£49.96
ADD TO BASKET
Click the image to enlarge
MFJ-911H Switchable 1:1 or 4:1 Balun
£0.00
(£0.00 exc. VAT)
£59.95
(£49.96 exc. VAT)
Fast uk delivery
Worldwide delivery
Finance Available
Radioworld now offer finance through our partners Close Brothers.
Add the item to your basket in the normal way and at checkout choose to make payment via Finance. You’ll then be taken through to our partners Pay4Later to make your finance application.
| Item Cost | Finance Option | Deposit | Monthly Payments | Total Cost |
|---|---|---|---|---|
£59.95
|
12 Months 14.9% APR
|
£6.00
|
£5.17
|
£67.99
|
£59.95
|
18 Months 14.9% APR
|
£6.00
|
£3.44
|
£67.99
|
£59.95
|
24 Months 14.9% APR
|
£6.00
|
£2.58
|
£67.99
|
£59.95
|
36 Months 14.9% APR
|
£6.00
|
£1.72
|
£67.99
|
£59.95
|
48 Months 14.9% APR
|
£6.00
|
£1.29
|
£67.99
|
£59.95
|
12 Months 19.5% APR
|
£6.00
|
£5.37
|
£70.47
|
£59.95
|
18 Months 19.5% APR
|
£6.00
|
£3.58
|
£70.47
|
£59.95
|
24 Months 19.5% APR
|
£6.00
|
£2.69
|
£70.47
|
£59.95
|
36 Months 19.5% APR
|
£6.00
|
£1.79
|
£70.47
|
£59.95
|
48 Months 19.5% APR
|
£6.00
|
£1.34
|
£70.47
|
The MFJ-911H is a true 1:1 or 4:1 current balun/unun designed for indoor use. It uses large low permeability ferrite cores to transform 200 or 50 ohm balanced or unbalanced loads to 50 ohms. It is rated at 300 watts with relatively flat response from 1.8 to 30 MHz. Its SO-239 coax connector makes it easy to connect a coax cable. Two-way binding posts with standard spacing are provided for convenient hookup. A slide switch allows switching between 1:1 and 4:1
transformations. A current balun can reduce or eliminate stray RF often found on coax. This stray RF can cause
burns and other problems with electronic equipment while reducing antenna radiation.
Installation of an MFJ-911H balun can increase the efficiency of any amateur station.
INSTALLATION
1. The MFJ-911H is intended for applications
protected from the elements – out of the weather.
2. For use as a balun (balanced load to unbalanced)
connect the balanced feed line to the red binding
posts and the coaxial cable to the SO-239 coax
connector.
3. For use as a unun (unbalanced load to unbalanced),
install a jumper as indicated on the unit. Connect
the unbalanced feedline to the binding posts,
ensuring that the center conductor is connected
to the binding post that is not grounded and the
shield is connected to the grounded binding post. s.
Others who viewed this item WERE ALSO INTERESTED IN...
MFJ-915 RF Line Isolator 1:1 Current Balun 1.8-30MHz 50 Ohms
The MFJ-915 Line Isolator has been designed to be placed in line with 50 Ohm coaxial cable to reduce or eliminate stray RF. This stray RF can be a maj...
£49.96
£32.95
ADD TO BASKET
LDG RBA-1 1:1 Balun
The RBA-1 1:1 Balun was designed to allow easy interface of ladder line antennas and long wires to the LDG line of Automatic Antenna Tuners. The Balun...
£32.95
£39.95
OUT OF STOCK
Diamond BU-55 50 Ohm Balun
The BU-50 is a 1:1 50 Ohm HF balun covering 3 to 75MHz. It will handle 500W PEP and helps reduce feed line radiation and radiation pattern distortion....
£39.95
£27.95
OUT OF STOCK
MFJ-911 4:1 Balun 300W
The MFJ-911 4:1 Balun is a true 4:1 current balun/unun that transforms 200 ohm balanced and unbalanced loads to 50 ohms. The response is amazingly fla...
£27.95
£39.95
ADD TO BASKET
COMET CBL1000 1Kw balun 1.7 - 30 MHz
Comet CBL1000 is a newly designed high power model, rated up to 1Kw, with an HF frequency range of 1.7-30Mhz. The output connector is the usual SO239...
£39.95
£46.96
OUT OF STOCK
T-4-500 Radio Works 500W 1:1 Line Isolator
The T-4-500 Line Isolator compliments the line of Radio Works current Balun. Built to a high standard, the sockets are in fact silver plated with gold...
£46.96
£32.95
OUT OF STOCK
MFJ-913 4:1 Current Balun 300W
The MFJ-913 4:1 current balun is ideal for folded dipoles, delta loops or other medium impedance balance antennas where ATUs are not required.
* Cur...
£32.95
£77.95
OUT OF STOCK
MFJ-912 W9INN Ext Balun
MFJ-912 W9INN Ext Balun The use of this balun allows you to employ ladder line as the main feed and so take advantage of the very low loss that result...
£77.95
£39.95
ADD TO BASKET
HB-6-200 HARI Balun 6:1 50 Ohms 200W SSB/CW
HB-6-200 HARI Balun 6:1 50 Ohms 200W SSB/CW Top quality 6:1 balun for use with folded dipole type antennas with feed point of 300 Ohms. Power rating ...
£39.95
£36.95
OUT OF STOCK
MFJ-917 SWR Analyzer Current Balun
The MFJ-917 1:1 Current balun.1:1 Current balun lets you use SWR and Antenna Analyzers on balanced line antennas and other loads. 1.8-30 MHz.
£36.95
£33.98
ADD TO BASKET
LDG RBA-1 4:1 Balun
The RBA-1 4:1 Balun was designed to allow easy interface of ladder line antennas and long wires to the LDG line of Automatic Antenna Tuners. The Balun...
£33.98
£29.95
OUT OF STOCK
WB-1 Watson 1:1 Balun
WB-1 Watson 1:1 Balun * 1:1 balun 50 Ohms SO-239 * 3 - 30MHz 400W input * Strain loops and element clamp (14 gauge) * For wire dipoles or inverted V ...
£29.95
£95.00
ADD TO BASKET
Windom Balun Length 42m, for 80/40/20/17/12/10m, 1000 W
Well renowned antenna for the harmonic bands 80, 40, 20, 17, 12 and 10m. Somewhat more bandwidth then a dipole, good SWR on all bands. At space restri...
£95.00
£24.95
OUT OF STOCK
Watson Receive Long Wire Balun W-LWB-MK11
The Watson W-LWB-MK11 Receive Long Wire Balun Use with a random length of wire to convert impedance down to 50 Ohms to match your receiver. Makes a bi...
£24.95
£29.95
ADD TO BASKET
Radioworld 1:1 Current Balun RB-1 400W
1:1 Current Balun, Features: Frequency :1-30MHz, Power : 400 Watts, Independence : 50 Ohms, Connection : SO239 for cable 2 x brass terminals for wire.
£29.95
£66.95
ADD TO BASKET
MFJ-919 4:1 Current balun 1.5kW
The MFJ-919 4:1 current balun rated at 1500W is ideal for folded dipoles, delta loops or other medium impedance balance antennas where ATUs are not re...
£66.95
£30.95
ADD TO BASKET
HB-4-200 HARI Balun 4:1 50 Ohms 200W SSB/CW
The HB-4-200 HARI Balun 4:1 50 Ohms 200W SSB/CW Top quality encapsulated 4:1 balun for use with quad antennas with feed point of 200 Ohms. Power ratin...
£30.95
£59.95
OUT OF STOCK
B4-2K Radio Works 1.5kW 4:1 Balun
The B4-2K 4:1 voltage balun is ideal for folded dipoles, delta loops or other medium impedance balance antennas where ATUs are not required. * Voltage...
£59.95
£54.95
OUT OF STOCK
Radioworks 5kW 1:1 Yagi Balun Y1.5K Plus
The Y1.5KPlus This precision built, high performance Yagi Balun is ideal for use with all directly fed Yagi antennas (but not those that already have ...
£54.95
£69.95
OUT OF STOCK
REM-BAL (REMOTE BALUN) Radio Works 1.5kW 4:1 Remote Balun
The REM-BAL is a 4:1 current type balun and is ideal for open wire to coax interfacing, especially external to the operating position. Unlike voltage ...
£69.95