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Hearing only one end not the other

Posted: Sat Dec 31, 2005 3:59 pm
by stevesperformance
:? Once in a while when i'm listening to the cops i only one end and not the other.What's going on here.

Posted: Sat Dec 31, 2005 5:11 pm
by WPXZBP
G'day stevesperformance - I find the same thing listening to the wheatbelt police. From what I understand there is a central point (Northam in my case) and several different "branches" to the network so the local coppers (eg Jurien) don't hear what's going on in other parts of the network coverage (for example Cunderdin) Maybe they have the same system there.

If I'm wrong I'm sure someone will take great pleasure in correcting me. :P

Posted: Sat Dec 31, 2005 5:19 pm
by vk6hgr
Also, the police radios can be set to a mode that transmits direct car to car and not through the repeater.

Usually called repeater talk around, simplex or local mode. If a car operating on simplex is close to you you'll hear him talking but might not hear the other car. VKI usually can't hear cars when they're on simplex.

Posted: Sat Dec 31, 2005 5:24 pm
by stevesperformance
When it happens its usually the car that i can't heard but can heard the base.

Posted: Sun Jan 01, 2006 8:13 pm
by wayne
The Coppers here in Bunbury use simplex quite often in the CBD between themselves or to the Base, i can usually hear most of their transmissions althought alot noisier, they seem to use simplex when they are on foot walking around town.

Been getting strange full signal hash sounding transmissions here in Bunbury on 469.225 Khz maybe testing digital channel or something ?

Also whats new VKI listing on 506.825 Mhz ?

Posted: Sun Jan 01, 2006 8:15 pm
by vk6hgr
wayne wrote:
Also whats new VKI listing on 506.825 Mhz ?
That's about where the new digital system is going to be:

http://vk6hgr.echidna.id.au/phpbb/viewtopic.php?t=416

Posted: Fri Jan 06, 2006 11:21 am
by JG-103
U sometime dont hear the other end cause they are on another channel that goes to the one person, like with the fire brigade, someone might be speaking to 6AR on one channel but we can only hear 6Ar speakin to em on the channel we are using

Posted: Fri Jan 06, 2006 4:21 pm
by stevesperformance
thats what i though but i have tried scan all 64 channels when it happens but still can't heard the other end.

Posted: Sun Jan 08, 2006 9:31 pm
by JG-103
got me beat JG103 :P

Posted: Sun Jan 08, 2006 9:35 pm
by vk6hgr
stevesperformance wrote:thats what i though but i have tried scan all 64 channels when it happens but still can't heard the other end.
I reckon you're hearing car to car chat and you're just out of range. VKI don't do split channel stuff like FESA do.

Posted: Sun Jan 08, 2006 10:42 pm
by Steve
This happened to me last night: I was able to hear VKI on channel 25 talking to a country unit (don't know if it was a vehicle or a station) and I was only able to hear VKI and not the responding unit.

It may be because during quiet periods, a number of country channels with links back to VKI are combined, and the VKI signal goes out on several repeaters simultaneously, but not all the repeaters are activated when a country unit responds.

Posted: Sun Jan 08, 2006 11:47 pm
by vk6hgr
Steve wrote: It may be because during quiet periods, a number of country channels with links back to VKI are combined, and the VKI signal goes out on several repeaters simultaneously, but not all the repeaters are activated when a country unit responds.
Listen on channel 55 sometimes, they link it like that quite often. Makes it hard to figure out what channel a vehicle is actually using...