I use the ATU from the baby loop AFTER the Flexradio 6600 with its ATU bypassed as recommended, and BEFORE the SPE Expert with its ATU also bypassed! The SWR indicated by the Baby loop ATU are excellent, between 1.1 and 1.4, and inspite of it the Expert indicates the SRW limit is exceeded, and shuts off!? QUESTION: Should the Expert ATU be on instead of bypassed? Many thanks for your inputs and help!!