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When i key it up to talk i dont see no meter swing at all

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What are you keying up? what are you trying to meter

Posted on Sep 11, 2010

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My connex 3300 wont transmit anymore and the talk back wont work either,i have tried a different mike and when you key it up the meter still won't swing.


Plug in an external speaker to the pa jack ... Switch the band selector to pa and see if you hear yourself... No? Bad audio chip

Dec 29, 2010 | Connex 3300 240-Channels Base CB Radio

1 Answer

Galaxy saturn tubro 100 watt power is sticking after key up.


Not sure what you mean completely. If you mean, when you key up, it keys at 100 watts and stays, then this is probably not a problem.

If it doesn't swing, it is either the watt meter you are using, or you have the power up too high, or both.

I usually key my saturn turbo around 80 watts. You have to be careful with these radios. they get hot fast and when they do, they get whacky. Make sure you have a PC fan plowing on the heat sink on the back.

The higher the dead key, the less swing you will see.

Now as for the watt meter....

There are a few types of meters out there. The 2 most common are ones that read AVG, or average watts, or PEP or Peak envelope power, which in short terms is your Peak wattage. Some meters do both.

An AVG meter will not read peak wattage, or swing. So if you meter is an AVG meter, or is set to AVG, then it will not read swing, and will show you your dead key, and that's it. Some times the needle will move a little, but it is not showing your true swing.

All in all a PEP meter is a loose representation any way, because you really cannot get an accurate reading when there is modulation. But it's close enough. You would need a spectrum analyzer to really see what you are putting out with modulation. AVG with no modulation is a more accurate reading however you cannot see swing.

Now PEP while transmitting in SSB with modulation, would be accurate. Just not AM, but like I said, its close enough and is what every one goes by.

I don't know if your Saturn turbo has been modded or peaked and tuned but, you should see a max of about 170 to 200 watts swing on that radio if its been done right. But you will need a PEP reading meter to see that.

I wouldn't run it past 80 watt dead key for long. With that radio you should really only run what you need. For instance, when I am using mine, I start at around 70--80 watts, and do a check, and if it's not strong enough I bring it up a little, until the audio sounds good to who I am talking too.

Like I said, you have to keep it from getting too hot.

Nov 04, 2010 | Radio Communications

1 Answer

Tell me how to turn the raido power down to 1 watt so i can hook up my 350 watt liener? i need to find the schmatics so i can find the right knob to twist


There are no knobs for AM power in the cobra 29 LTD. Soldering 2 parts inside the radio is needed to do this. If you are not comfortable with soldering inside of the radio, take it to a technician.If you feel you are up to it, here is how you to do it.

First make sure VR4 is all the way to the left. This will turn your modulation to full and will make your audio louder.

Next you will need a 220 uf 35 volt capacitor and a 1/2 watt 100 ohm resistor.

Now remove JP36. It is located right in front of the final transistor in the back right that is bolted to the heat sink.

put the capacitor in its place with the black tab facing the back of the radio.( this is most improtant because if you don't face it the right way you will blow your radio). Solder it in place.

Next on the trace side of the board, where all the solder joints are, solder the resistor to the spots where the cap was soldered. So the resistor is in between the 2 points of the capacitor.

Now your dead key will be at 2 watts. Now, you did say you wanted 1 watt. From my experience, 1 watt is not enough. you will under drive the box and blow the pills in it.

If in fact you do need only 1 watt, you have to play with what size resistor you put on it. if you increase the value of the resistor, you will get a lower dead key. If you lessen it, it will make the dead key higher. Get a multi pack of 1/2 watt resistors if your going to do this.

BUT** 2 watts should be what you need.

So you know. There are 2 types of wattage outputs in an AM radio. There is carrier signal or dead key, and then there is modulation or swing.

Your radio is going to do 2 watts of a carrier signal or dead key, and when you talk the meter will swing up when you talk if you have peak reading meter. it it only reads average, it will only show your dead key with only a swing of about 4-5 watts.

For low drive amplifiers, the dead key is usually all that needs to be set. The swing should be turned up (thats why you turn VR4 all the way to the left) witch will give you just over 20 watts swing. this will drive the box good. Any where between 20 and 35 watts will dive most boxes good.

GOOD LUCK!!

Oct 09, 2009 | Cobra 29 LTD CB Radio

2 Answers

Cb is Keying Down instead of keying up when trying to talk


if you are transmitting fine Don't worry about the meter. Get an external SWR meter, they are better anyway.

Also, make sure the the switch next to the meter is all the way up on s/rf setting. thats for signal power and receive strength.

Aug 30, 2009 | Cobra 29 WX NW ST 40-Channels Base CB...

1 Answer

Low output power


On the meter you are using, does it mesure Average power or peak envelope power?

This is very important to know when you are measuring.

AVG measures basically your dead key. It usually will very little if at all.

PEP measures your peak output, or swing. Modulation.

So even if you have a radio that has been peaked, on a meter that reads AVG, it will still read around 3 to 4 watts. And, if it has a swing kit in it, it will read even less. A swing kit lowers the dead key it increase modulation. Higher PEP.

For example. I peaked my cobra 29 and it does some where around 22 -25 watts PEP. I have variable power in it as well, but usually run the dead key at 2 watts because I have a linear. The Radio alone, when mesureing on PEP with key up at 2 watts, and then when you talk, swings to about 22 -25 watts.

If I flip the meter to AVG, it stays at 2 watts even with talking.

If you have one of those cheap pyramid meters, etc, they usually only read AVG.

Get a meter from radioshack. They have a fairly decent radio for the money. It reads both PEP and AVG and has SWR as well.

If the radio has been peaked and it has a swing mod, it will most likely be swinging to some where in the 20 watt range.

On a side note. According to FCC regulations, a CB radio is only allowed to transmit with 4 watts of final power. Most times the manufacturer will have it a hair under so that they are leagal.

Basically it is illegal to use a CB that puts out more then 4 Watts.

But its a free for all these days. There is no more funding to the FCC for monitoring CB radio, so they do not want anything to do with it. As long as you don't over do it, have over 50000 watts and terrorize a small community with RF, you can do what you want.

Now a days most cb radio's bought have already been peaked if you got it from a cb shop, or off a website that does it.

Apr 21, 2009 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

I can hear people talking, but they can't hear me, or they say I sound like an alien


Check to see if the meter needle is swinging backwards when you key up. If it does your final may be bad. If the needle goes forward and others say they see your keying up but no sound your audio chip may be bad; especially if you have tried so many mics and antennas. If your radio has a swr warning light and it comes on this could extremely limit your range and others may not hear you and contiued use will damage your radio. Good luck!!!

Jul 26, 2008 | Cobra 29 LTD CB Radio

2 Answers

Uniden pc68xl


Since this is illegal to do I can't instruct on this matter, but you might do a search on cb sam website. good luck
Ed
NC Electronic
Mills, Wyoming

Nov 08, 2007 | Uniden PC68XL (40 Channels) 2-Way Radio

1 Answer

No transmitt,Key up and meter pegs out.


The problem is the audio output chip. the number of this chip is TA7222AP, have this chip replaced and it will solve your problem. If you need futher info contact me at : outlaws_cb_shop@yahoo.com

Sep 09, 2007 | Cobra 29 LTD CB Radio

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