[600MRG] Loading Coil with a Tuning Disc in the center

[Andy - KU4XR]

Hi all:

Thanks for the replies, most were off list, and I got the answer about the Inner Disc. It electrically shorts a turn on
the coil as it passes between 2 turns .. A very small - Lowering of the Inductance ..

73 all:

Andy - KU4XR


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On Sun, 5/6/18, Andy - KU4XR via 600MRG <600mrg at mailman.qth.net> wrote:
 
 Hi all:
 
 I just obtained a Loading Coil from a
 Gates ATU. The coil has a movable " Disc Plate " inside the
 coil.
 The Coil was mounted with the tuning
 shaft going through the bottom of the box, and the tunable
 end was grounded.
 Since it has no effect on Inductance
 when adjusted, can I assume that the disc varied Capacitance
 when mounted
 inside the GATES tuning unit box ?
 Below are a couple of links to pics of the coil : Thanks for
 replies :
 
 https://www.dropbox.com/s/mwi4merqyc1s3lw/Coil_and_Tuning_Shaft.jpg?dl=0
 
 https://www.dropbox.com/s/4vg56781g4tn470/Coil_and_Inner_Disc.jpg?dl=0
 
 73: Andy - KU4XR