Experiments with Transmission Line Baluns

#207 In this video I continue looking at the transmission line baluns we analyzed last time by building and testing them out. Just to keep things simple, and working at low frequency, I build these form meters of cable, but as with any good experiment - not everything goes according to plan...

Balun series:

Further reading:

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[StreakyP]

my concern is what happens in the amateur radio world where we have a 4:1 half wave transmission line balun feeding the balanced 300ohm folded dipole... BUT UP AT THE ANTENNA THERE IS NO EARTH/GROUND AVAILABLE AT THE BALUN TO GROUND THE CO-AX SCREEN TO SO IT GETS LEFT FLOATING. How does this mess things up?.

[ghlscitel]

Great presentation!
Did you ever simulate a broadband coax balun wound around a toroidal core to function as a sheath wave choke with LTspice?

[demindor]

Also, a question. How did you specify the L parameter instead of Td parameter? LTSpice help file says that the length is derived from Td. And for lossy transmission line it's called Len, not L (L is for the inductance per unit length).

[xDRTeK]

My friend, i think it's time you jumped to ADS for this experiment.