OK, so I have a Cobra DXIII CB installed in my truck.

http://techshop.earthlink.net/p20805:S1151622

It has always seemed to work fine in CB mode.

I bought one of these PA horns to mount under the hood to use as a PA
speaker.

http://butleroutdoorstore.com/index....OD&ProdID=1433

Both the CB and the PA horn have the usual standard mini jacks on them.
Trouble is, when I try to use it, all I get is a horrible piercing
feedback whine when I press the mic.

At first I thought there was something wrong with the speaker, but when
I plug it into the external speaker jack of the CB, it works fine as an
external speaker. It even worked when I plugged my Ipod headphone jack
into it. So there can't be anything wrong with the speaker.

So then I assumed it was my CB that was broke. My dad has the identical
model CB, so I tried his out and it did the exact same thing. (terrible
whine in PA mode)

So either the Cobra DXIII doesn't work as a PA system, or I am missing
something simple.

I didn't have the speaker anywhere near the mic, so it's not like it
was picking up feedback through that.

Anyone ever hear of this happening?

wrote in message
ups.com...

Both the CB and the PA horn have the usual standard mini jacks on them.
Trouble is, when I try to use it, all I get is a horrible piercing
feedback whine when I press the mic.

So either the Cobra DXIII doesn't work as a PA system, or I am missing
something simple.

I didn't have the speaker anywhere near the mic, so it's not like it
was picking up feedback through that.



That is exactly what is happening... With the unit set to PA, turn the
volume on the CB all the way down to nothing, and key the mike... Bet the
squeal is gone... Now turn up the volume to just where is starts to squeal,
then back it down just a little. That point is as loud as you will be able
to get the PA...

PowerHouse Communications wrote:
wrote in message
ups.com...

Both the CB and the PA horn have the usual standard mini jacks on them.
Trouble is, when I try to use it, all I get is a horrible piercing
feedback whine when I press the mic.

So either the Cobra DXIII doesn't work as a PA system, or I am missing
something simple.

I didn't have the speaker anywhere near the mic, so it's not like it
was picking up feedback through that.



That is exactly what is happening... With the unit set to PA, turn the
volume on the CB all the way down to nothing, and key the mike... Bet the
squeal is gone... Now turn up the volume to just where is starts to squeal,
then back it down just a little. That point is as loud as you will be able
to get the PA...

I should have mentioned in my original post that even with the volume
turned all the way down to the lowest it will go (without shutting the
CB off completely) it still produces the same exact whining noise at
the same ear-piercing decibel level the instant I key the mic.

The volume control doesn't seem to have any effect on it whatsoever.

wrote in message
oups.com...

PowerHouse Communications wrote:
wrote in message
ups.com...

Both the CB and the PA horn have the usual standard mini jacks on
them.
Trouble is, when I try to use it, all I get is a horrible piercing
feedback whine when I press the mic.

So either the Cobra DXIII doesn't work as a PA system, or I am missing
something simple.

I didn't have the speaker anywhere near the mic, so it's not like it
was picking up feedback through that.



That is exactly what is happening... With the unit set to PA, turn the
volume on the CB all the way down to nothing, and key the mike... Bet
the
squeal is gone... Now turn up the volume to just where is starts to
squeal,
then back it down just a little. That point is as loud as you will be
able
to get the PA...

I should have mentioned in my original post that even with the volume
turned all the way down to the lowest it will go (without shutting the
CB off completely) it still produces the same exact whining noise at
the same ear-piercing decibel level the instant I key the mic.

The volume control doesn't seem to have any effect on it whatsoever.


OK... This is a long shot, but if you have a pair of headphones with the
mini-plug, try plugging that into the PA jack on the radio. Key it and see
if it still squeals. Keep the mike away from the headphones, and don't wear
them! Might go deaf if it does squeal... Try adjusting with the volume
with the headphones attached...

One other thought... It is the stock mike? Power mikes don't work so well
with PA systems...

wrote in message
oups.com...

PowerHouse Communications wrote:
wrote in message
ups.com...

Both the CB and the PA horn have the usual standard mini jacks on them.
Trouble is, when I try to use it, all I get is a horrible piercing
feedback whine when I press the mic.

So either the Cobra DXIII doesn't work as a PA system, or I am missing
something simple.

I didn't have the speaker anywhere near the mic, so it's not like it
was picking up feedback through that.



That is exactly what is happening... With the unit set to PA, turn the
volume on the CB all the way down to nothing, and key the mike... Bet
the
squeal is gone... Now turn up the volume to just where is starts to
squeal,
then back it down just a little. That point is as loud as you will be
able
to get the PA...

I should have mentioned in my original post that even with the volume
turned all the way down to the lowest it will go (without shutting the
CB off completely) it still produces the same exact whining noise at
the same ear-piercing decibel level the instant I key the mic.

The volume control doesn't seem to have any effect on it whatsoever.

If you have a mic gain knob, turn it down.

Interesting! Most likely there is way too much Mic gain.

Question? Why has it been since CB started, there is a PA on them anyway, no
other radio, Ham ,Marine or Aircraft had it, oh yes that's funny a pilot
talking over a PA system.


"DrDeath" wrote in message
...
wrote in message
oups.com...

PowerHouse Communications wrote:
wrote in message
ups.com...

Both the CB and the PA horn have the usual standard mini jacks on
them.
Trouble is, when I try to use it, all I get is a horrible piercing
feedback whine when I press the mic.

So either the Cobra DXIII doesn't work as a PA system, or I am missing
something simple.

I didn't have the speaker anywhere near the mic, so it's not like it
was picking up feedback through that.



That is exactly what is happening... With the unit set to PA, turn the
volume on the CB all the way down to nothing, and key the mike... Bet
the
squeal is gone... Now turn up the volume to just where is starts to
squeal,
then back it down just a little. That point is as loud as you will be
able
to get the PA...

I should have mentioned in my original post that even with the volume
turned all the way down to the lowest it will go (without shutting the
CB off completely) it still produces the same exact whining noise at
the same ear-piercing decibel level the instant I key the mic.

The volume control doesn't seem to have any effect on it whatsoever.

If you have a mic gain knob, turn it down.

DrDeath wrote:

If you have a mic gain knob, turn it down.

Unfortunately there is no gain knob. I asked a few other places and
some other people thought I might be using a powered mic as well. That
is not the case, as the only place to adjust the volume is right on the
CB itself.

I will try the earphone thing previously mentioned to see if I can
eliminate the speaker as the culprit. A friend also has a higher
quality Cobra CB, I will maybe just try the speaker with his to see if
it has the same effect.

Thanks guys.

"JSF" wrote in message
. ..
Interesting! Most likely there is way too much Mic gain.

Question? Why has it been since CB started, there is a PA on them anyway,
no other radio, Ham ,Marine or Aircraft had it, oh yes that's funny a
pilot talking over a PA system.

We were discussing that in another thread. Even on the cheapest units on the
market they always have a PA setup. You would think they would want to save
a few pennies per unit not to have it. But the switch comes in handy for
many other things.

wrote in
ups.com:

OK, so I have a Cobra DXIII CB installed in my truck.

http://techshop.earthlink.net/p20805:S1151622

It has always seemed to work fine in CB mode.

I bought one of these PA horns to mount under the hood to use as a PA
speaker.

http://butleroutdoorstore.com/index....OD&ProdID=1433

Both the CB and the PA horn have the usual standard mini jacks on them.
Trouble is, when I try to use it, all I get is a horrible piercing
feedback whine when I press the mic.

At first I thought there was something wrong with the speaker, but when
I plug it into the external speaker jack of the CB, it works fine as an
external speaker. It even worked when I plugged my Ipod headphone jack
into it. So there can't be anything wrong with the speaker.

So then I assumed it was my CB that was broke. My dad has the identical
model CB, so I tried his out and it did the exact same thing. (terrible
whine in PA mode)

So either the Cobra DXIII doesn't work as a PA system, or I am missing
something simple.

I didn't have the speaker anywhere near the mic, so it's not like it
was picking up feedback through that.

Anyone ever hear of this happening?



I hope you get it working, the gay parade needs a grand marshal.

Sc

Slow Code wrote:
wrote in
ups.com:



I hope you get it working, the gay parade needs a grand marshal.
more of your proven gay bashing bull**** showing what you are

Sc