Roy Lewallen wrote:

Cecil Moore wrote:

Roy Lewallen wrote:
A transmission line can be very lossy, yet have a completely real
characteristic impedance.

That's what I thought. Is RG-174 one of those transmission lines?

No. Distortionless lines are specially made, or periodically loaded with
fixed components to achieve distortionless characteristics.

Incidentally, I recently carefully measured the Z0 of nine pieces of
RG-58 type cables at 10 MHz. R varied from 48.1 to 57.2 ohms, and X from
-0.67 to -2.32 ohms.

Assuming 57.2 - j2.32 ohms Z0, our 50 ohm SWR meters may be off
by 15%? Could this be the answer to Richard C's SWR readings?
I suggested that as a possibility early on but he dismissed it.
--
73, Cecil http://www.qsl.net/w5dxp



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