Hold off buying a UHF

**waynep** · 3rd June 2010, 08:20 AM

The channels are going from 25KHz bandwidth to 12.5KHZ bandwidth.
The same thing happened in the commercial UHF bands some years ago.

This basically means the receiver IF filtering has to "cut off" at 12.5KHz instead of 25KHz and the transmit deviation ( modulation ) has to be reduced to 2.5KHz instead of 5KHz. There are also other factors that come into the type approval.

If you're buying a new set, make sure it is type approved for 12.5KHz and capable of being re-programmed for the 12.5KHZ channels, when the time comes. I'd be getting a written assurance to this effect from the shop.

Your existing unit, if newish, may be able to be reprogrammed for 12.5KHz bandwidth. You'd need to look at the spec sheet and the programming software to be sure.
Older sets are nearly impossible to convert because of the fixed crystal filters in the receivers.

I can't see how ACMA would be allowing 25KHz sets to continue operating as they would be "splattering" over users on the new 12.5KHz channels.

**land864** · 3rd June 2010, 01:44 PM

A few years back , my old boss told me that his son's UHF ( UHF Only? ) had a facility for RX only of RFS/CFA/Police bands

Did I dream that

What if it had UHF and VHF capability.

**one_iota** · 3rd June 2010, 03:21 PM

Both GME and Icom have models that can be programmed to receive out side the CB band:

http://www.aulro.com/afvb/communicat...0-520-mhz.html

**gmeddy** · 3rd June 2010, 03:43 PM

me and a mate just got ourselves a TX3100 each.
hope they dont go and stuff up the frequencies too soon...

**JDNSW** · 3rd June 2010, 05:21 PM

Originally Posted by waynep

..........
I can't see how ACMA would be allowing 25KHz sets to continue operating as they would be "splattering" over users on the new 12.5KHz channels.

I can't see how they can possibly stop them. A slight possibility they may reduce the numbers of them in the metropolitan areas, but considering the total lack of success in any other controls on the use of them I would not hold my breath. Besides which, ACMA has much more important things to do, like controlling what you can see on the internet.

John

**Shonky** · 4th June 2010, 08:51 AM

So what models of CB are compatible with the new 12kHz spacing?

I have heard that some of the offerings from Icom can be reprogrammed to the new range, but what others are out there?

miky · 5th June 2010, 03:02 AM

Originally Posted by Shonky

I have heard that some of the offerings from Icom can be reprogrammed to the new range, but what others are out there?

GME TX3600 TX3800 etc.

I am sure most of the commercial ones would be OK.

buddha D2 · 19th July 2010, 07:20 AM

UHF CB Australia - News - Repeater Locations - History - Sales & More

Info on 80 channels and upgradable units here.

**CraigE** · 19th July 2010, 12:37 PM

Originally Posted by land864

A few years back , my old boss told me that his son's UHF ( UHF Only? ) had a facility for RX only of RFS/CFA/Police bands

Did I dream that

What if it had UHF and VHF capability.

TAIT actually make a dual band UHF/VHF for emergency services. We had them in our emergency vehicles so we could communicate with FESA, Police and St John. They can also have all public frequencies.

**sclarke** · 19th July 2010, 05:08 PM

OMG i'm going to hold off on the new rig i just bought..... this means more channels..... WOW

bit like the 18 then 21 then 40 channel AM rigs back when i was a wee tacker...

Blah.... if you need a rig in your truck, then get one.... big deal.. upgrade in 5 years time....

mine never last 5 years.... a quick drink, or dust or mud, cures the life span...

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