UHF Duplex Half Duplex ????

No difference in those products

Full duplex means you can send and receive at exactly the same time,
whereas 1/2 duplex means you talk then listen.

The standard house telephone is full duplex, whereas your CB has a press to talk switch hence is only 1 or other (half/duplex).

Or if you like when your arguing with some your both talking and
no-one is listening but I think that is really called no-duplex?

Robin Miller

I haven't looked at their ads, but from definitions;
- Duplex means that you can transmit on one frequency and receive on a different frequency. This allows you to operate through repeaters.
- Half-duplex means that you can transmit or receive, but not both simultaneously
- Full-duplex means that you can transmit and receive simultaneously (as you would with a mobile phone call). I doubt that you would be able to do this on the UHF CB, as these are simply press-to-talk radios, and require much more goodies inside to allow full duplex operation (a duplexor to start with).
Hope this helps
Gerry

Unless you're the pedantic or tech type, don't worry. Both brands fulfil essentially the same role. However GME appear to have a better name among the 4wd frat. The 3400 is a very nice, and reliable, UHF tranceiver.

As Footloose suggests, the techno babble can at times serve no useful purpose - most of us have simply bought a quality UHF radio for travel comms - we use the appropriate channels as per convention (and the law in some cases) and hit the DUPLEX button when we want to use a repeater (again, in appropriate circumstances (a subject for another time probably).

i agree with footloose and darian, i work in comms and full and half duplex in telephone gear is different to u.h.f. meaning.
a telephone which has full duplex can send and receive conversations at the same time.
not to be confused with uhf radios, where duplex refers to sending and receiving on different channels when using a repeater.
most radios brands have duplex, the 3400 is an excellent radio btw

Thanks to everyone for your input.

Looks like I cant go wrong with either models. My main concern was the half duplex but it sounds like that wont make any difference.

Cheers Dave

itsdave
Mate I don't think the choice of Uniden would be a good one,I'm working with CBs all the time and every time I work with a truckie or another Pilot that has a Uniden they are hard to understand and sound distorted, Now of course for sure I will get shot down over that statement but I do ask what brand they have and I always get the same answer "Uniden" And they say it was installed by people they bought it from so it's not an antenna issue,And of course they have no idea what they sound like because they are not on the receiving end,I would certainly recommend the
GME Electrophone TX3400 or the ICOM IC400PRO but the Icom is very confusing radio to use if your not use to them , I have an Icom, as for Half Duplex and Full Duplex I think it is a feature for amature operators ,I've never heard the term for CBs , Duplex is for using the repeaters so I don't see what halves and fulls are going to achieve.

Doug