I already have a balun!
I seem to get this question quite often so I thought I would post the answer with a couple of photos.
Whenever you compare items, especially in the ham community, you know you're walking a thin line. I am not speaking negatively about any particular brand. I am simply pointing out MY experience as well as feedback from customers and actual in the field use.
When I get an email or a phone call, telling me "your antenna won't tune!", I look to the tuner and/or balun they are using.
It's not the antenna. It's the tuner and/or the balun. I have worked with many hams that have swapped out the popular, compact tuner and replaced it with a different brand that seems to have far more range. Problem solved! The small, compact tuners can't be expected to handle the wide range of SWR's present on a 10-160M doublet.
Take a look at the four baluns in the photos and form your own opinion.
Yes, I'm prejudiced as I am a reseller for Balun Designs. I have NEVER heard of any of my customers over the years, complain about one of his baluns.
This first one is RadioWavz
This balun is LDG
This is Radio Works
This is Balun Designs
The terminals in this one have been disconnected for an experiment