For the 10 meter mod and other very good information on the Kenwood TL-922A I would suggest visiting Richard Measures webpage. Some of it is hard to figure out, but he sure knows his stuff. www.vcnet.com/measures Also, you can get all the help on the TL-922A or any other amp by going to the amplifier reflector. http://lists.contesting.com/_amps/ Hope this helps. Joe K0BX