1 9 Mini Balun, Antenna for Outdoor QRP Shortwave Radio Receivers Suitable HF Shortwave Ldg 9 1 Unun Station and Furniture.

Works - as in it matches my random-length bit of wire to my tranceiver - but awful build quality with dubious looking toroid and poor soldering. Wouldn't want to put much more that 10w through this.Recommend you open the box and tighten all the connectors or you'll discover that if you ever need to remove the coax the socket will turn with the plug and destroy the interior. Even better might be sling the toroid and wiring and use this a project box with your own toroid to build something a bit more solid.

Works as it should after fittings were tightened up, not great quality but ideal for indoor or portable antenna.

1 9 Mini Balun, Antenna for Outdoor QRP Shortwave Radio Receivers Suitable HF Shortwave Ldg 9 1 Unun ....This is a 9:1 Unun, the description in the listing has obviously been done by someone who doesn’t know what this is. For those in the know, this is a 9:1 Unun and not a 9:1 Balun. The equipment end is a 50-ohm SO239 unbalanced coax connector, and the antenna side is 450 ohms unbalanced. Internally this is made from a small, what appears to be an FT68-43 toroid with a trifilar winding of 6 turns.I was a bit doubtful of the impedance as I am used to around 9 or 10 turns for a 9:1 Unun, however checking with a NanoVNA and 450-ohm load shows a good match down to 50 ohms +- 5 ohms over a 2-30Mhz range. The SWR remains below 1:1.5 from 2Mhz to beyond 30Mhz and below 1:2 down to about 1Mhz.This is a QRP device, I wouldn’t run more than 10W SSB through it, but it is better suited for SWL use above 2Mhz. Having just purchased a portable SW receiver, this will be idea with a random length of wire whilst out and about.

I've used this for a long wire antenna for 160m and 80m and it's fine, it's basically just a homebrew toroid balun in a bog standard ABS case. I suppose the price is about right, but if you know what a balun is and why you would need one, you can probably make your own for less.