4:1 9:1 16:1 UnUn 250w

A multi-ratio UnUn for use on HF (1.8-30MHz) with up to 250w RF power.  Sometimes, a single ratio just isn't enough if you're changing bands or out /P with different lengths of wire.  The 3 ratios allow you to easily find a better match to your radio/tuner - thus bringing the impedance down to a more suitable level for your ATU.

The 31-mix ferrite is more suited to the lower HF bands (below 15MHz).  43-mix is best for 5-30MHz.

Use of counterpoise/radials is advised.

• 4:1, 9:1 and 16:1 taps
• Choice of FT240-43 or FT240-31 core
• Use with random end-fed wire or vertical - or see our End-Fed Halfwave Coupler
• SO239 coax input and M4 (4mm) terminals for aerial+counterpoise
• 80x85x55mm
• Sealed with potting-compound - fully weather-proof
• All fixings are stainless-steel
• Weight: 300g

We like CB19917 from CPC for our aerial wire