Hi, Having done the AF Gain mod a year or so ago with some improvement (K2 #279), I decided to order a new one and just dig in and replace the old one. What a great improvement! I can hardly turn the pot to 9 o'clock without the audio blasting me out now. And of course no scratchy sound. I would highly recommend switching that pot if you have an early K2. 73, Jay, W6JDB K2/100, KAT100...and all options.