[TenTec] Tuner types and efficiency

[rohre]

Duane and the gang,
Matching networks have been discussed and wrung out pretty well over on the
QRP reflector, because every dB counts over there!

Well, someone there started testing tuners, ATUs whatever you want to call
them.  And there were a series of tests also published in QST.

The Ten Tec tuner having an L network is going to have one less component to
have losses.  It has already been pointed out, that generally it only has one
valid setting for a frequency, unlike the more numerous Tee tuners that can
have one setting of lower loss, and another setting with more loss.  The
matching device tests show in general that the L network is the lowest loss of
all antenna matching devices.

It should be a good choice to choose the Ten Tec unit.   I agree, the chart
for quick look up is needed for any matching device.  Humidty change, ice,
rain, etc. change the parameters of the antenna and feed line you are matching
to your rig from one operating time to another.

73, Stuart K5KVH

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