Kenwood TS-820 (TS 820 TS820) mods reviews software and diagrams

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Kenwood TS-820 (TS 820 TS820)

TS-820

Programming interface schematics for Kenwood :
Programming software for Kenwood TS-820 (TS 820 TS820) :
PDF User Manual for Kenwood TS-820 (TS 820 TS820) :
PDF Service Manual/schematics for Kenwood TS-820 (TS 820 TS820) :

Mods for Kenwood TS-820 (TS 820 TS820) :
   Kenwood TS-820 (TS 820 TS820) receive problem after transmitting
   Kenwood TS-820 (TS 820 TS820) Additional info about the VCO table in the Service manual
   Kenwood TS-820 (TS 820 TS820) DS-2 Replaces DS-1A DC-DC Converter
   Kenwood TS-820 (TS 820 TS820) General Alignment Procedure
   Kenwood TS-820 (TS 820 TS820) RIT modification
   Kenwood TS-820 (TS 820 TS820) Microphone input attenuator
   Kenwood TS-820 (TS 820 TS820) Fix the problem with the display
   Kenwood TS-820 (TS 820 TS820) New Display Tube for DG-1
   Kenwood TS-820 (TS 820 TS820) CW filter select control
   Kenwood TS-820 (TS 820 TS820) Installing AUX Band in TS-820 (RX only)
   Kenwood TS-820 (TS 820 TS820) TA7201P Substitution Parts Kit
   Kenwood TS-820 (TS 820 TS820) Speech Processor Alignment

Kenwood TS-820 (TS 820 TS820) technical specifications : Kenwood TS-820 (TS 820 TS820) technical specifications

Kenwood TS-820 (TS 820 TS820) RIT modification

We have had a few reports of the TS-820 RIT tuning being "rubbery". The following information will solve this.

How to modify:

Remove resistor R27 (1Kohm) on AF-AVR unit (X49-1080-00).
Install a 10Kohm resistor on foil side of AF-AVR unit. See figure 1.
Install a 1 Kohm resistor on RIT control. See figure 2.
Install a capacitor (3.3uF - 10uF) between RIT control and ground. See figure 2.
Adjust VR-2 on AF-AVR unit (X49-1080-00) for the same frequency as the center position of the RIT control.

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