Master
Today I decided to remove my 40ch UHF from my D2 into the D4. Originally I was going to sell the D2 with the UHF in it and buy a new 80ch with the buttons on the mic. When I thought about it I decided the extra channels weren't that neccesary for the amount I use it, my mates mostly have 40ch units, I wasn't going to make anuthing extra on the sale of the D2 with the UHF in it and saved outlaying again for a new unit.
I used this thread from Sniegy for alot of the install but customised to suit my needs http://www.aulro.com/afvb/d3-d4-rrs/...0-install.html
So here are some pics for those interested.
The base unit went under the drivers seat attached to the metal frame that surrounds the amplifier. This had to be removed from under the seat to do it.
I contiplated for a long time where to mount the remote face unit. Although it isn't perfect I came to the conclusion on this panel was the best compromise. I can still get tall bottles into the cup holders (just) and easily access the cubby box. The piece of trim it's mounted on is easily removed. If I decide to remove or upgrade the UHF down the track this is the only thing I will have to replace. I'm also considering getting another trim now and attach the one with the remote face only when needed.
Power is run up to the power sources as per Sniegy's thread. I haven't terminated it yet. A mate of my brother is doing it for me tomorrow. I have the option of powering it via an accessories source or aux battery source and am in 2 minds about it.
Aerial has gone on the outside mount on my Opposite Lock bar. It runs back to the firewall, across to the access grommit near the steering column, down the centre consol and under the seat to the base unit. This will be terminated tomorrow too. I only just get under the garage door in normal road height.
At this stage I haven't mounted the mic holder. The mic just sits in the cubby box until it needs to be used then rests in the cup holder until I'm finished with it. At some point I'll bite the bullet and put it somewhere on the centre console. No need to rush these things.
Hope that's informative to someone.
Matt.
Master
Great!
Only negative thing I suppose is that whilst your mates might have 40 channel and you "don't need 80" you may be forgetting that they will become non compliant and you will need to upgrade anyway.
Might save you money, but so everyone knows 80 is the way forward.
Wizard
Originally Posted by adzee
Great!
Only negative thing I suppose is that whilst your mates might have 40 channel and you "don't need 80" you may be forgetting that they will become non compliant and you will need to upgrade anyway.
Might save you money, but so everyone knows 80 is the way forward.
Please Explain
Master
http://www.uhfcb.com.au/UHF-CB-Changes.php
Sorry not non compliant, but interferes... But if you end up in convoys you will be seeing 80 channels become more frequent subsequently disrupting their use. Just a thought.
Master
Thanks for the comment as I didn't realise this. I spoke with GME who said that communication from a 40ch to a 80ch would come out soft in volume and the other way would come out louder (or vice versa). At least communication can still happen, but as you say would be disruptive to some degree.
I guess I will run with what I have until I find the need to upgrade. At least the GME TX3520 (80ch model of my current one) will swap straight in to the cradle for both the base and remote head unit. I'll still be able to use the aerial and power source which are the fiddley parts to install. Will only be a 5 minute job to install the upgrade, so not a total waste of time.
It's a shame there will be so many redundant 40ch units in the coming years but I guess that's progress, you can't stop it.
Matt.
ForumSage
Really don't know where they come up with this rubbish - other than it's just aimed at trying to convince everyone that they need to buy a new radio from them.
I have an 80 channel Uniden in my D4. My old GME 40 channel is still in the D2 which my son now owns (and I also have another 40 channel GME mounted in my shed).
There is absolutely no problem at all in communications between the 40 / 80 channel radios. One does not come out softer or louder on the other.
They'll tell you anything to try to make a sale.
Only reason that I bought the 80 channel was because I wanted a radio with controls on the Mic for the D4 as nowhere that I am keen on to mount a conventional unit in there. While I've had GME radios for years, have used the GME offering with controls on the Mic in work and hire vehicles - and their handpiece is crap - the Uniden is a much better unit in this respect.
Cheers .........
BMKAL
Master
My understanding of the interference that occurs is due to the way the bands share the same frequencies and they cross over or something. I don't understand it all either, but I have a commercial grade UHF which can be programmed for the old 40, and used as an 80 channel.
TBH - I wish I still had my simple uniden unit... This one has too many functions and things that can be changed! But got it for a ripper price.
Swaggie
No, the new channels use a frequency mid-point between each of the older channels.
MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
VK2HFG and APRS W1 digi, RTK base station using LoRa
ForumSage
Not the case at all.
Under the new system, there will be REPEATERS which will operate between some of the allocated channel frequencies. The channel frequencies themselves will remain unchanged.
The main difference is that the new 80 channel radios operate on a "tighter" bandwidth for each channel than the older 40 channel units. All simplex voice channels will transition to 12.5 kHz bandwidth, with new repeater channels created in the space between the existing channels.
Older 40 channel radios use the same frequencies, but operate on a 25kHz bandwidth - with this system, there is not sufficient "space" between the channels to establish the new repeater channels.
It will eventually become illegal to continue to use an older 40 channel UHF radio in Australia, because it does not transmit within the allowable bandwidth (maximum allowed bandwidth is now 16kHz). However, ACMA has allowed a six year "phasing in" period for these new rules to take effect and to allow people to upgrade their equipment.
However, even at the end of this 6 year "phasing in" period - their ability to police the new rules is highly questionable, given track record in policing "citizens band" radio use in Australia to date.
Cheers .........
BMKAL
Swaggie
If old equipment stays within +/- 6.25kHz of the nominal frequency then there wont be any interference but because the regulations allowed +/- 12.5 kHz then the old equipment may indeed cause interference with the new adjacent channel, whether that be a new repeater or new simplex channel. Nonetheless new channels have been allocated with frequencies mid-point between the older channel (nominal) frequencies rather than on the same frequencies.
MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
VK2HFG and APRS W1 digi, RTK base station using LoRa
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