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 –
W2DU Baluns use a ferrite sleeve to choke RF current on the cable shield!
The W2DU Maxi-Baluns owe their extremely high power capability to the fact that they contain no ferrite cores to saturate. Even at high SWR levels, the W2DU Baluns won’t generate harmonic radiation. The internal feed line passes through ferrite beads which prevent RF current from flowing on the coax shield.
Two 50 ohm 1:1 models are available; HF (1.8-30 mHz) and VHF (30-300 mHz).
- At 10 mHz, the HF model handles over 10 KW PEP at VSWRs up to 2:1.
- At 200 mHz, the VHF model handles over 3.2 KW PEP at VSWR’s up to 2:1.
Each W2DU Balun 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.
Model# |
Description |
MSRP(US)
|
| W2DU™ HF |
1.8 – 30MHz (Current Type 1:1 only) |
|
|
| W2DU VHF |
20 – 300MHz (Current Type 1:1 only) |
|
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 –