radio. My approach, when discussing baluns, is to present the "balun" as a "function," not necessarily a "thing." The balun "function" is to transfer power between balanced and unbalanced systems wh
Why must a balun provide isolation? how can a coil of coax be considered a balun as there is no isolation of the currents on the inside of the coax provided like there can be with a transformer. Davi
A coil of wire is an inductor with an air core and the principle of of a inductor will still apply. However an air core inductor will not be as efficient as an inductor with a core depending on the
Hi Ward, The problem is that all of these "things" work better or worse than others, are more or less frequency-sensitive than others, and have unintended consequences. For example, the coil of coax
The inductance of a coil of coax is in series with the rest of the transmission line, and if that line looks capacitive (by virtue of its length), the coil of coax DOES NOT WORK to provide isolation.
Exactly. My approach, when discussing baluns, is to present the "balun" as a "function," not necessarily a "thing." The balun "function" is to transfer power between balanced and unbalanced systems w
Sadly, it seems little is known about how to handle balanced line outside the vintage radio community. QST doesn't help. The Doctor Is In column does anything and everything it seems, to get hams to
"The inductance of a coil of coax is in series with the rest of the transmission line, and if that line looks capacitive (by virtue of its length), the coil of coax DOES NOT WORK to provide isolation
This statement I would debate.... mainly the 'by virtue of its length' statement... that starts mixing the lumped component (coil) with a transmission line model. David, Looks like you still haven't