Hari SymBal Choke for Parallel Wire Cable
In stock, shipped in 1 to 2 days
- for parallel wire of any impedance
- max. 120 or 1000 W SSB(/CW
The SYMBAL common mode choke for parallel wire feed (symmetrical two-wire
line, aka twin wire) of any impedance is to coaxial cable what the common mode choke is
to coaxial cable. It can be looped into the twin wire at any point,
the transmission ratio is 1:1. This common-mode choke is offered in two
power classes - max .120 W and max. 1000 W. Depending on the placement
of the common-mode choke in the current or voltage maximum of the
parallel wire line, the blocking attenuation values can vary.
In order to prevent undesired equalising currents even with parallel
wire lines, a symmetrical choke with a transmission ratio of 1:1 is fed
into the line. The width (i.e. the impedance) of the ribbon cable and
the length of the dipole are not decisive, because the antenna is tuned
as a complete unit (dipole, feed line, choke, tuner).
If no balanced tuner is available, an ordinary coaxial output on the tuner can also be used if a balun, e.g. 1:1 (trifilar wound voltage balun) or a 1:4 balun (bifilar wound) is connected in between.
Alternatively, this choke is also available as a centre section for a dipole with parallel wire feed.
|Hari SymBal Choke for Parallel Wire Cable
|> 20 dB
|1.8 - 30 MHz
|Type of balun
|Current Balun (Choke)