For Sale $40 Elecraft AF1 Active Filter For the K-3 or other receivers. Build and tested. http://www.elecraft.com/mini_module_kits/mini_modules.htm#af1 Built by local Ham, perfect condition. New Price is $60 Unbuilt Pick up or $5.00 shipping to SEDX Club members Ron at k4wz or 404-388-2805