also referred to as line isolators, these choke off RF currents on the shield!
These In-Line Baluns have an SO-239 UHF type connector on both the input and output side. In-Line baluns provide similar performance to their respective wire balun counterparts. Applications for In-line baluns include line isolation anywhere along the coax transmission system and use on Quad and Yagi antennas. The W2DU’s RF choke design can be used anywhere along your coaxial transmission path to help eliminate RF feedback and TVI. While the RF currents flowing along the coax shield are “choked” out by the balun/isolator, the internal 50 ohm signal is completely unaffected. Some users have noted a reduction in interference with the use of line isolator between their transmitters (transceivers) and linear amplifiers. Another use is placing one at the vertical, beam, or quad antenna to augment the antenna’s matching system to coax.
Model# |
Description |
MSRP(US)
|
| W2AU INLINE™ |
W2AU -1:1 with Double SO-239 Connectors |
|
| W2DU INLINE-HF |
W2DU – HF Model with Double SO-239 Connectors |
|
| W2DU INLINE-VHF |
W2DU – VHF Model with Double SO-239 Connectors |
|
NOTE: All baluns are available with “N’ connectors, or double S0-239’s when requested.
- Additional charge of $2.00 per connector –
long the standard of the industry the W2AU baluns are built to last!
The W2AU is the preferred Balun of Amateurs worldwide. W2AU’s operate at a low VSWR from 1.8 to 40 mHz, and handle powers up to 2 KW PEP (at SWRs of less than 3:1). W2AU Baluns are transformer designs with ferrite cores to provide 95% minimum coupling efficiency. Each has a built-in lightning arrestor, hang up hook, and 600 lbs of pull-apart strength in a weatherized, rugged package using only stainless steel hardware and quality materials. Two models are available. The 1:1 matches 50(75) ohms unbalanced coax to 50(75) balanced dipoles. The 4:1 matches 50(75) ohm unbalanced coax to 200(300) ohm folded dipoles.
Model# |
Description |
MSRP(US)
|
| W2AU™ 1:1 |
50 ohm-50 ohm or 75 ohm-75 ohm (Transformer Type 1.8 – 40 MHz) |
|
| W2AU 4:1 |
200 ohm-50 ohm or 300 ohm-75 ohm (Transformer Type 1.8 – 40MHz) |
|
W2AU 4:1 LL |
Ladder line / Coax Transition 4:1 Balun |
|
these Baluns can be used on beams and quads!
For matching yagi or quad elements select the Beam models of the famous W2AU or W2DU Baluns. These models are designed to be mounted horizontally to a beam’s boom. Pigtail wires are provided in lieu of the hooks on the wire models to connect these Baluns to the driven element. Specs for beam models are the same as their respective wire models with the exception that the W2AU and W2DU HF beam models only operate from 40 to 10 meters.
Model# |
Description |
MSRP(US)
|
| W2AU 1:1-B |
Beamed Version (Transformer Type) |
|
| W2DU HF-B |
High Frequency Beamed Version (Current Type) |
|
| Add an SO239 |
Additional charge of $2.00 per connector |
|
NOTE: All baluns are available with “N’ connectors, or double S0-239’s when requested.
- Additional charge of $2.00 per connector –