This radio design was sold under several brands including Radio Shack and Sangean. Radio Shack's model DX-398 and Sangean ATS-909.
Disable muting while tuning aka "chuffing"
This radio has a similar design to the ATS-818 where the PLL muting circuit is processed by the controller chip.
- Disassemble the radio
- Locate CNT2
- Find the Black Wire connected to PIN 10 and gently pry out with a small screwdriver
- Use some heat shrink tubing and cover up the exposed pin and tuck neatly behind radio
- Reassemble radio and enjoy!