Modifying the CW AGC of a Kenwood TS-130V

The AGC of a Kenwood TS-130V becomes nervous when the receiver is switched to CW mode. The reason is its short time constant. Here's a mod that makes listening to CW more comfortable.

Parts required for the mod:

• Resistor, 15 kΩ, low power (1/4 or 1/8 watt)
• Capacitor, 0.33 µF, small ceramic (voltage not critical)

Procedure:

1. Open the TS-130V completely.

2. Locate the IF board on the bottom side.

   

3. Find connector "33" near the transceiver's rear panel.

4. Locate pin 4 (red wire, labeled "AGC") and pin 5 (brown wire, labeled "RFG").

   

5. CAREFULLY strip a small piece of insulation from both wires.

6. Solder the 15 kΩ resistor and the 0.33 µF capacitor in series between the two wires.

   

7. Insulate the whole assembly with electrical tape.

Done!