Kenwood TS-950S (TS 950 S TS950S) mods reviews software and diagrams

   
 
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26 November 2024, 12:29 UTC 


Transceivers


Motorola

Kenwood TS-950S (TS 950 S TS950S)
TS-950S
Programming interface schematics for Kenwood :
Programming software for Kenwood TS-950S (TS 950 S TS950S) :
PDF User Manual for Kenwood TS-950S (TS 950 S TS950S) :
PDF Service Manual/schematics for Kenwood TS-950S (TS 950 S TS950S) :

Mods for Kenwood TS-950S (TS 950 S TS950S) :
   Kenwood TS-950S (TS 950 S TS950S) W6NL Keying Jitter Correction Circuit
   Kenwood TS-950S (TS 950 S TS950S) Carrier Adjustment
   Kenwood TS-950S (TS 950 S TS950S) Antenna Tuner modification
   Kenwood TS-950S (TS 950 S TS950S) Using Subreceiver to Improve TS-950 Noise Blanker
   Kenwood TS-950S (TS 950 S TS950S) SO2 Adjust
   Kenwood TS-950S (TS 950 S TS950S) Implementation of the K6XX QSK Waveform Mod
   Kenwood TS-950S (TS 950 S TS950S) RF gain mod
   Kenwood TS-950S (TS 950 S TS950S) Countermeassure against cold solder joint at the resistor block; CP1-CP4 in the PLL unit
   Kenwood TS-950S (TS 950 S TS950S) Hum with monitor ON
   Kenwood TS-950S (TS 950 S TS950S) Noise with Sub-Band noise blanker ON
   Kenwood TS-950S (TS 950 S TS950S) 14.200 MHz transmit spur
   Kenwood TS-950S (TS 950 S TS950S) Low power output after temp. protection
   Kenwood TS-950S (TS 950 S TS950S) Infinite SWR at beginning of transmission
   Kenwood TS-950S (TS 950 S TS950S) Smoke from antenna tuner unit
   Kenwood TS-950S (TS 950 S TS950S) Transmit spur
   Kenwood TS-950S (TS 950 S TS950S) 18.115 MHz spur
   Kenwood TS-950S (TS 950 S TS950S) TX image on 18.115 MHz
   Kenwood TS-950S (TS 950 S TS950S) 80 meter spurious emission
   Kenwood TS-950S (TS 950 S TS950S) Final bias circuit change
   Kenwood TS-950S (TS 950 S TS950S) Rear panel cooling fan
   Kenwood TS-950S (TS 950 S TS950S) Speech processor noise
   Kenwood TS-950S (TS 950 S TS950S) N.B. Gate switching noise
   Kenwood TS-950S (TS 950 S TS950S) Early protection with TL-922A
   Kenwood TS-950S (TS 950 S TS950S) RX digital noise
   Kenwood TS-950S (TS 950 S TS950S) Two second TX power delay with MONI on
   Kenwood TS-950S (TS 950 S TS950S) Receiver noise
   Kenwood TS-950S (TS 950 S TS950S) general coverage transmit mod
   Kenwood TS-950S (TS 950 S TS950S) Power On Funktions
   Kenwood TS-950S (TS 950 S TS950S) Front-panel Sidetone Level Control

Kenwood TS-950S (TS 950 S TS950S) technical specifications :  Kenwood TS-950S (TS 950 S TS950S) technical specifications



Kenwood TS-950S (TS 950 S TS950S) Low power output after temp. protection

Symptom:
After transmitting for approximately 2 hours at 50% duty with 150 watts output the temperature protection circuit activates reducing the output power to about 50 watts. Normally, full output power will be restored after the fans have had a chance to cool things down. Occasionally the power output will not return to normal, even after extended receive operations.

Cause:
The temperature sensor is attached to the main transformer and is set to activate at 80°C. This setting was selected to reduce power before the internal fuse on the transformer opens.

Correct action:
After through testing, we have found that the temperature sensor should be set to 90°C to allow proper return to full power transmit. This setting will also allow the radio to be used at higher ambient room temperatures without worrying about the power output dropping in the middle of a QSO.

Parts required:

Qty   Description                          Kenwood Part No.  Circuit description

 1    90°C Thermal switch                  S59-1416-05       S1

Caution: This modification requires soldering equipment rated for CMOS type circuits. It also requires familiarity with surface mount soldering techniques. If you do not have the proper equipment or knowledge do not attempt this modification yourself. Seek qualified assistance.

Time required for this modification is 30 minutes or less.


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