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Mods - Kenwood TS-2000 DSP
by N3GX

Kenwood TS-2000 Transmit / Receiver eSSB Modifications by N3GX

Kenwood TS-2000 TX / RX DSP Mods

Disclaimer Notice:

The following modifications were obtained from N3GX and should be done by qualified personnel at the owners risk. I am not responsible for any damage to, or illegal operations of the equipment as a result of mod errors or possible mod misinformation via this page.

For additional information, please contact Alex (N3GX) via e-Mail at:

N3GX DSP MOD for 3.3 kHz Transmit and 4 kHz Receive

Download Alex's original Full DSP Modifer program, can be obtained
by clicking the download button on the right...

New Simpler Version of Modifier Software Now Available!

N3GX has developed a simpler program that communicates from your computer to the Kenwood TS-2000 via a serial link that sends new data to the 2000's DSP that modifies the behavior of the DSP receiver and Transmitter bandwidth.

Download N3GX has provided his program for free and can be
downloaded by clicking the botton on the right...
  • Click the "Download" button to download ""
  • Save to a directory of your choice.
  • Unzip the files to a directory of your choice..
  • Install the files on your computer.
  • Run the program and follow the menus.
  • See the instructions below when using this version of the Modifier program:

How to use the N3GX "Xpress" software (by W9BR)

After downloading, unzipping and loading software into PC, follow these simple steps:
  1. Make sure you have a straight through 9 pin DB-9 connector and connect from serial port of Kenwood TS-2000 to your PC.

  2. Match the Com port settings of your PC to the Kenwood by doing the following:

    • Go to Menu 56 of Kenwood TS-2000. See what the setting is. This is more than likely 9600 bps, which is factory default. However, it is important that this speed matches the speed of your PC com port that the cable is conneccted to. Use +/- keys to set the baud rate to the proper settings. Make sure you turn radio off and on to establish the settings in the radio

    • Open Kenwood DSP Modifier program. Make sure that the com port settings of the DSP program on your PC and then match PC Com port to your radio (i.e. Com 1 = 9600 baud). Com 1 or Com 2 are the preferred ports.

  3. Click on connect icon. If your PC connects to your radio, the connect icon lights red.

  4. Click on update. The update light will flash green. It takes only a matter of seconds and the information transfers to your TS-2000.

  5. Close the program on your PC

  6. Go to Menu 20 on your Kenwood TS-2000. Using the +/- keys, set the RX equalizer to USER.

  7. Go to Menu 21 on your Kenwood TS-2000. Using the +/- keys, set the TX equalizer to User

  8. Go to Menu 22 on your Kenwood TS-2000. Using the +/- keys, set the Transmit filter bandwidth for 3.0 kHz

  9. DO NOT use your processor unless you’re chasing DX!! Using your processor changes the low end filter from 10hz to 100hz. You will sound much more natural and have the benefit of the increased low end without the processor.

Good luck and enjoy the wider bandwidth.

Have fun and enjoy the new fidelity from your Kenwood TS-2000 !

Kenwood TS-2000 Transmitter Audio Response Before DSP Modifier Applied
Kenwood TS-2000 Transmitter Audio Response After DSP Modifier Applied
(Using "N3GX Gold" Profile)

Keenwood TS-2000 Before After Receiver DSP Mod

Graph courtesy of K9DXI

N3GX Comments:

  • "I do not have the Official Kenwood DSP algorithm or formula, secret codes or similar information"

  • "No help files...(I wrote it for myself and was never intended to be for distribution.....Sorry!)
    However, a minimum degree of technical knowledge, common sense and familiarity with hexadecimal numbers is expected."

  • "The fields Highlighted in Yellow seems to be the key ones to produce major changes."

  • "The mod is NOT a firmware Rewrite, it is just a filter command to the DSP while in 'User Mode'. (YOU DO NOT NEED TO OPEN THE RADIO)"

  • "If a full reset is performed, the filter command will be lost and 'reloading' will be required."

  • "Spectrum analyzer software is needed only to 'SEE' the curve while designing a 'NEW' DSP filter but not for loading one of the samples provided."

  • "To design your own filter, you have to do 'Trial and Error' procedure."

  • "RELAX, No matter what you do, the radio WILL NOT be damaged. (It is just like programming a 20 meter frequency on the radio's memory)."

"Have Fun, Good luck and share your results..."

Alex, N3GX

Note: See also the DL7CG Kenwood TS-2000EQ mods avaialble at this website:
John M. Anning - NU9N e-Mail:  e-Mail NU9N
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