Question about Superstar SS-3900EGHPA CB Radio

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A need help on my superstar 3900 the signal meter does not work on fm (rx) it key's up and stuff and is fine every where els plz email me with help charles_stewart2k9@hotmail.com

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The FM has no forward modulation. You're radio will key up but you can't transmit on it. All cb radio are like that after conversion.

Posted on Jun 02, 2010

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I have a superstar 3900 black but on am no mod but it keys up fm usb and lsb are fine


check the am voltage regulator. you should have 12vlts on pin 1 ,4volts on pin 2 ,13 vlts on pin 3 . go to ( CB tricks .com ) its the same board layout as galaxy 44 . http://www.cbtricks.com/radios/superstar/3900/graphics/ss3900_sch.gif if you are looking at the board on solder side ,knobs faceing you ,it is located on top left hand corner ,about 1 inch down you will see the slot cut into the board .if you have vlt on pin2 less than 4vlts or higher than 8vlts its bad. Galaxy DX Radios DX44V Service Manual its (tr) 51
Galaxy DX Radios DX44V Service Manual

Jun 02, 2014 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

Superstar 3900 meter not working


Need more info, is the wires soldered on, has one broken, on board do you get a reading an not on meter? Could be meter or poor solder or broken wires. Because you dont get readings at all, tells me its more likely the meter or connections

Mar 23, 2014 | Superstar 3900

1 Answer

I've brought a superstar 360fm ssb rig off ebay and when i was trying to tune the arial in the mic stopped keying up and i couldn't hear any one as if the mic was disconnected, it was a really old mic that...


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?

Oct 10, 2013 | Radio Communications

1 Answer

Superstar 3900 el led rx/tx cambia a naranja en ves de rojo


There can be several things for that. 1 a bad microphone.2. bad switching diode. or 3 bad rx/tx transistor.. if its staying orange. the #2 is probably the issues.
can you provide more detail, as will it RX.. at all.? will it work in PA mode if theres one? etc

Apr 21, 2013 | Superstar 3900

1 Answer

Can anyone please help me with my superstar red 3900 has i have changed the audio chip and protection diode and i have still got no recieve what could the problem be thanks


No RX or No Audio?

Could be blown protection diodes or if no audio a faulty capacitor close to the audio chip!
The protection diodes can blow if you were close by someone with a high power transmitter, then the diodes would blow kinda like a fuse to protect the rig, result no RX symptom!
Replacing the diodes will cure that problem, located close to the rear of the rig.

Sep 06, 2011 | Superstar SS-3900EGHPA CB Radio

1 Answer

I have a 3900 that has good signal but no audio check the mic and the plug out and all the joints all look good. Also checked the mic on another rig and it works fine.


Sounds like to me you regulator is bad, the dig three legged one in the back mounted to the side of the radio, if you have a meter check to see,outside legs should read 13 middle one at least 5 volts.This will cause you not to have key.

Jun 18, 2011 | Superstar SS-3900EGHPA CB Radio

1 Answer

I have an older style Superstar 3900 that is ''deaf''


in the middle of board. towards the back there is a IC .. that is a preamp, and all the diodes for the RX and the bigger tunning transformers with the big red(sometimes) ferrites are for the RX if cannot figure it out contact me further infomatiion

Nov 03, 2009 | Radio Communications

2 Answers

Superstar 3900 with no USB or LSB on receive.


most likely been fiddled with and out of alignment. If you have a freq counter and a volt meter you could possibly fix it yourself. look at cbtricks.com for the aligment procedure.

Jun 13, 2009 | Cobra 148 GTL 120-Channels Base CB Radio

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