Bob-- Effecient?? That term can apply to the LOSS in your feed line/
VSWR?Frequency!
and, obviously, the POWER HANDLEING capabilities of the tuner/feedline!
But, generally, unless
you are at VHF, with couple hundred feet of feedline (I.E. 10 meters, or
below)! any effeciency
difference will never be HEARD!! the loss diff will probably be less than 1
dB!
My advice? go for it, as long as it is in your tuners power rateing, for hi
Z mismatch!
Jim NN7K

Bob sent:
"bob" wrote in message
...
Which should be more efficient: Using an ATR-30 to match a 300 ohm load
directly through a W2DU type balun, or using the same tuner to match 150
ohms using a CWS Bytemark 2:1 balun? Bandwidth is not a concern.I already
have the tuner and baluns. I realize there may be little difference
between
the two choices, but I will be using the tuner and one of the baluns
anyway.

73,
bob