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shadle's photostream |
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calculated impedance for 136 uH choke
This choke's inductance was measured using an AADE L/C IIB to be 136 uH. Using the formula Z = 2*pi*L*f,...
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Uploaded on Sep 20, 2010
insert SO-239 "wrong side in" to help with drilling holes for #4-40 bolts
bolt holes drilled for #4-40 hardware
final product! continuity checks out okay, too
preparing to drill the box for SO-239
FT240-43 wrapped in Scotch #27 tape
This helps prevent nicking of the bifilar wire and allows for more "grip" between the wire and the core.
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Uploaded on Sep 19, 2010
halfway there, and then the crossover
Crossover technique allows for the input and output to be at opposite sides of the core, without having to...
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Uploaded on Sep 19, 2010
shot with extra length (I used 33", but could have gotten away with less)
Panavise holding the pair of #14 AWG wires for binding
One wire has been covered in Scotch #92 polyimide film to help bring the impedance of the bifilar winding...
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Uploaded on Sep 19, 2010
RF choke
20 photos
346 views
1 comment
fence antenna
5 photos
35 views
2010 National Champions
67 photos
156 views
2010 Duke @ UNC
65 photos
43 views
159 Windstone
22 photos
8 views
San Jose & San...
6 photos
24 views
