20 Most Recent Superstar SS-121 120-Channels Base CB Radio Questions & Answers

Some people say cut off or jump the mod regulator on the circuit board. It would be better to get the specs on the circuit and using a small to screw driver (with power off) to turn it up counter clockwise all the way. It is factory set at 50 to 90% modulation. I would not turn it up all the way unless the radio has a mic power output adjustment on the panel. This way if you go "over mod" you can cut back the power. Many "S" meters will also show modulation so you can see if it is too high (into the red). Check for response to modulation before starting to see if it reads modulation. Afterwords to check, key the mic without making any sounds and see where the meter sits. Then whistle into the mic to see the meter moves up. If nothing happens it could be: 1) the "S" meter does not show modulation, or 2) you turned the adjustment in the wrong direction. If no one answers your calls it would be #2.

They’re not capacitors you have pointed out on the schematic, they’re inductors and their value is 0.47 micro Henrys. You can’t bluff your way through electronics, especially when giving advice. I thought this was a forum to help people, not hinder.

sounds like the PA has failed. Have a shop check it for ya, they usually will test for free

Remove D80 to achieve talkback, or put on switch. - www.killercatradio.com

Hello...the best way without making internal adjustments...is to use an amplifier microphone...maybe a turner style mike hand or base...there is just a connector soldeing job and is usally an instruction for what pins to connect for your radio...it is often no adjustment internally in your radio that is good becauie it can give the result of splatter and over modulation...good luck Ron

hi when you try to connect power to radio does it keep blowing fuses ,iff so remove the bottom panel/cover from the radio at the back of the radio where the power terminals enter the board you will see a black diode with a silver strip this is what we call a reversed or dummy diode remove this and your radio should work ok make sure to replace with new one you can find these in most cb radios goodlyck

first if must be adjusted for deadkey to be lowered down from 1-4watts as not to hurt the amplifier, then connect a small jumper to the amp, run heavy gauge wires to a good power source hopefully the battery.. just use a relay to switch on/off w/key/stereo circuit to turn main power off the the amp. if need too. Also the SWR's must be low have them checked. Free @ any Good Radio Shop.

Hi,my name is John. Welcome to FixYa. Your power mic. needs to be wired the the radio. Thanks for choosing FixYa....John

HI ,my name is John. It sounds like you might be on ssb. Put your Dial on the AM side and try it .....hope this was helpful...

Go to Cbtricks.com, Look up your radio and you can download a diagram of it then you will know the number of it.Just look up R73 on the drawing and thats it....hopes this helps,....

Mic plugged in? RF gain all the way to the right? Antenna?

Superstar Drawings

provides downloads for various free stuff on the net and it includes manual also. All you need to do is type a driver name eg “Channels Base CB Radiomanual” and it will provide you the download links to the driver without having you to move through a maze of web pages. also refine your search througn new menu

A super star will only put out around 28 to 30 watts, any more you need a linear, you could have you r swr checked to make sure your antenna is good, any good antenna should talk around 10 miles

try a stock mike or a noise canceling one. Hard to run power on top of power. And see what your radio is dead keying into the radio...usally with a 500 it can take up to a 6 watt dead key.

Some SWR meters also have this capability.