The term "reverse SMA" gets misused when talking about Chinese radios. There is such a thing as a "reverse" connector but it's not what 99% of those using the term really mean. NO Chinese radio that I know of uses a "reverse" connector.
All radios I sell have the same connector gender. The radio has a threaded recess with center pin.... SMA Male. The antenna has a threaded stud with center hole... SMA Female. These are "standard" connectors. "Reverse" connectors would have the "pin" and "hole" switched around.
The SMA connector consists of a threaded outer part (1/4-36) and an inner part that has either a "pin" or a "hole". The threaded part has nothing to do with the gender of the connector. The gender is determined by either the "male" pin or the "female" hole. On a standard SMA connector having a "threaded stud", it will have a hole, making it a SMA Female connector. This SMA Female will screw into a "threaded recess" with a center pin, which is a SMA Male connector.
So what is a "reverse SMA" connector? It has the same threaded part, but the interior of the connector is the opposite. For example, a threaded stud with a center pin would be a reverse SMA female connector. A threaded recess with a center hole would be a reverse SMA male connector.
If you order the wrong connector,
you will have to pay postage BOTH directions for an exchange
I wound up with one of these in SMA-F and one in BNC. I've also got a Diamond SRJ77CA (SMA-F version of the 77CA antenna). The one I now carry everywhere is the BNC version of this antenna, and I prefer it to the Diamond.
I've given away the SMA-F version to another ham with limited financial means, and he finds it has greatly improved his ability to hit repeaters while riding public transit.
Performance-wise, it's pretty much identical so far as I can tell. I see no reason to pick up the Diamond FR77CA at higher price.
No antenna is a magic bullet, and obviously you could connect a better (and physically longer) antenna to this radio. This one is about as long as is practical to carry and use, though, and it works as well as you could possibly expect any antenna of its size to do. If you've got a very good line of sight to a good repeater, you could expect your little Wouxun to communicate 40+ miles and be copied at the other end. A little scratchy, but they heard me at 44.3 miles away.
I've pretty much permanently attached my BNC adapter to the radio now, carefully torqued nice and securely. Having done so, the BNC version swaps with my other antenna options in literally a second, so I'd recommend going that route, personally.
The least to say would be that Wouxun.us is my new favorite site. I have no clue why I would order from some foreign country and wait weeks for an item, when it only takes 2 days to get to my front door from this company. The antenna works great. I was barely able to hit a repeater with my rubber duck antenna, but once I hooked this up with the BNC connector, I was able to hit a repeater about 20 miles from my house and have a conversation when I was on the highway. It's great.
I have the UV6D V2.5 and the original antenna did ok for in town repeaters. I bought this one and WOW! I hit em 30 miles away! Don't think that's such a great big deal? I live in the valley of the Cumberland plateau here in Tennessee. It IS a big deal to hit those repeaters that far away~
I bought this antenna in BNC style along with the BNC Connector and the Dual Band Mobile Antenna all for my Wouxun KG-UV6D HT. I am happy with the set up, the flexibility it allows, and the added signal strength. I ordered a second set for my son as well. While I do not know this seller, I was impressed with the quick shipping and his immediate response to correct a small error with my order. Great customer service!