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VK5ZVS |
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Projects 'n' Stuff |
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Baluns for 25 and 150 ohm |
Another balun box ready for use.
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The various baluns are made with 2 x ferrite cores,
Jaycar LF1258 taped together to form a figure eight core (side view). The wire used
is from Category 5 data cable. The type of wire provides good insulation between wires
and allows the correct amount of interwinding capacitance between the turns to give us the desired
response characteristics we're looking for in a balun.
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Here's the Smith chart showing the impedance from 1 to 30MHz.
The marker is at 3.6MHz.
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Here's the VSWR from 1 to 30MHz.
The marker is at 3.6MHz.
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Here's the Smith chart showing the impedance from 1 to 30MHz.
The marker is at 30MHz.
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Here's the VSWR from 1 to 30MHz.
The marker is at 30MHz.
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