> In general, the most efficient setting for a T-Network tuner is the one
> that makes it looks
> as close to an L-Network as possible.
I've noticed the same result and my primary ATU is a remote-controlled
switchable "L." Also component Q and total output C makes a substantial
difference with C-L-C "T" tuners when low Z terminations are used. A while
back, I was very much fixated on high output C from a T tuner to achieve
reasonable efficiency with low Z loads. But as I began experimenting with
EZNEC and transmission line simulator software, a multiband dipole or loop
for a half-wave length (or more) at the lowest operating frequency will
never plague you with anywhere near those low-Z loads.
OTOH, anyone planning on using physically short antennas, needs to be
mindful of component Q and C values. Myself, I would try to stay away from
physically short antennas, absent a mobile antenna installation. And so,
most tuners are adequate when full-size multiband wire antennas are used.
Paul, W9AC
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