[TenTec] [Fwd: Line Isolator Balun (sorta) question.]

[Stuart Rohre]

Thanks, Jerry,
"forced balance" was a poor description.

  What I should have said is the late W5YR found that with his simple 
ferrite cable chokes he was able to use ladder line, (parallel) line 
with his Tee tuners and had no further hot chassis issues.  Now, he was 
using dipole type antennas, and he lived in an area that has much higher 
ground conductivity than some areas.  His antennas were in the clear, 
which can affect RF on the shield, if one cannot keep the antenna at 
right angles to the feedline. Individual results can depend on many 
issues, and I did not address the issue someone else later raised of the 
elevated ham shack well above an earthing point.  Most of those also 
need a ground tuner box, or quarter wave counterpoise wires for the band 
in use, to mitigate RF on the chassis.

His beads were larger than the types on the original bead chokes made 
commercially.  They were of a diameter to enable teflon versions of 1/4 
inch coax slipped into them, and had about 3 X the length vs. their 
outside diameter.
 From several vendors there is more of a choice in  pierced ferrite 
materials today, than in the first days of cable choke use.

Stuart
K5KVH