Mfj-912 W9inn Ext Balun is a high-quality balun designed for use with antennas.
Click the image to enlarge

MFJ Enterprises

Mfj-912 W9inn Ext Balun is a high-quality balun designed for use with antennas.

£0.00
(£0.00 exc. VAT)
£86.56
(£72.13 exc. VAT)
Fast uk delivery
Worldwide delivery
In Stock
Qty:


0 Reward points
Product code: MFJ-912
Download a pdf document for Mfj-912 W9inn Ext Balun is a high-quality balun designed for use with antennas.

Want to be notified when this product is back in stock? Complete the form below and we'll send you an email when it is.

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 CostFinance OptionDepositMonthly PaymentsTotal Cost
£86.56
12 Months 14.9% APR
£8.66
£7.46
£98.16
£86.56
18 Months 14.9% APR
£8.66
£4.97
£98.16
£86.56
24 Months 14.9% APR
£8.66
£3.73
£98.16
£86.56
36 Months 14.9% APR
£8.66
£2.49
£98.16
£86.56
48 Months 14.9% APR
£8.66
£1.86
£98.16
£86.56
12 Months 19.5% APR
£8.66
£7.76
£101.75
£86.56
18 Months 19.5% APR
£8.66
£5.17
£101.75
£86.56
24 Months 19.5% APR
£8.66
£3.88
£101.75
£86.56
36 Months 19.5% APR
£8.66
£2.59
£101.75
£86.56
48 Months 19.5% APR
£8.66
£1.94
£101.75

Click here to recommend this product to a friend

Recommend a friend

Mfj-912 W9inn Ext Balun is a high-quality balun designed for use with antennas.

Mfj-912 W9inn Ext Balun is a high-quality balun designed for use with antennas.


The MFJ-912 W9INN Ext Balun is precisely engineered to facilitate the utilization of a ladder line as the primary feed, capitalizing on its minimal loss properties. By linking the ladder line to the two sizable insulators on the balun device, the resultant output is directed to the transceiver through a 50-ohm coaxial cable. This configuration ensures notably low losses, even over extended distances of balanced lines. With dimensions measuring 125 x 78 x 55mm, a power capacity of 2kW, and a ratio of 4:1, this balun unit is optimized for efficient performance in various setups. 

The design of the MFJ-912 W9INN Ext Balun emphasizes the seamless integration of the ladder line, a key component known for its superior transmission capabilities. By establishing a connection between the ladder line and the two prominent insulators on the balun, the subsequent transmission to the transceiver via a 50-ohm coax cable is achieved with precision. This strategic approach minimises losses and ensures consistent signal quality, mainly when dealing with extensive lengths of balanced lines. Boasting a power rating of 2kW and a 4:1 ratio, this balun unit balances efficiency and reliability in diverse operational settings.

Measuring 125 x 78 x 55mm, the MFJ-912 W9INN Ext Balun is a compact yet robust solution for harnessing the advantages of ladder line configurations. Its ability to handle power up to 2kW, coupled with a 4:1 ratio, underscores its versatility and effectiveness in supporting high-performance setups. By enabling the seamless transition of signals from the ladder line to the transceiver through a 50-ohm coax cable, this balun unit stands out for its ability to deliver exceptional performance with minimal losses. Whether used in amateur radio setups or other communication systems, the MFJ-912 W9INN Ext Balun is reliable for optimizing signal transmission efficiency.

All orders placed on this website will not be subject to VAT for customers residing in the European Union or the rest of the world. However, it is important to mention that VAT will still be applicable based on the rates set by your country upon delivery.

Our Price Match Promise means that if you find any of our Equipment at a lower advertised price elsewhere, we will match the price for you, subject to the below.

  • The product is identical to ours in brand, colour, size and model number.
  • The price must be the advertised price clearly on the competitor's online site.
  • The item must be in stock and available for immediate purchase (rather than available to order), with the authorised stockist able to complete delivery within 2-3 days.

Please fill out the form below. The details will be used to help us with your price promise request.

Your Details

Competitor Product

Weblink showing other retailers product at a reduced price, in stock and ready for dispatch

Product Details