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Modifications to the ChaoYu CY-668A

Suitable for devices with built-in torch

• Fitting an external RF socket - hooking up to an external antenna
• Beefing up the bass - increasing the PLL loop filter time constant
• That nasty tinkling noise
• Reducing background hiss
• Increasing the input sensitivity
• Setting stereo balance
• Adding RDS
• More Power - don't try this at home kids!