Attempted tuning on 11 meters using MFJ269C. Antenna reactance with existing Beta matching shipped with these new SPT500's is poor. I did manage to get close to 1.3:1 but the bandwidth seemed to narrow. Others on this and other forums have noted the significant difference in the matching network as compared to the original SPT500. I confirmed that rebuilding the entire matching section first out of number 12 solid copper wire to fine tune the measurements. Now I'm able to tune this thing...
Tuning the MFJ SPT500 Super Penetrator
Tuning the MFJ SPT500 Super Penetrator