Question about Superstar SS-121 120-Channels Base CB Radio

1 Answer

I want to know how to convert my superstar121

Can someone tell me how to do the conversion thanks

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Contributor
  • 40 Answers

3 Bands (LOW - MID - HIGH) 25.515 - 27.855 MHz.
i want to know how to convert my superstar121 - st121_freq_cov.gif

Export Frequency Conversion
1. Remove the top cover from the unit and locate the PLL chip (MC145106P). Unsolder the short jumper wire running from the +8.2vdc source to pin 9 of the PLL chip. 2. 2. Resolder the three pins of the PLL chip, Pins 10, 11, and 12, being carefull not to short them together. Note: The Super Star 140 Microphone wiring is the same as all Midland Radios.

Posted on Mar 13, 2009

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Converting magnum 257hp to receive all freq.

if you need to ask then get it done by someone that knows what they are doing.

Mar 19, 2013 | Magnum 257 CB Transceiver with Blue screen

1 Answer

I have a connex 4800 dsl its a great cb but I need info on (buttuns,and what the ch. are in reslation to the frequency has a freq. counter on it ,but dont know which ch is what freq. can you help

  • This site does not allow a big enough spot to upload a diagram that would be beneficial for this purpose so I had to upload it off site. Since this radio is often converted to run on 11 meter (CB frequencies) the diagram I uploaded corresponds with the frequencies after conversion.

  • On the Connex radio's the band "HI/LOW" switch determine the band you are on in relation to the knob. If you want the original, stock, frequency chart let me know and I can put that up as well.

  • If you have any comments please feel free to leave them here.
  • Hope this helps and thank you for using FixYa.

Regards, Tony

Oct 02, 2011 | Connex 3300 240-Channels Base CB Radio

1 Answer

On my radio I need the settings for the knobs because other people can hear me but I only get static and cannot hear them. Thanks

Band should be E Band high/low button on high 10 khz off AM selected
To check that you have done this correctly frequency counter will read 27.185 plus or minus 5 khz. This is of course proved you have a radio that is converted for 11 meter cb frequencies. Frequency Conversion is the channel expansion mod/conversion

Sep 16, 2011 | Galaxy Radios DX- 88HL Base CB Radio

1 Answer

Cobra 2000, volume all the way up and still can't hear it. unless someone close is talking and then u still can't tell what they are saying

Hi, my name is John. Welcome to FixYa. Put a external speaker in the back if it and try it. Let me know. Thanks for choosing FixYa....John

Nov 25, 2010 | Cobra CB Radios

1 Answer

Connect power mic to my superstar121 and transmit light comes on. Connect original mic and all works fine any ideas.

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

Nov 16, 2010 | Superstar SS-121 120-Channels Base CB...

1 Answer

I have a midland 77-115 weather max111 and there is a humm in it i think becouse of the freq conversion any sugestion before i stick my finger in it to convert the channels bach to 27mghz

what kind of hum are you getting. and is it power line noise or something comeing from the radio. like being converted on a extra band hearing noise?

Dec 09, 2009 | Midland 77-115 CB Radio

1 Answer

FM conversion ?..

Speak to Spectrum Communication, they sell FM boards. Google their company name for details. thanks

Jun 22, 2009 | Uniden PC78ELITE 40-Channels Base CB Radio

1 Answer

Information on how to use DX 45MP radio

The DX 45mp is a 10 meter radio meaning you need a license to use any other band other than the normal 1- 40 cb channels, its capable of going beyond the normal cb range.Ask if it has been converted to 11 meter. Channel E should be the normal if it has been converted from 10 meter to 11 meter. Im sure its been converted if its been used for a mobile cb application. Normal cb band is called 11 meter 26.965 mhz to 27.405 thats 1- 40 . Your not supposed to talk on the other bands unless you have an amature radio license but everyone does anyway . I have several galaxys and by far in my opinion are the best on the market. Go to on the home page go to Radio Informaion click it go to G and follow it to Galaxy DX radios youll find all the info for this radio you can even print out the channel chart to see where everything is. Good luck and if you have any more questions just ask. Thank you Chia

Nov 05, 2008 | CB Radios

1 Answer

Cobra 29 ltd night watch with sound tracker i want to convert it

Go to a CB shop and have them put in an "A" board. Then have them tweak & peak. Got mine done for $80.00.

Jun 04, 2007 | Cobra 29 LTD CB Radio

Not finding what you are looking for?
CB Radios Logo

332 people viewed this question

Ask a Question

Usually answered in minutes!

Top Superstar CB Radios Experts

Level 2 Expert

489 Answers


Level 3 Expert

3018 Answers


Level 2 Expert

59 Answers

Are you a Superstar CB Radio Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides