↓ Advertise on Defender2 ↓

Home > Maintenance & Modifications > Alarm - Remote Operating Range
Post Reply  Down to end
Page 3 of 4 <1234>
Print this entire topic · 
Dave-H



Member Since: 08 Feb 2011
Location: Surrey
Posts: 1507
England 2007 Defender 90 Puma 2.4 HT Tonga Green
ARMYBOB wrote:
anyone watch top gear?

put the remote against your head, it genuinely works, i always look a tw@ in the car park!

Yea lol ... i do it all the time [Well .. under my chin] Guns and Landrovers .... anything else is irrelevant.
Post #70755 12th May 2011 8:23pm
View user's profile Send private message View poster's gallery Reply with quote
XS Pete



Member Since: 13 Jan 2011
Location: Suffolk
Posts: 632
England 2011 Defender 90 Puma 2.4 XS CSW Stornoway Grey
Quote:
Puma up to 11my 11my and after has a different set up

That explains that then. Don't mean to rub it in but my MY11 90 has awsome range straight out of the box. I did wonder if the set up was different on later vehicles.
Pete
Post #70775 12th May 2011 10:02pm
View user's profile Send private message View poster's gallery Reply with quote
XS Pete



Member Since: 13 Jan 2011
Location: Suffolk
Posts: 632
England 2011 Defender 90 Puma 2.4 XS CSW Stornoway Grey
The more I think about this, the more I'm sure it can be optimised for maximum range by selecting the correct length of cable as the receiving antenna. Basically, (and not going into too much of the physics) maximum range would be obtained by making the receiving antenna exactly one wavelength of the transmission freqency.

I haven't looked, but I suspect that LR have made this antenna what is known a 'a quarter wave antenna' where it is one quarter of one wavelength in length. This can be improved by making it one half wavelength or better still one whole wavelength. I'm not going into exact details of the calculation as this would give away the alarm frequency to the light fingered brigade, but owners will know as it is written on a sticker on the back of the keyfob.

Armed with this value and a little physics gives the optimum (one wavelength) antenna length as 0.6924M if you can find room for it, or 0.3462M for a half wavelength. Remember that this length needs to be measured exactly from the joint on the PCB of whatever module the antenna is connected to, to the free end.

Any other lengths will also work and probably be an improvement upon the original, although some intermediate lengths may actually be less efficive than the original, but to get the absolute maximum possible range, 0.6924M is what you need to aim for.

Pete
Post #70791 13th May 2011 8:02am
View user's profile Send private message View poster's gallery Reply with quote
blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17372
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
It is worth bearing in mind that the more sensitive a receiver is, the mose susceptible to interference. Many car remotes are IMHO far too sensitive - I don't want to unlock my car from 400 yards away; it greatly increasese the risk of accidentally unlocking it and not knowing (which is why many cars now auto-relock if the door isn't opened for a preset period after unlocking (better hope that Johnny Tealeaf doesn't get there in the meantime)).

I went through a period of about a month when my Disco2 could not be locked or unlocked with the remote when parked on my drive, but was fine if it was parked in the road by the end of the drive, a classic symptom of local interference. Major nuisance going through the EKA routine to open and remobilise the car every time, especially in the rain (if you have ever used a Disco2 EKA you will know why). I was lucky, by borrowing some very expensive test kit from work I was able to establish that it was a faulty TETRA cell nearby, Dorset having just gone live with TETRA at the time. A few emails to Hutchison, operators of the TETRA network in Dorset and who naturally denied it could possibly be what I knew it to be, and the problem mysteriously went away and has never - at least not yet - recurred.

Admittedly the Defender takes the low sensititvity to a ridiculous extreme; if you have to stand by the driver's door mirror to unlock with the remote, there's not much point having one. After extending my aerial I can long or unlock the car (usually) from about 50 feet away, which I reckon is about right.
Post #70808 13th May 2011 11:11am
View user's profile Send private message View poster's gallery Reply with quote
bartsimp



Member Since: 18 Jan 2012
Location: France
Posts: 41
1987 Defender 90 2.5 TD ST Keswick Green
Hi, is it also on the driver side for non uk cars ?
Post #122216 7th Feb 2012 9:00pm
View user's profile Send private message View poster's gallery Reply with quote
Laurie



Member Since: 22 Feb 2008
Location: Sussex, England
Posts: 2897
England 2005 Defender 90 Td5 XS CSW Bonatti Grey
The reason why euroboxes are fitted with long distance remotes is so you can find yours amongst all the other euroboxes. 
Post #122217 7th Feb 2012 9:03pm
View user's profile Send private message View poster's gallery Send e-mail Reply with quote
bartsimp



Member Since: 18 Jan 2012
Location: France
Posts: 41
1987 Defender 90 2.5 TD ST Keswick Green
Laurie wrote:
The reason why euroboxes are fitted with long distance remotes is so you can find yours amongst all the other euroboxes.

hum, is this an answer to my question Wink ?
Post #122218 7th Feb 2012 9:05pm
View user's profile Send private message View poster's gallery Reply with quote
custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20354
United Kingdom 
bartsimp wrote:
Hi, is it also on the driver side for non uk cars ?

It's hard to say as none of us in the UK know well at least I don't. I would guess it would be on the drivers side on the left for you but it wouldn't take long to just check Thumbs Up
Post #122229 7th Feb 2012 9:34pm
View user's profile Send private message View poster's gallery Reply with quote
bartsimp



Member Since: 18 Jan 2012
Location: France
Posts: 41
1987 Defender 90 2.5 TD ST Keswick Green
I'll do and report back, thanks
Post #122237 7th Feb 2012 10:05pm
View user's profile Send private message View poster's gallery Reply with quote
AtleCM



Member Since: 15 Apr 2011
Location: Kristiansand
Posts: 13
Norway 2005 Defender 110 Td5 SW Java Black
bartsimp wrote:
Hi, is it also on the driver side for non uk cars ?


It is on the left hand side, at least in Norway Smile Atle CM
Norway
Def 110, S2a 88, S3 109, S2b FC
Post #122605 9th Feb 2012 9:53am
View user's profile Send private message View poster's gallery Reply with quote
XS Pete



Member Since: 13 Jan 2011
Location: Suffolk
Posts: 632
England 2011 Defender 90 Puma 2.4 XS CSW Stornoway Grey
Quote:
It's hard to say as none of us in the UK know


I think plenty do know and have made the necessary modifications to improve the range. Fortunately though, most don't give away too much specific detail on a public forum Rolling Eyes
Post #122700 9th Feb 2012 3:38pm
View user's profile Send private message View poster's gallery Reply with quote
bartsimp



Member Since: 18 Jan 2012
Location: France
Posts: 41
1987 Defender 90 2.5 TD ST Keswick Green
As I mentionned I will this week end. If I'm brave enough, I will post a photo tutorial in this thread.
Post #122703 9th Feb 2012 3:50pm
View user's profile Send private message View poster's gallery Reply with quote
custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20354
United Kingdom 
XS Pete wrote:
Quote:
It's hard to say as none of us in the UK know


I think plenty do know and have made the necessary modifications to improve the range. Fortunately though, most don't give away too much specific detail on a public forum Rolling Eyes


I was talking about where the rough area for 'it' is he knows what I mean and likewise. No detail involved
Post #122714 9th Feb 2012 4:30pm
View user's profile Send private message View poster's gallery Reply with quote
mattlab



Member Since: 16 May 2011
Location: suffolk
Posts: 143
England 2009 Defender 110 Puma 2.4 USW Galway Green
i`ve been trying to extend my antenna wire but i dont have an orange/grey trace wire, instead i have a black wire coming out of the loom then the black insulation is stripped back to reveal a white wire with a metal sheathing, the white wire then goes in the back left hand terminal on the plug and the metal sheathing goes in the left hand front terminal (as you look at it) anyone else got this and why is it different ? is the white wire the antenna ? LIFE`S TOO SHORT TO DRIVE A BORING VEHICLE
Post #126854 26th Feb 2012 12:51pm
View user's profile Send private message View poster's gallery Send e-mail Reply with quote
bartsimp



Member Since: 18 Jan 2012
Location: France
Posts: 41
1987 Defender 90 2.5 TD ST Keswick Green
So I did it a few weeks ago and I'm stunned about how well it works.
Here are a few pics and steps :

On LHD :
1. Remove speaker
2. Remove 3 screws of black plastic cable "hider" next to the wind screen
3. Make a cable long enough (1.5m approx),
4. Cut the end of the cable to make the metal appear on 1cm
5. Send the newly made cable to the roof above the door and send it in the dash to the speaker area
6. Link the Orange cable that hangs and your new cable

Done ! (approx 5 mins Wink)

Some pictures:
Post #128607 4th Mar 2012 1:16pm
View user's profile Send private message View poster's gallery Reply with quote
Post Reply  Back to top
Page 3 of 4 <1234>
All times are GMT

Jump to  
<  Previous Topic | Next Topic >
Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Site Copyright © 2006-2024 Futuranet Ltd & Martin Lewis
DEFENDER2.NET RSS Feed - All Forums