SB-884 TS-930S 15 Meter Internal Beat Tone 1-27-84 Some users have reported an internal beat tone that appears every 10 KHz , when operating in the range of 20.000 to 21.500 MHz. Apparently the RV terminal of Switch Unit H is being affected by the 1st loop of the PLL unit. The cure is relatively simple. Add a .01uF 50v Disk ceramic capacitor from the RV terminal to ground. CLM Time required for this modification is 1/2 hour or less. (c) 121589TKC