Cobra 148gtl off frequency on sideband transmit

The Modulation adjustment is VR5, or you can cut D9, though I do not recommend completely disabling the AMC circuit. If VR5 does not have enough range, lift the banded end of D9 & solder a 1K-ohm resistor in series with the diode, then adjust for 100% modulation or to where the AMC circuit just starts to limit modulation.

Check the Mic. Sideband you can talk up. ie the louder you are the more mod.

My radio 148gtl d has low modulation

Try this Support Cobra Electronics Corporation

http://www.cbtricks.com/

1audio. 1red
2shield. 2shield
3receive. 3blue
4switching. 4white
5transmit. 5black

Hope this helps

I'll bet that the A.W.I. is out of adjustment. give it a little twitch of a turn and see if the red light goes out.

Did you have your radio "peaked?" If you turn a Cobra Sideband radio up to much it may be great for the AM side but can crush the Sideband side. Make sure it is on frequency too. Use a frequency counter to check. Make sure your SWR is 1-1:5 and no higher than two. You may have to take it to a tech and have them but it on a scope.

im not sure carriers are measured in pounds, but SSB is a supressed carrier mode, in SSB only one sideband is transmitted and the carrier is inserted at the other end in the receiver. In AM mode the carried and both sidebands are transmitted. with regular am there is a carried and when modulation (your voice) is added a signal appears both above and below the carrier frequency at a distance relative to the frequency of your voice. so if you have a carrier at 1000 khz and modulated it with a tone of 100 hertz the signal will contain frequencies of 900,1000, and 1100 hertz, then its changed to SSB by supressing the carrier (1000) and one sideband (1100) if you are on lower sideband and (900) if you one upper sideband, and transmits the remaining frequency.

seems to me that the audio ic of the cobra 148gtl brokedue sudden change of voltage from power suplly or flactuation. ta7222p