Why is a dead key on ssb when mic is keyed down?

You have a cold solder connection or dirty contacts in the relay.. key the radio and tap the radio... if the carrier goes away its a solder connection.

sounds like a repair for a tech to me.

export radios rx without a mic. so its an issue in the radio.
will the PA function work?
and will the meter move.
will the green rx led change to red when you key?

hi

it looks like the output stage is going hot (99%)

maby the swr is high end eficiancy is low

usualy on ssb the power is higher than on am


bernard




http://www.rylwy.com/

Check C-144, c-149, c-153, c-154 using an ESR meter.

Hi, my name is John. Adjust the radio to key 1 watt, then switch to SSB on radio,then switch to SSB on amp, key down and adjust to 1 watt on amp. enjoy !!!!!! ...hope this was very helpful....

What radio?? Does it have single side band(SSB)? If not, then don't use SSB.

AM - amplitude modulation
SSB - single side band.

If you have SSB, there would be a switch on it to transmit in SSB. If not, it is AM only.

Second, Has this radio been worked on to be able to run on an amp? If not, you will blow the amp.

A CB radio transmits dead keys with 4 watts of power, and transmits with 4 watts of audio.

a 4 watt dead key is too much for a linear amp. You will smoke the transistors. Also, 4 watts of audio is not enough to drive it properly. You won't get full power.

The dead key needs to be around 2 to 2 -1/2 watts,or what ever makes the linear dead key half its peak wattage., and the modulation (audio) turned up all the way.

It doesn't sound like you know too much about CB radio's. Not a big deal, you can learn. For right now you may want to take it to a cb shop and tell them you want a peak and tune, and set up to run a linear.

You can find CB shops usually at truck stops. Some area's they are other places. Check the internet for local shops.

Try pulling the mic out to see if it stops if it does you have a problem in the mic if not it
is inside the radio.
Good luck

if you are talking on SSB then their is never a dead key wattage.
SSB uses all modulation, no dead key.

First off check to see if your mic gain is turned all the way down. Second; if you have a power mic is the battery dead ir the volume of the mic turned down. If these check ok, look for a loose or broken audio wire in your microphone, and the connector (both ends can break). I have seen the wires break as far back as 4 inches from the mic head and the connector depending on how the user held the microphone, or pulled against the wire. if the problem is not found to be any of the above I suggest you take the radio to a qualified technician for repair.