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uhf and 27 mhz cb

For all things Electrical.

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Posts: 77
Joined: Sun Feb 27, 2005 4:06 pm
Location: hunter valley

uhf and 27 mhz cb

Post by luxinator »

can anyone tell me how good cb's are the 27 mhz ones i already have a uhf but just wanting to know cause the uhf is always banked up with dickheads any info on them would be goo like how far the transmit for and other stuff???
Posts: 135
Joined: Wed Feb 16, 2005 11:50 pm
Location: Western Australia - Margaret River

Post by ToyTruck »

27mhz is where those dickheads learnt thier "skills"

but it can be handy if its cheap ... quite often meet people while offroad who only have 27mhz
[url=http://www.outerlimits4x4.com/PHP_Modules/phpBB2/viewtopic.php?t=40976]ToyTruck[/url] is GONE ..... Time to build a BUGGY
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Location: ingleburn

Post by familybus »

the only good use for 27meg cbs is for chasing what is called skip (talking long distance on side band when conditions are right) and for listening to channel 40 for road repoorts other than that there as usefull as tits on a bull for the simple reason that allmost every man and his dog uses uhf now and with normal 27 meg (HF) to squelch out the interfearance, you also loose half the people on there because of the level of interfearance on hf these days! uhf can be good if set up right and yes the repeaters are very busy some times and full of dickheads playing there powergames and pickin fights but there is alot of good people aswell!
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Joined: Thu Mar 31, 2005 10:17 pm
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Post by Jaffa »

The other thing that familybus didn't mention about 27Mhz CB's ios that they should (and alot of the time do) work better in the hills, your signal wont sound as "nice" as UHF but it will have a hell of alot better chance of getting the transmission over a hill.

BTW. Channel 8 is the road channel on AM CB not Channel 40 (40 is for UHF)
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Joined: Tue Aug 10, 2004 8:36 pm
Location: Sydney

Post by Chookman »

UHF CB radio (approx 470Mhz) is a line of sight device. It works at its best if it has an unobstructed path to the desired destination. ie no mountains etc etc between you and your intended recipient.
Power is another limiting factor for UHF. More power greater distance.
Typically most UHF sets have an output of approx 5watts. Depending on a few variables you may reach a distance of 5km. Some will achieve better results, some worse.
The UHF band has become popular mainly due to its clarity. 27Mhz (HF) on the other hand will out perform UHF in distance and is not as adversly effected by geographical features. However, clarity and signal reproduction is somewhat inferior. Time and money would resolve the problem.
What does it all mean??
1.General wheeling applications - UHF is the go.....repeaters, clear, popular.
2. Extra safety - additional 27Mhz sideband set......noisey but may have the extra bit of distance your after.
3. Got the money - Commercial grade HF radio (ICOM,Scanti, Marconi) for long distance. Will also cover the 27Mhz band if programmed for it. In my opinion mandatory for long distance outback travel.
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