i had a little box that hooked up to the rear window demister as used that as an antenna. could this work on the legnum ?

 

[Lasiorhinus]

Thats the basic concept of the Legnum's antenna anyway - its the wiring in your side windows in the boot, that looks like demister wiring.

 

[fuji_heavy]

but why is it so bad then ?

 

[uzz320]

Because they are designed to be used together after being processed by a diversity amplifier, without the diversity amplifier the signal from one antenna track in the glass is too weak (at times). They are also designed such that the signal is always strong regardless of which side of the car it is coming from, hence one antenna on each side of the car, but with only one antenna connected the signal tends to have issues when there are obstructions on that side of the car. Basically the two glass antennas and the diversity amplifier are an engineered package, designed to work together - the glass track is not designed to be a standalone antenna for a head unit.

 

[fuji_heavy]

ahhh i see. so what would happen if i splice the antenna cable into this box from my old car and hook it up to the larger demister on the rear window ?

 

[Nitephyre]

What I don't get then is why there isn't a readily available converter to use the system for non-JDM areas, I mean surely SOMEONE with brains has gotten jack of bad reception

 

[uzz320]

ahhh i see. so what would happen if i splice the antenna cable into this box from my old car and hook it up to the larger demister on the rear window ?

It would work at least as well as it did in your old car I would suggest, but just hook it up to the demister - I don't see it going well if you try and connect the demister and the window antennas to each other...

What I don't get then is why there isn't a readily available converter to use the system for non-JDM areas, I mean surely SOMEONE with brains has gotten jack of bad reception

The problem is that the diversity amplifier is different for each car, they are designed for the particular application - in the VR4 it is in the OEM head unit, but some have up to 4 antennas with one antenna being dominant. They tend to be quite complex; they don't just splice the signal, they actually use the multiple inputs to correct signal defects - it can correct for phase shifts, time delays etc that are caused by the signal taking different paths to both antennas (bouncing off of buildings etc). They need to be built to suit the application. Does that make sense?

 

[Nitephyre]

Makes sense, still sucks *mumbles like an 8yo*