Question about Magnum S9 Base CB Radio

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Hi mys9 with 1969 finals transmitts at about 15 watts,non variable on fm 3 watts variable--and peaks at 40 watts on am..ssb is about 5 watts.is this a final problem? many thank les

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In answer to your question, no, it is no a problem with the final. I would try turning the ALC control (VR12) until you have 45 Watts out. (Ref Magnum S9 alignment procedure on CBtricks.com.

....Don at NTCB, Inc.

Posted on Jun 29, 2011

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or Snakedoctors cb radio mods google site. Go to these radio mods sites on Google search and type in radio model. It will tell you what Vr inside to turn up RX of RF gain. Turn up modulation and written instruction if you are handy with solder gun how to change a resistor or cap to make it more sensitive recieve. How to replace final stage and resistors to 1/2 watt size for 6 more watts output and spread coils 1/8 inch apart like a comb for 100% microphone loudness or swing output. say 3 watts to 40 watts output. More windshield wiper swing in meter makes loud voice and extends range with Power final boost. Most people prefer to keep a mobile at around 11 watts swing to 45 watts.(but on generic radio meter will show 2 to 5 watts-its not accurate just a cheap indicator you are forward swing). Even though factory says 4 watts FCC hogwash. They come tuned from Cobra with 11 watts to 14-22 watts.Cobra really peaks them babies so competition doesn't beat them out like new louder radios made by Galaxy 55. Even though law says blah blah (corporations bend it)sales pitch Galaxy very heated with Cobra on the game(rich can do what they want)Galaxy is 20 watts factory with big promise to 40 watts dual finals. So Cobra updated and said "screw it we will break the law too" Now Cobra is loud as ever and offering their own super mod versions and dual final radios with 45 to 65 watts output with ranges on SSB & USB of 1500 miles on a strong good outdoor antenna.

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How many watts can you tune the dx-33hml up too


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Sep 05, 2010 | Galaxy Radios DX-33HML 40-Channels Base CB...

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How to adjust frequency on transmit??? Galaxy


hELLO THERE
hERE IS SOME MODIFICATIONS FOR THIS RADIO
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2 Answers

Just want to know if i should use my ll203 amp in am or ssb mode when running with a cobra CB radio?


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.

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1 Answer

No manual for my amp.


  • Class-D Monoblock Amplifier
  • Bass Boost Level and Frequency Remote Included
  • Variable Low-Pass Filter: 50 - 200 Hz (24 dB/Oct.)
  • Variable Input Sensitivity: 200mV - 5V
  • Phase Shift: 0° / 180°
  • Variable Infrasonic (Subsonic) Filter: 0/15Hz/25Hz (18 dB/Oct.)
  • High- and Low-Level Inputs
  • 1 Ohm Stable
  • RMS Power Output:
    • 500 watts x 1 chan. @ 4 ohms
    • 900 watts x 1 chan. @ 2 ohm
  • Preamp Outputs: 1 Pair
  • Bass Boost: 0 - 18 dB @ 40 - 100 Hz (Variable)
  • Dimensions: 15" L x 11-5/16" W x 2-3/8" H

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1 Answer

I have a galaxy93ttwin turbine that has a modulation prob on ssb


well i hate to tell you this but some cb ******* shop hacked the **** out of you radio and you have been ripped off they probably ripped all the audio limiters out volted the final and put that stupid modulation kit in there. unbeliveable. i hate the cb hacks that give good techs like me a bad name. shame on the hackers. that is why it does not work on sideband.

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Kl 203 rm italy linear amp transmitt


You just have to lower your RF power so that the radio is putting out about a 2 watt dead key. Any higher and you will over drive the finals and burn out the final

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1 Answer

Audio limiter


tintlady, here is the info you requested;
the AM limiter is R 276

These are the variable adjustments inside,and what they control.
VR-1 AM S-METER
VR-2 SSB S-METER
VR-3 SSB SQUELCH RANGE
VR-4 AM SQUELCH RANGE
VR-6 SSB CARRIER BALANCE
VR-7 TX OFFSET
VR-9 RF METER
VR-10 FINAL BIAS
VR-12 DRIVER BIAS
VR-13 SSB ALC
VR-14 AM HIGH POWER
VR-15 AM MODULATION METER
VR-16 AM MODULATION
VR-17 SSB POWER
VR-18 AM LOW POWER
VC1-10.240 MHz Frequency adjustment

Hope this helps you out, let me know,,Mechanic

Jan 20, 2008 | Radio Communications

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