Kenwood TS-950sdx SDXCC 6Kc TX Unit

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There's Modness to ar Methods!!   TS-950sdx VOX Sensitivity Mod   There's Modness to ar Methods!!

Gotta Trigger dat VOOODOOOO!!!

Read this boring 'Stuff...

Disclaimer Notice
These modifications should be accomplished by qualified personnel who
have had enough knowledge and practice in SMD soldering techniques, at the owners risk.


We are not responsible for any personal injury incurred while performing these mods.
We are not responsible for any damage to, or illegal operations of the equipment as a result of the mods,
mod errors, or possible mod misinformation via these pages.

The Radio modifications shown here are provided for properly licensed operators only.
The user is solely responsible for making sure that any modifications made to
the radio unit must meet all Federal and State Regulations for the Country of use.
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Modifications are provided for information purposes only.
Although the greatest care has been taken while compiling these documents,
we cannot guarantee that the instructions will work on every radio presented.

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Gotta have PARTS!!!

3.3K ohm - 1ea Needed
1/6 watt Axial Resistor
Digikey - 3.3KEBK-ND ---- CFR-12JB-3K3

VOX Circuitry:

It was noted that the VOX Sensitivity was too low after the Transmitter Mods were accomplished on the TS-950sdx.
It was determined that the modified mic input mixer circuit consisting of the 2ea 3.6K resistors was
reducing the drive level to the VOX circuitry and not allowing the VOX to trigger.

By placing a 3.3K Ohm Resistor in parallel with R3 (4.3K) on the VOX Unit CB (X59-1080-01),
it will make the final resistance value 1.92K Ohm, which will increase the Gain of the Op Amp from 213 to 516.
This makes the VOX Gain Control track normally and VOX Sensitivity is back to normal.

Reference the pictures below to locate and add the Resistor on the VOX Unit CB.

VOX Schematic
This is the schematic for the VOX circuit with the added 3.3K resistor.

VOX CB Location
The VOX CB is located on the AF Unit

Note the Solder Pads indicated to install the 3.3K Resistor.

VOX Resistor Installed
This is the resistor installed with the heat shrink.

That's it!
Another real easy mod.
Take Care!!

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