I realize Remtronix Antennas differ in physical qualities ( IE: Straight, L-Shaped, BNC, SMA, Etc. )
With that being said would all Remtronix Antennas be the same in quality and ability to resolve my issue of poor receiving signal for a 771.70625 freq. on an HP-2?
OR, would some models be better in doing so than others?
I believe that as for the antenna itself, all three versions should be the same. The antenna with "elbow" (the swivel joint) might have slightly less performance since the swivel is a "connector" between the antenna and it's connector. However, it likely would not be enough of a difference to notice. Other than the combination adapter noted below, you're going to have two connections between the scanner and the working part of the antenna.
If you bought your HP-2 new, you should have received an SMA Mail to BNC female with it. Sometimes it's esay to overlook, as it's stuck in a fold or pocket of the cardboard packing that keeps the scanner secure during shipping. If you don't have that adapter, then you'd need to purchase one.
The adapter that maus92
linked above in post 43 would work to adapt the scanner. However, I prefer one like this, from Amazon.
Amazon.com: DHT Electronics 2pcs RF coaxial Coax Adapter SMA Male to BNC Female goldplated: Electronics
www.amazon.com
(The Remtronix antenna with the swivel end was not available when I acquired the HP series scanners.)
That one screws down flat on the scanner, giving it more support. The adapter that Uniden
ships with the scanner looks like that, but with a silver color. I like this one that Universal Radio sells. It's black color makes it look like part of the scanner when tightened down (item #0292 on
this page). That's what I use on my HP-1 & HP-2, along with a 90 degree BNC male to BNC female. While that is "two connections", there is not enough loss to matter. I'm not missing anything that I should be able to hear because of the potential loss of signal strength caused by inserting the adapters.
This combination adapter, that I linked in a previous post, has the SMA male to connect to the scanner, an elbow, so that the antenna can be adjusted vertically when sitting in it's holder or on a desktop, and the BNC female end for the antenna.
SMA Male / BNC Female RIght Angle Adapter
www.k1cra.com