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Cherokee CBS-1000 Modification

 

These are mods for the Cherokee AM/SSB Base Station. The Model CBS-1000.

*Disclaimer: This is for informational purposes only and are deemed illegal in many countries. All 10 meter and export CB radio mods, adjustments, tune-ups, channel/frequency expansions, modulation, power adjustments are related modifications are also done at the users risk and we assume no liability.

 

This Cherokee Base Station. Looks very much like the Cobra 2010GTL, but offers a lower profile
design. Includes the following standard features:

  • AM/USB/LSB operation.
  • 10 NOAA Weather Channels.
  • 5 Memory Channels with push button access.
  • Dual Channel watch.
  • Channel scan.
  • Memory scan.
  • LCD Display with frequency display and channel display.
  • Dual analog meters:
    • One for TX-Power/S-Meter.
    • One for Modulation/SWR.
  • Front controls are:
    • Power & Volume
    • Squelch
    • RF-Gain
    • Mic-Gain
    • Clarifier
    • Channel
    • SWR Cal
    • Meter Function Cal-SWR-MOD
    • Plus 8 multifunction buttons.

 


 

Channel Modification:

  • Remove top cover.
  • Locate the back of the display board.
  • On this board you should see two pin's, Connect a jumper wire between the pins.
  • Power on the Unit holding down the #1 button.
      Remember to hold the button down for about 5 seconds after power is applied.
  • To change bands just press button #1 and the bands are labeled A,B,C,D,E is missing and is the CB band, 
      F,G,H,I and J. (Coverage from 25.165-29.665 Mhz).

 


 

Modulation Modification:

  • The known variable adjustments are:
  • VR4 AM carrier
  • VR14 ALC ssb
  • Modulation Limiter:
    • Remove small transistor under wx board next to diode D24.
    • Set AM Carrier to 4 Watts No More. Modulation will be better than 100%.
    • SSB output should be 12 Watts PEP or better.

 


 

Thanks to "Smiley" for these two
5K shift modification plus FM Receive, but no FM Transmit.

  • Solder SJ2 Jumper pads located just left of the channel modification jumper.
  • To change shift press CRSE button.

  ------- | | SJ2 5K Mod. |SY-203 | - - | IC | SJ1 SJ3 Ch. Mod ------- - - - -

OPEN CLARIFIER MODIFCATION

  • Locate jumper J94 located just left of C178 on main PC board.
  • Locate jumper J132 cut J132, add insulated jumper between J94 and J132
    (put jumper on J132 on half closest to the front of the radio).

 


 

Some additional information for your files.


RV1 RF Power Meter adjust RV2 Squelch Level adjust RV4 AM Carrier adjust RV7 Modulation Meter adjust RV11 13.8 Volt RV12 S-Meter Adjust Both AM and SSB. RV14 SSB ALC adjustment. RV50 Clarifer Center adjust

 


 


CBS-1000 Band A Band B Band C Band D Band E Band F Band G Band H Band I Band J Channel No. CB Band 1 25.165 25.615 26.065 26.515 26.965 27.415 27.865 28.315 28.765 29.215 2 25.175 25.625 26.075 26.525 26.975 27.425 27.875 28.325 28.775 29.225 3 25.185 25.635 26.085 26.535 26.985 27.435 27.885 28.335 28.785 29.235 4 25.205 25.655 26.105 26.555 27.005 27.455 27.905 28.355 28.805 29.255 5 25.215 25.665 26.115 26.565 27.015 27.465 27.915 28.365 28.815 29.265 6 25.225 25.675 26.125 26.575 27.025 27.475 27.925 28.375 28.825 29.275 7 25.235 25.685 26.135 26.585 27.035 27.485 27.935 28.385 28.835 29.285 8 25.255 25.705 26.155 26.605 27.055 27.505 27.955 28.405 28.855 29.305 9 25.265 25.715 26.165 26.615 27.065 27.515 27.965 28.415 28.865 29.315 10 25.275 25.725 26.175 26.625 27.075 27.525 27.975 28.425 28.875 29.325 11 25.285 25.735 26.185 26.635 27.085 27.535 27.985 28.435 28.885 29.335 12 25.305 25.755 26.205 26.655 27.105 27.555 28.005 28.455 28.905 29.355 13 25.315 25.765 26.215 26.665 27.115 27.565 28.015 28.465 28.915 29.365 14 25.325 25.775 26.225 26.675 27.125 27.575 28.025 28.475 28.925 29.375 15 25.335 25.785 26.235 26.685 27.135 27.585 28.035 28.485 28.935 29.385 16 25.355 25.805 26.255 26.705 27.155 27.605 28.055 28.505 28.955 29.405 17 25.365 25.815 26.265 26.715 27.165 27.615 28.065 28.515 28.965 29.415 18 25.375 25.825 26.275 26.725 27.175 27.625 28.075 28.525 28.975 29.425 19 25.385 25.835 26.285 26.735 27.185 27.635 28.085 28.535 28.985 29.435 20 25.405 25.855 26.305 26.755 27.205 27.655 28.105 28.555 29.005 29.455 21 25.415 25.865 26.315 26.765 27.215 27.665 28.115 28.565 29.015 29.465 22 25.425 25.875 26.325 26.775 27.225 27.675 28.125 28.575 29.025 29.475 23 25.455 25.905 26.355 26.805 27.255 27.705 28.155 28.605 29.055 29.505 24 25.435 25.885 26.335 26.785 27.235 27.685 28.135 28.585 29.035 29.485 25 25.445 25.895 26.345 26.795 27.245 27.695 28.145 28.595 29.045 29.495 26 25.465 25.915 26.365 26.815 27.265 27.715 28.165 28.615 29.065 29.515 27 25.475 25.925 26.375 26.825 27.275 27.725 28.175 28.625 29.075 29.525 28 25.485 25.935 26.385 26.835 27.285 27.735 28.185 28.635 29.085 29.535 29 25.495 25.945 26.395 26.845 27.295 27.745 28.195 28.645 29.095 29.545 30 25.505 25.955 26.405 26.855 27.305 27.755 28.205 28.655 29.105 29.555 31 25.515 25.965 26.415 26.865 27.315 27.765 28.215 28.665 29.115 29.565 32 25.525 25.975 26.425 26.875 27.325 27.775 28.225 28.675 29.125 29.575 33 25.535 25.985 26.435 26.885 27.335 27.785 28.235 28.685 29.135 29.585 34 25.545 25.995 26.445 26.895 27.345 27.795 28.245 28.695 29.145 29.595 35 25.555 26.005 26.455 26.905 27.355 27.805 28.255 28.705 29.155 29.605 36 25.565 26.015 26.465 26.915 27.365 27.815 28.265 28.715 29.165 29.615 37 25.575 26.025 26.475 26.925 27.375 27.825 28.275 28.725 29.175 29.625 38 25.585 26.035 26.485 26.935 27.385 27.835 28.285 28.735 29.185 29.635 39 25.595 26.045 26.495 26.945 27.395 27.845 28.295 28.745 29.195 29.645 40 25.605 26.055 26.505 26.955 27.405 27.855 28.305 28.755 29.205 29.655