What fry's when you blow up your radio?
 

Hey hey,

So, I blew up the frontend on my radio. Opened it up, can't see any
visible damage. When you blow up the radio, any idea what normally goes
on it? The huge honking amp transistor looked fine, and I'll try to
replace that when I can find a boatanchor with a spair, but I'm just
wondering where to concentrate my effort on repairs..

I had previously been testing my radio with a 1.7 SWR on my new
antenna. My radio just dropped all the power, and stopped transmitting
for a while, and then a few minutes later, it started working again,
but I just put out unintelligible noise, although at full power
according to my meter (external).

And no, i wasn't unintelligible cuz i was drunk, I'm pretty sure i was
sober at the time ;)

What fry's when you blow up your radio?
 

So let me get this straight... you say you have a carrier... but no
audio on it?

www.telstar-electronics.com


SparkySKO wrote:
Hey hey,

So, I blew up the frontend on my radio. Opened it up, can't see any
visible damage. When you blow up the radio, any idea what normally goes
on it? The huge honking amp transistor looked fine, and I'll try to
replace that when I can find a boatanchor with a spair, but I'm just
wondering where to concentrate my effort on repairs..

I had previously been testing my radio with a 1.7 SWR on my new
antenna. My radio just dropped all the power, and stopped transmitting
for a while, and then a few minutes later, it started working again,
but I just put out unintelligible noise, although at full power
according to my meter (external).

And no, i wasn't unintelligible cuz i was drunk, I'm pretty sure i was
sober at the time ;)

What fry's when you blow up your radio?
 

Telstar Electronics wrote:
So let me get this straight... you say you have a carrier... but no
audio on it?


Hello,

Yes! I've plugged in a portable radio with headphones, and listen to
myself broadcast on this. It sounds like I have 10 layers of tinfoil
between me and my microphone when I talk, and I get a constant 'buzz'
noise on transmit. This has been tested with an AC-DC power supply,
and also wired straight to a 12V car battery. If I yell REALLY loud,
with my mouth touching the microphone, I am more understandable. When I
key up, other people can hear me, and some of them can understand me,
but they all say that something is wrong with my radio, and that it is
not my microphone.They also report that I am coming in as loud as I do
when I use my working radio. It just kinda sounds like a horrible
kazoo. My SWR shows happy still, and my power output according to my
external meter is what I would consider normal (4 or 5 and swings to 10
or so when I talk).

I've done a visual inspection of the board, and all solder joints
appear fine, and there is no visual 'burn marks' or other tell tale
signs.

This broken radio also receives and does everything 100% normally. It
receives like a champ. This is a single sideband radio by the way. The
radio is also set to AM mode, and I'm certain that every knob and
switch is set to the proper mode.

I do have the full schematics for this radio.

What fry's when you blow up your radio?
 

SparkySKO wrote:
Telstar Electronics wrote:
So let me get this straight... you say you have a carrier... but no
audio on it?


Hello,

Yes! I've plugged in a portable radio with headphones, and listen to
myself broadcast on this. It sounds like I have 10 layers of tinfoil
between me and my microphone when I talk, and I get a constant 'buzz'
noise on transmit. This has been tested with an AC-DC power supply,
and also wired straight to a 12V car battery. If I yell REALLY loud,
with my mouth touching the microphone, I am more understandable. When I
key up, other people can hear me, and some of them can understand me,
but they all say that something is wrong with my radio, and that it is
not my microphone.They also report that I am coming in as loud as I do
when I use my working radio. It just kinda sounds like a horrible
kazoo. My SWR shows happy still, and my power output according to my
external meter is what I would consider normal (4 or 5 and swings to 10
or so when I talk).

I've done a visual inspection of the board, and all solder joints
appear fine, and there is no visual 'burn marks' or other tell tale
signs.

This broken radio also receives and does everything 100% normally. It
receives like a champ. This is a single sideband radio by the way. The
radio is also set to AM mode, and I'm certain that every knob and
switch is set to the proper mode.

I do have the full schematics for this radio.
simple test to sugest find another mike that fits if you can

I am wondering if the fried part is inside your mike or on the curicts
most conected to the mike (how you blew up the mike would be a GOOD
question but who care how you want it fixed right?)

What fry's when you blow up your radio?
 

an old freind wrote:
SparkySKO wrote:

when you said blow you got marqueer all excited!

What fry's when you blow up your radio?
 

wrote:
ceasit and desit you libel please

What fry's when you blow up your radio?
 

wrote:
ceasit and desit your libel please

What fry's when you blow up your radio?
 

"SparkySKO" wrote in
ups.com:


Telstar Electronics wrote:
So let me get this straight... you say you have a carrier... but no
audio on it?


Hello,

Yes! I've plugged in a portable radio with headphones, and listen to
myself broadcast on this. It sounds like I have 10 layers of tinfoil
between me and my microphone when I talk, and I get a constant 'buzz'
noise on transmit. This has been tested with an AC-DC power supply,
and also wired straight to a 12V car battery. If I yell REALLY loud,
with my mouth touching the microphone, I am more understandable. When I
key up, other people can hear me, and some of them can understand me,
but they all say that something is wrong with my radio, and that it is
not my microphone.They also report that I am coming in as loud as I do
when I use my working radio. It just kinda sounds like a horrible
kazoo. My SWR shows happy still, and my power output according to my
external meter is what I would consider normal (4 or 5 and swings to 10
or so when I talk).

I've done a visual inspection of the board, and all solder joints
appear fine, and there is no visual 'burn marks' or other tell tale
signs.

This broken radio also receives and does everything 100% normally. It
receives like a champ. This is a single sideband radio by the way. The
radio is also set to AM mode, and I'm certain that every knob and
switch is set to the proper mode.

I do have the full schematics for this radio.



Have you ever considered maybe getting a different hobby? How about Stamp
Collecting? Many CB'ers find collecting stamps much easier to understand.
The only thing CB'ers make mistakes with in stamp collecting is they lick
the wrong side of the stamp sometimes.

Happy to help. :-)

SC

What fry's when you blow up your radio?
 

Slow Code wrote:
"SparkySKO" wrote in
ups.com:


Telstar Electronics wrote:
So let me get this straight... you say you have a carrier... but no
audio on it?


Hello,

Yes! I've plugged in a portable radio with headphones, and listen to
myself broadcast on this. It sounds like I have 10 layers of tinfoil
between me and my microphone when I talk, and I get a constant 'buzz'
noise on transmit. This has been tested with an AC-DC power supply,
and also wired straight to a 12V car battery. If I yell REALLY loud,
with my mouth touching the microphone, I am more understandable. When I
key up, other people can hear me, and some of them can understand me,
but they all say that something is wrong with my radio, and that it is
not my microphone.They also report that I am coming in as loud as I do
when I use my working radio. It just kinda sounds like a horrible
kazoo. My SWR shows happy still, and my power output according to my
external meter is what I would consider normal (4 or 5 and swings to 10
or so when I talk).

I've done a visual inspection of the board, and all solder joints
appear fine, and there is no visual 'burn marks' or other tell tale
signs.

This broken radio also receives and does everything 100% normally. It
receives like a champ. This is a single sideband radio by the way. The
radio is also set to AM mode, and I'm certain that every knob and
switch is set to the proper mode.

I do have the full schematics for this radio.



Have you ever considered maybe getting a different hobby?
have you ever considered another hobby?

you seem to hate most of the people in your choosen hobby

What fry's when you blow up your radio?
 

"SparkySKO" wrote in message
ups.com...

Telstar Electronics wrote:
So let me get this straight... you say you have a carrier... but no
audio on it?


Hello,

Yes! I've plugged in a portable radio with headphones, and listen to
myself broadcast on this. It sounds like I have 10 layers of tinfoil
between me and my microphone when I talk, and I get a constant 'buzz'
noise on transmit. This has been tested with an AC-DC power supply,
and also wired straight to a 12V car battery. If I yell REALLY loud,
with my mouth touching the microphone, I am more understandable. When I
key up, other people can hear me, and some of them can understand me,
but they all say that something is wrong with my radio, and that it is
not my microphone.They also report that I am coming in as loud as I do
when I use my working radio. It just kinda sounds like a horrible
kazoo. My SWR shows happy still, and my power output according to my
external meter is what I would consider normal (4 or 5 and swings to 10
or so when I talk).

I've done a visual inspection of the board, and all solder joints
appear fine, and there is no visual 'burn marks' or other tell tale
signs.

This broken radio also receives and does everything 100% normally. It
receives like a champ. This is a single sideband radio by the way. The
radio is also set to AM mode, and I'm certain that every knob and
switch is set to the proper mode.

I do have the full schematics for this radio.


Has the radio ever been worked on such as a tune-up? Could be that some hack
messed up the audio output. Look for such things as missing or clipped
diodes and transistors. The best thing to do is to find an oscilloscope so
you can see what's going on.

Morkie: Seek An English Tutor, Idiot
 

an old freind wrote:
wrote:
ceasit and desit your libel please

"CEASE" and "DESIST" your abuse of the English language, Mork.

Steve, K4YZ

What fry's when you blow up your radio?
 

Do you you have electronic test equipment?


"SparkySKO" wrote in message
oups.com...
Hey hey,

So, I blew up the frontend on my radio. Opened it up, can't see any
visible damage. When you blow up the radio, any idea what normally goes
on it? The huge honking amp transistor looked fine, and I'll try to
replace that when I can find a boatanchor with a spair, but I'm just
wondering where to concentrate my effort on repairs..

I had previously been testing my radio with a 1.7 SWR on my new
antenna. My radio just dropped all the power, and stopped transmitting
for a while, and then a few minutes later, it started working again,
but I just put out unintelligible noise, although at full power
according to my meter (external).

And no, i wasn't unintelligible cuz i was drunk, I'm pretty sure i was
sober at the time ;)

What fry's when you blow up your radio?
 

GHB wrote:
Do you you have electronic test equipment?

Not really. I have a friend who might have some equipment. Multimeter
is easy enough to come across. Oscilliscope, no.

Funny that I don't have personal access to test equipment, I work in
one of the most state of the art RF labs in the world with equipment
galore, but I couldn't sneak in anything to test on. Nor does anyone
know a darn about my plight.

The radio AFAIK did work fine for a while. So I don't think this is
entirely a mod. It doesn't look modified,

Funny, I couldn't TX yesterday until i toggled the PA switch (i mashed
a bunch of other buttons, but this one finally did it). Although the
radio wasn't in PA mode.

I was just asking on here so that someone could kinda point me in the
right direction to look at.

What fry's when you blow up your radio?
 

Telstar Electronics wrote:
Constant buzz... horrible kazoo. Sounds like your audio is oscillating.
What mic are you using? What mods are present in this radio?

I appreciate your time :)

I'm using the stock uniden mike. It's a dynamic microphone. I put it on
my Cobra, and listened to the audio quality, and it was fine. I haven't
had luck getting my cobra mic working on this uniden however :( , but
the audio quality is the same with both mic's. I took it apart, and I'm
not sure if someone fiddled with it, a wire was twisted together, but
poking around didn't change anything.

What mods are present on this radio? As far as I know, it's stock. I
bought it used about a month ago from a trucker who stopped trucking.

What fry's when you blow up your radio?
 

Well... it could be many things in the audio chain. Probably the most
likely is the audio output device. Not sure exactly what that is in
your rig... but most take the form of a IC that is normally attached to
the aluminum chassis to sink the heat away.

www.telstar-electronics.com


SparkySKO wrote:
I'm using the stock uniden mike. It's a dynamic microphone. I put it on
my Cobra, and listened to the audio quality, and it was fine. I haven't
had luck getting my cobra mic working on this uniden however :( , but
the audio quality is the same with both mic's. I took it apart, and I'm
not sure if someone fiddled with it, a wire was twisted together, but
poking around didn't change anything.

What mods are present on this radio? As far as I know, it's stock. I
bought it used about a month ago from a trucker who stopped trucking.

What fry's when you blow up your radio?
 

"SparkySKO" wrote in
oups.com:


GHB wrote:
Do you you have electronic test equipment?

Not really. I have a friend who might have some equipment. Multimeter
is easy enough to come across. Oscilliscope, no.

Funny that I don't have personal access to test equipment, I work in
one of the most state of the art RF labs in the world with equipment
galore, but I couldn't sneak in anything to test on. Nor does anyone
know a darn about my plight.

The radio AFAIK did work fine for a while. So I don't think this is
entirely a mod. It doesn't look modified,

Funny, I couldn't TX yesterday until i toggled the PA switch (i mashed
a bunch of other buttons, but this one finally did it). Although the
radio wasn't in PA mode.

I was just asking on here so that someone could kinda point me in the
right direction to look at.



CB radios are disposable, just throw it away and buy another one, or try
stamp collecting.

SC

What fry's when you blow up your radio?
 

On 11 Aug 2006 10:42:37 -0700, "SparkySKO" wrote
in . com:

snip
What mods are present on this radio? As far as I know, it's stock. I
bought it used about a month ago from a trucker who stopped trucking.


If a trucker owned it then it's hard telling how bad it's messed up.
CB radios are cheap, just go buy yourself a new one. Or buy a bunch of
used radios and go through them until you find one that works.

What fry's when you blow up your radio?
 

"SparkySKO" wrote in message
ups.com...
Telstar Electronics wrote:
Constant buzz... horrible kazoo. Sounds like your audio is oscillating.
What mic are you using? What mods are present in this radio?

I appreciate your time :)

I'm using the stock uniden mike. It's a dynamic microphone. I put it on
my Cobra, and listened to the audio quality, and it was fine. I haven't
had luck getting my cobra mic working on this uniden however :( , but
the audio quality is the same with both mic's. I took it apart, and I'm
not sure if someone fiddled with it, a wire was twisted together, but
poking around didn't change anything.

What mods are present on this radio? As far as I know, it's stock. I
bought it used about a month ago from a trucker who stopped trucking.


If you bought it used from a trucker it probably has been screwdrivered. You
need to take it to a competent tech and have it checked out.