Name: 1:4 BalUn 600 watt DIY kit 1.8 - 30 MHz
SKU: 1:4BALUN600W
Price: 52.00 EUR
Availability: InStock

1:4 BalUn 600 watt DIY kit 1.8 – 30 MHz

€ 52,00 Incl. VAT

Complete 1:4 BalUn homebrew kit for off-center-fed (windom) antennas, among other things.

600 Watt, with solid strain relief, all stainless steel.

This BalUn is built on two ferrite FT240-43 toroidal cores.

Now with a handy mounting plate for the toroidal cores, so gluing is no longer necessary.

Click here for a detailed building description

In stock

Description

Complete 1:4 BalUn DIY kit for off-center-fed (windom) antennas, among other things.

1:4 BalUn 600 Watt self-build kit 1.8 – 30 MHz, with solid strain relief. This 1:4 BalUn is constructed from two FT240-43 ferrite toroidal cores. On the first toroidal core a 1:1 current BalUn is built up. It takes care of the transition from unbalanced (coax) to balanced antenna. This BalUn has a fantastic common mode current attenuation of over 30 dB. The second toroid is responsible for impedance adjustment from 50 ohms to 200 ohms. Many BalUn manufacturers only look at the impedance matching but forget to look at the common mode current attenuation. This BalUn scores very well on both levels. Now with a handy mounting plate to attach both ring cores, so gluing is no longer necessary.

The 1:4 BalUn 600 Watt can be used for off-center-fed antennas, among other things. The off-center-fed antenna (windom) is a popular multiband antenna. These antennas have many advantages. The antenna can be used on many bands, the antenna is often easy to place due to the 1/3, 2/3 ratio in the antenna legs. By using a good BalUn, Common mode current are prevented, which also reduces interference from your direct environment. This antenna needs no ground or counter capacitance.

The main reason for using a BalUn is to make sure that the coax cable is not part of the antenna system and that it will radiate undesirable. This has all sorts of nasty effects, think of: interference, EMI, RFI disrupted radiation pattern of the antenna, restless noise level. This last point is because not only does the coax cable’s shield radiate when you transmit, but the shield also works as a receiving antenna.

Click here for a detailed building description