"Telspam Electronics" wrote...
Absolute rubbish...
If you don't have enough freq deviation... you will not get
out well on FM... and your range will be decreased.

Please, Brian, don't try telling a granny how to suck eggs.

We have had FM CB here for many years. So, I talk
not just from the theory, but from knowledge and
experience of FM CB in use and the legal situation
in this country.


Let's make this very simple for you...

Our CBs have a maximum LEGAL deviation.
This maximum is set to stop adjacent channel
interference - which DID occur on a grand
scale when the limit was higher.

UK CB radios are adjusted, and government
tested, to meet that standard.
This includes both deviation and, as the law
requires, the receiver bandwidth.

As these radios are tested before approval,
adding any internal board that alters the power,
frequencies, deviation or any other tested
specification may invalidate the approval and
make the complete radio illegal for use on
the CB band.


I suggest you review
http://en.wikipedia.org/wiki/Frequen...dulation_index
for details.

This coming from someone who, by his own admission,
cannot see how modifying the waveform suggests that
there will be distortion.
lol... lmfao.

I know about FM, modulation index, Bessel function and
sidebands.
I may not flaunt my training, qualifications and experience,
but some of us understand that this is a CB group and leave
such things at the door.

May I suggest that *you* learn a little theory? Maybe a
little on FM sidebands, so that you can see how precarious
the balance is between your notional "talk power" and the
available bandwidth of UK CB channels.

While you are at it, if you intend to target the UK
market, I would suggest that you read up on the
rules and standards.


Bottom line... if you can hold the optimum deviation
level on FM... you will get out better without splattering.

No, the bottom line is that, not only has the cheap method
worked much better on FM CB than a speech processor, it
has long been used in broadcast radio and even sound
recording.


This is extremely effective in a mobile environment.

Did you know that, here in the UK, the worst offenders
for splatter are often the truck drivers? But this could
be about to change, as CADS becomes widespread.

CADS allows the broadcast of any material - including
chanting, singing and music - on the Citizens Band. That,
with it's wide range, high frequencies, etc. is expected
to have quite an impact on splatter.

Giving either of these groups of people one of your
toys can only make matters worse. But what do you
care beyond making a fast Buck? You will not be
the one clearing up any of the mess.


Regards,
Peter.

** NOTE:
The above is not intended as an insult to any
customers or groups. CB enthusiasts only use what
some "rig doctor" or shop sells them.
The blame is clearly with those giving them bad
advice or a "supertune" just to get their money.