A balun is short for "balanced to unbalanced" and refers to a device that converts a balanced line into an unbalanced one, and vice versa.
In amateur radio, it is used to connect an antenna, which is usually balanced (tuned), to an unbalanced transmission line, such as a coaxial cable.
A balanced line is a two-wire line with no ground connection, while an unbalanced line, like a coaxial cable, has one of its conductors connected to ground.
It also blocks sheath currents.
The balun must be protected against weather, humidity and water ingress.
It also blocks sheath currents, which can cause interference in radio communication systems.
Duct currents can sometimes be strong enough to damage radio equipment.
Each type has its own advantages and disadvantages, and the choice of the appropriate balun will depend on the specific application.
Numbers such as 1/1, 1/4, 4/1, 1/9, 9/1 refer to the balun's transformation ratio. This ratio indicates the relationship between antenna impedance and transmission line impedance.
Reference: PST-5KW-2533
Features :Balun 1:1, 5 KW pep, ferrite core, suitable for wired dipoles Bandwidth 1-30Mhz SO239 Complete with connection cable
87,95 €
Reference: PST-5KY-2534
Features :Balun 1: 1 5 KW pep, ferrite core, suitable for rotary dipoles and yagi Bandwidth: 1-30Mhz SO239 Complete with connection wires, jumper
84,21 €
Reference: M0CVO-41QRO-1883
Balun 4:1 QRO for very high power M0CVO Antennas for Windom antennas, dipoles, fed loops or folded off centre. RF power of 1kW, for intermittent amateur use and not for continuous AM broadcast use.
62,27 €
Reference: M0CVO-11QRO-1886
The 1:1 M0CVO very high power RF balun of 1kW (CW) and 1.2kW (PEP)*. It is used to adapt a balanced antenna, such as a dipole, to an unbalanced feed such as a coaxial cable. It also reduces the amount
62,27 €
Reference: PST-1-5KW-2532
Characteristic :Balun 1:1, 1.5 KW pep, ferrite core, suitable for wired dipoles Bandwidth 1-60Mhz SO239 Complete with connection cable
59,16 €
Reference: PST-1-5KY-2531
Features :1:1 balun on ferrite rod, suitable for rotary dipoles and yagi Maximum power: 1.5Kw SWR: 1.1 1-52Mhz SO239 Complete with connection wires, jumper.
52,77 €
Reference: M0CVO-91UNUN-1882
The M0CVO 9:1 UNUN Balun operates from 1.8 to 54MHz and supports up to 400W CW or 500W PEP in SSB. It provides a power point for a long-wire radiating element and converts the 450Ω (+/-) impedance to
39,92 €
Reference: M0CVO-41BALUN-1879
The M0CVO high power 4:1 Balun operates from 1.8 to 54MHz. It supports up to 400W CW or 500W PEP in SSB. It is used to convert the 200Ω impedance seen at the feed point of a bent or off-centre fed
38,25 €
Reference: M0CVO-11BALUN-1878
The M0CVO high power 1:1 Balun operates from 1.8 to 30MHz. It can handle up to 400W CW or 450W PEP in SSB. It is used to match a balanced antenna, such as a dipole, to an unbalanced feed such as
38,25 €
Reference: DIAMOND-BU50A-517
Diamond BU50/A balun 1:1, genuine, operates from 1.7 to 40Mhz and allows to receive and transmit on HF bands.Technical data sheet of the HF BU50A balun:● Operating frequency from 1.7 to 40MHz●
30,69 €
Reference: NOO-100806-BALUN-ONENINEV2-2538
Small 9:1 balun/unun (38 mm x 25.0 mm) designed to connect long wires and HF dipole antennas to your SDR HF radio, radio or Ham It Up HF upconverter. Assembled in a bespoke aluminium housing, it
27,00 €
Reference: RFKONNECT-ANTENNE-81T403-2191
Balun portable 9:1 Antenna Balun SDR Receiver Accessory with 16.5m red wire and 10m blue wireSpecification:- Maximum power: 10W- Red wire: 16.5m- Blue wire: 10m- Weight: 335gIncluded in the package:-
24,10 €
Reference: DIAMOND-BU55-538
Genuine Diamond BU55 balun 1:1, operates from 3 to 75Mhz, allows to receive and transmit on HF bands + 6 meters (50Mhz).Technical data sheet of the HF BU55 balun:● Operating frequency from 3 to 75MHz●
23,25 €
Reference: NOO-100814-BALUN2-907
The new version Nooelec Balun 1:9 v2 allows to add a wired or dipole antenna type to listen HF bands from 0 to 30Mhz from the Ham It Up converter, an SDRPlay receiver or equivalent covering the HF
20,24 €
Reference: NOOELEC-100652-BALUN-HF-298
This balun is the perfect accessory to connect a long wire antenna, for example with the converter HF SDR Ham it Up to listen shortwave and HF bands from 0.5 to 30Mhz, but this balun can work up to
15,72 €
Reference: RFKONNECT-FERR13MM-81T606-2216
13mm Black Ferrite Choke Balun for EMC Demagnetization Filter Anti-interference Device Clip-on VersionDescription:- It can filter high frequency noise, pulse interference from connection circuits.-
2,40 €
Reference: RFKONNECT-FERR7MM-81T607-2217
7mm Black Ferrite Choke Balun for EMC Demagnetization Filter Anti-interference Device Clip-on VersionDescription:- It can filter high frequency noise, pulse interference from connection circuits.-
1,60 €
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