What is the purpose or what does a tone does in a radio? Can an export radio
(10m converted) be installed a tone? I saw a 10 m hand held, with a 88mhz
tone. Does this helps with reach and transmission to another radio which
has the tone? Can anyone explan a little bit on this?

Alan,
It sounds like you're talking about a CTCSS, or
'tone squelch' accessory. If so, then, no, it doesn't
do anything with range or signal strength. It's just
a way of turning off reception of any signal that doesn't
have the 'tone', sort of like having a private line instead
of a party line with telephones. The tone is like a 'key'
that will open the 'door' to another radio that's using a
'tone squelch' so they don't have to listen to everything
else on a channel.
'Doc

Until it opens; then you hear everything even
those who are not supposed to be on your "private" channle.

The2x4


"'Doc" wrote in message ...


'tone squelch' so they don't have to listen to everything
else on a channel.
'Doc

Alan Lansburger wrote in message ...
What is the purpose or what does a tone does in a radio?


Do you mean the CTCSS tone?
This is like a squelch. It cuts out the sound until someone transmits with
the same tone on their system.


Can an export radio (10m converted) be installed a tone?


You could fit CTCSS on any radio, including CBs.


I saw a 10 m hand held, with a 88mhz tone.


Do you mean 88Hz... 88MHz is not quite a "tone".


Does this helps with reach and transmission to another
radio which has the tone?


It will not improve distance or received sound in any way. All it does is
keep your speaker quiet until the correct person transmits. Unlike a normal
squelch, it is not opened up by any signal above a set strength, it only
opens if the correct tone is received.
The tone transmitted is a low frequency audio signal. The level of this
tone is low enough, so that you will not hear it, but it can still be picked
up by the internal circuits.

This is really intended for services where a frequency is shared by several
people or groups, each of whom wish to use their system privately without
the others bothering them. While it could be fitted on CB, it would just
defeat the object of CB - a "community" type system where anyone can talk to
anyone.




Regards,

Peter.

only if they're keyed up at the same time as someone with the tone
is... otherwise, they go byebye...

-SSB

The2x4 wrote:
Until it opens; then you hear everything even
those who are not supposed to be on your "private" channle.

The2x4


"'Doc" wrote in message ...


'tone squelch' so they don't have to listen to everything
else on a channel.
'Doc

Now, does that mean that there will be silence in the channel until the tone
is heard, and does it work for the entire radio at once, or just for a
specific channel?

"John Bartley K7AAY (ex-KGH2126)" wrote in
message ...
On Tue, 22 Jul 2003 01:01:24 GMT, "Alan Lansburger"
wrote:

What is the purpose or what does a tone does in a radio? Can an export
radio
(10m converted) be installed (with) a tone?

Probably not in a cost-effective manner.

I saw a 10 m hand held, with a 88mhz

88.5 Hz, not mHz

tone. Does this helps with reach

No.

and transmission to another radio which
has the tone? Can anyone explan a little bit on this?

CTCSS (same as Motorola's 'PL') has the xmtr send a subaudible tone.
The receiving radio will not break squelch unless the CTCSS tone is heard.
You can search on the terms above for more info.

--
Nobody but a fool goes into a federal counterrorism operation without duct
tape - Richard Preston, THE COBRA EVENT.

Alan,
Yes, it means that you will hear nothing unless the
sending station is using the tone. Specifically how the
thing will work, single channel or all of them, depends
on how elaborate the 'tone board' is, how much you want
to spend on it, and how you set it up. Normally, it's
"all or nothing", either "on, or off". Unless you have a
definite reason for remotely controling some function
it's just an extra cost option that serves no purpose.
'Doc

"Calex meus inibrians"

Can it be fitted to a specific channel or does it takes all the channels
once it is installed?


"Brainbuster" wrote in message
news:3f1f7f1f.0@entanet...
Alan Lansburger wrote in message ...
What is the purpose or what does a tone does in a radio?


Do you mean the CTCSS tone?
This is like a squelch. It cuts out the sound until someone transmits
with
the same tone on their system.


Can an export radio (10m converted) be installed a tone?


You could fit CTCSS on any radio, including CBs.


I saw a 10 m hand held, with a 88mhz tone.


Do you mean 88Hz... 88MHz is not quite a "tone".


Does this helps with reach and transmission to another
radio which has the tone?


It will not improve distance or received sound in any way. All it does is
keep your speaker quiet until the correct person transmits. Unlike a
normal
squelch, it is not opened up by any signal above a set strength, it only
opens if the correct tone is received.
The tone transmitted is a low frequency audio signal. The level of this
tone is low enough, so that you will not hear it, but it can still be
picked
up by the internal circuits.

This is really intended for services where a frequency is shared by
several
people or groups, each of whom wish to use their system privately without
the others bothering them. While it could be fitted on CB, it would just
defeat the object of CB - a "community" type system where anyone can talk
to
anyone.




Regards,

Peter.

Alan Lansburger wrote in message ...
Can it be fitted to a specific channel or does it takes all the
channels once it is installed?


It is fitted in the audio circuits and has nothing to do with channel, so
will work on all channels.
Although, it can be switchable, so you can use it when you want or switch it
off at any time, on any channel.

Think of it as a squelch. The difference is that a standard squelch will
open up when a signal is strong enough, but the CTCSS will only open up if
they are sending the correct sound. Also, it needs no adjustment - it is
either on or off.


Regards,

Peter.

can anyone else hear you when you reply to someone else that has a ctcss
tone, or just the people who have the tone installed in the radio can hear
each other, sort of like encrypted type comms?

"Brainbuster" wrote in message
news:3f28b75a.0@entanet...
Alan Lansburger wrote in message ...
Can it be fitted to a specific channel or does it takes all the
channels once it is installed?


It is fitted in the audio circuits and has nothing to do with channel, so
will work on all channels.
Although, it can be switchable, so you can use it when you want or switch
it
off at any time, on any channel.

Think of it as a squelch. The difference is that a standard squelch will
open up when a signal is strong enough, but the CTCSS will only open up if
they are sending the correct sound. Also, it needs no adjustment - it is
either on or off.


Regards,

Peter.