ve2pid wrote:
Tunes 6 to 600 ohms (about 10:1 SWR range). 16 to 150 on 6M (about
3:1)

I once emailed a tuner company (don't recall which)
and asked them about their specs. They told me that
their ohmic specs were for resistive loads. They
didn't say where one would find an antenna with
a 600+j0 feedpoint impedance - maybe a 4-wire
folded dipole?
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com