I found this interesting article (below) on the evolution of Force 12's current Tornado loading coil design from the beginning with the Tom Schiller, N6BT original design to their final Tornado versi
Bob, The Tornado coil is a motorized inductor that compresses or expands the coil to change inductance. It was developed by Seco-Systems, not N6BT. They are heavy and expensive but cool. To the best
I found this interesting article (below) on the evolution of Force 12's current Tornado loading coil design from the beginning with the Tom Schiller, N6BT original design to their final Tornado versi
I found this interesting article (below) on the evolution of Force 12's current Tornado loading coil design from the beginning with the Tom Schiller, N6BT original design to their final Tornado versi
With wider turn spacings capacity between turns is lower and coil Q higher. Centre loading is more sufficient then base loading on shortened antennas. Silver plating of coils with cool-amp is for the
When I saw this post I thought that they were using adjustable Tornado coils, which would have been really nice to cover both CW and SSB segments. However these Tornado coils do not appear to be adju
Centre loading is more sufficient then base loading on shortened antennas. Silver plating of coils with cool-amp is for the birds. I'll agree with Peter here.. Skin depth at HF is large enough (about
Stan, Thanks for the addr for the coil calc. Yeah it looks like they got their act together with the Tornado's thanks Stan, Bob K6UJ The Tornado coil is a motorized inductor that compresses or expand
Jim, Thanks for the informative post ! The coils from JK must be the Cadillac of coils ! Bob K6UJ I found this interesting article (below) on the evolution of Force 12's current Tornado loading coil
John, I think they use both fixed and adjustable Tornados. The adjustable on 80 meter yagis. I may be wrong but I think that is what they are doing. Yes I am also glad they no longer use the linear l
Jim, Sounds like copper tubing (without cool-amp) is the way to go. I am impressed with the JK coils. Solid aluminun rod and welded connectors, very nice ! I assume the solid rod coils are pretty rig
I measured my XM-240 coils with a TS-617 Q meter and Q of about 160. It's quite difficult to get a decent connection from the Q meter to the coil. Any R in the connections is seen as lower Q. 73, Rog
With wider turn spacings, capacity between turns is lower and coil Q higher. Centre loading is more efficient then base loading on shortened antennas. Silver plating of coils with cool-amp is for the
I have a EF-180C (86' element lengths) and replaced the linear loading with loading coils, almost exactly the way VE6WZ did his. The coils are located at the fiberglass insulator where the linear loa
With wider turn spacings, capacity between turns is lower and coil Q higher. This statement, often heard, makes intuitive sense. Unfortunately, it is simply incorrect. The capacity between turns the
Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Thu, 7 Jan 2016 03:24:24 -0500
From my experience and memory: I wouldn't say Cool Amp plating is for the birds, but it is a "flash plating", only a few molecules thick. In a power amp, it provides better connections, but is pretty