Owen Duffy wrote:

Cecil Moore wrote:
If 100m (325 feet) of ladder-line results in 6dB loss, then a more
realistic 75 feet of ladder-line will result in about 1.4 dB of loss.

Close, I make it 2.2dB.

What matched line loss are you using? The wireman says that line
has about 0.2 dB of matched line loss per 100 ft at 30 MHz. According
to the chart in my ARRL Antenna Book, an SWR of 25:1 at the load
would cause about 1.5 dB loss in 75 feet.

... waiting for me to forget to cross an 'i' or dot a 't'.

Cecil, people often employ long runs of open wire feed on HF ...

Did you miss the humor?
--
73, Cecil http://www.qsl.net/w5dxp