Quote:
Originally Posted by Radio Wrangler
Measuring the loss of an ATU is not easy, you need to be able to measure true power into whatever impedance it is transforming. In most ATUs the inductor is the big culprit, and its Q can be spoiled by putting it in too small a box (Whoosh! there went most of the MFJ, Trio, Yaesu and Icom atus)
David
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Returning to low-loss ATU's, so if the coil is length L and diameter D, what kind of dimensions does the enclosure have to be to keep a good value of Q?
B