[TenTec] Tuner parallel line into the shack

[Stuart Rohre]

In place of cutting slit in your ceiling, simply drill two holes the 
spacing of the line and insert bolts long enough to protrude on both 
sides.  If the ceiling is sheet rock you probably don't need an 
insulated sleeve over the bolt, for 100 watts, but that is easy to do 
with shrink tubing or plastic tube.  Put nuts and lock washers on each 
end of the bolts and simply bolt the cut ladder line to the nuts up in 
the attic side, and another piece of parallel line from ceiling side 
down to the tuner.

Putting a half twist every 18 in. in parallel lines cancels out coupling 
to nearby conductive or structure components.

Look up historic pictures of ship radio rooms back in the days of wooden 
deck houses for a shack and you will see how they used insulated 
bushings to bring feedlines into the shack.

Stuart Rohre
K5KVH