The ARRL Compendium 7 has a very detailed article on how to make a 160M
base loading coil for mobile operation.
The very old ARRL Antenna Anthology also has an article by Barry Boothe,
W9UCW (The Minooka Special), on loading coils for 160, at least one of
which could be used for a mobile antenna. This was a repeat of an article
that appeared earlier in QST.
Be aware that the coils shown in the W9UCW article are quite lossy. A local
friend built one some years ago and used it very successfully at 100 W,
while parked near salt water. When he increased power from 100 W to 400 W
however, he started the PVC coil form on fire. He told a very funny story
about all the attention he got. He showed us the remains of a burned coil
form at a subsequent hamfest.
INK N4OO
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