9 1 Balun Ham Radio,91 balun end fed Antenna Receive high Power Feed hf Portable shortwave Radio Antennas ham Used radios 50 ohm Connector Shark Discovery

Nine to one Ubun works fine

I have purchased 6 of these Ununs in two batches of (3). I have tested each of them with a 450 ohm load across the screw hardware, and a VNA on the coax input. Typical VSWR has been 1.15:1 across 3-30 MHz, with worst case of 1.3:1.Only 1 UnUn measured with a 4 to 5:1 VSWR. A bad solder joint was found and corrected. Repaired unit has satisfactory VSWR now.Would recommend for purchase for <100w stations using EFRW antennas.

This thing is actually decently made. Other comments say to check the solder on the inside and mine looks pretty decent. I checked it against 234 feet of wire and it seems to hold up nicely, pretty good sweep too.2 things I don’t like about it. 1, the case is not waterproof and is thin plastic. I’m worried being out in the sun and weather may crack it. Which is my 2nd point, the SO239 connector on the bottom is very short. I put it in a small NEMA box and cut a hole for the SO239 to fit through. With that and a nut, the coax doesn’t fit well. My next plan is to mount it in the center on the box and extend the connector down with an adapter or two. There’s also not any strain relief on the unit, so be mindful. The core is glued in place pretty sturdy so removal would be rebuilding it.All in all, for quick and portable temporary deployment, this would be perfect for a random wire. For permanent, it takes a bit of modification but it still works just the same

I used this on a an end fed random wire antenna about ~120ft long with the center raised about 30'. The SWR across the band measured by my X6100 SWR scanner was over 6:1 with few usable dips. Removing it and just using a binding post to BNC connector dropped it down to 3:1 which was within the range of the built in tuner. For the price, it's hard to see where there is 12 dollars worth of parts in it, and I had to bend a few wires away from other wires to prevent a short. Maybe there's some mystical woowoo juice in it that makes it useful for receive only. It's not worth sending back, so I'll maybe re-wind it on a known good mix.

Good quality, still working on stringing it up on my tower.

I picked this up because I wasn't really sure I could build a 9:1 without spending a lot of time fixing my mistakes. When I got this I found that every connection point was loose, all the solder joints were ugly and on the verge of snapping, and it was performing very poorly. This balun is effectively garbage as shipped.On the other hand....When you buy this, you're not buying a finished balun. What you buy here is a kit that's roughly assembled in order to give you a visual guide as to what it should look like when it's finished. While it might seem odd to do this instead of giving an actual instruction sheet, this kit actually works to help you find the confidence and motivation that you might not have otherwise.I shouldn't bash the manufacturer for selling a broken and defective product, I should be thanking them for teaching me that so much of the radio hobby is about building things myself.

I got two of these units for building an end fed antenna. The one built for qrp (10 watts) works great, but the other one did not appreciate using100 watts and torrid cracked. Definitely should be for QRP ops only!

Nicely constructed ..compact..and timely shipping!