TS940.12 The quickest way to verify whether the fix has been installed is to check R120 and R129 on the PLL Unit (X50-2020-00). If these two resistors are 3.3 ohms in value, the fix is already installed. Do not depend on the on the absence of C176, C180 or C181 as an indication, as earlier attempts (factory or field) to correct the mixing noise problem may have removed these same capacitors. The instructions in the bulletin state that when making the modifications to the RF Unit (X44- 1660-00), it is easiest to move C132/C133 to the foil side of the board. As the component side of the section of the RF Unit containing these two capacitors has been filled with wax, it is definitely not easier. The factory installation of the fix left C132/C133 on the component side and insatalled the R154/C193 and R155/C194 series RC networks on the foil side. This is definitely easier. As a side note, the instalation of the fix took me about 2 hours. Both the PLL Unit and RF Unit modifications must be completed before the transceiver is usable. If you install just the PLL Unit modifications and then try the receiver, CW signals will sould like raw AC. Also, to make life simple, do not remove each of the boards above the PLL Unit individually. The easy way to gain access to the PLL Unit is to remove the top two screws (one on each side) holding the front panel and loosen the bottom tow screws. This allows the front panel to be tilted forqard. The speaker assembly and all the boards above the PLL unit may then be removed as a unit by removing only 4 screws and tilting this unit towards the front of the TS-940S. No cables need be removed from the boards above the PLL Unit. I hope the above information is helpful to you in dealing with the reciprocal mixing noise problem. (Thanks, Rich Maher, WZ4Z, 1117 NW 7th St., Boynton Beach, FL 33435) RELAYED BY...N0KGX...GENE