SP-400-SX Super Pro Communications Receiver Downloads by MD0MDI SP-400-SX Super Pro Communications Receiver Downloads I have not been able to find much that is ‘Specific’ to the SP-400-SX Receiver, so for most of the technical stuff please refer to the SP-400-X Downloads Page. Hammarlund SP-400-SX Super Pro Communications Receiver – Alignment Information 9 Pages. … 508.28 KB 0 downloads Last Updated: 6th September 2022 Share WhatsappTelegramLINESkypeEmail Leave a Comment Cancel ReplyYou must be logged in to post a comment.