Rest assured, for our brand of connectors (by W5SWL) that are applicable, we have performed RL (Return Loss testing), insertion loss testing, power testing (to the extent of our capabilities), frequency max, physical make up and usability, etc when we accepted a design and we do continued spot testing as a routine in our well equipped test room. We test against some very popular brand names in the high tech industry to establish what we call good and normal specs.
While we certainly know the detail specs of our connectors the reason we don't publish specific design specs is that we offer our brand line of connectors at a low consumer grade price level and if we did we would have to increase pricing just to chase specs and small variations. Our original goal and decision was to offer consumer pricing levels even though our connectors meet very suitable specs and could easily meet higher price levels.
However, we do have some general design characteristics as shown below for our brand of connectors and devices (adapters with various series ends will differ according to ends) :
Surge Devices - Frequency max is device specific. VSWR 1:1.5 to 1.5 with approximately .15dB to .2dB insertion loss and are typically 50 Ohms unless noted. Power handling according to gas tube, see our other write up on Surge Protector Power Ratings.
N Series - Frequency max is approximately 10 GHz with 1.3 to 1.5 VSWR. Design impedance is 50 Ohms unless noted.
BNC Series - Designed with two impedances, 50 and 75 Ohms. Frequency max is approximately 4 GHz for 50 Ohms and 1 GHz for 75 Ohm. VSWR approximately 1.3 to 1.5.
QMA Series - Frequency max is approximately 6 GHz and 3 GHz (for right angle designs). Designed around a 50 Ohm impedance with a VSWR of 1.15 max.
UHF Series - This series is often debated and expected to do far more than it should. The specs generally are only so good up to about 300 MHz. Designed impedance is stated as approximately 50 Ohms but it will vary widely depending on the particular connector, installation and usage, therefore it is considered a non constant impedance. For the frequencies involved, it generally has acceptable operational characteristics.
SMA Series - Frequency max approximately 18 GHz. Design impedance center is 50 Ohms with a VSWR of approximately 1.3 to 1.5.
Mini-UHF Series - Frequency max is approximtely 2 Ghz with a design impedance of 50 Ohms. VSWR range typical of 1.3 to 1.5.
TNC Series - Frequency max is approximately 4 GHz with a 50 Ohm design. VSWR is approximately 1.3 to 1.5.
7/16 DIN Series - Frequency max approximately 4 GHz and capable of handling somewhat higher power. Design impedance of 50 Ohms with a VSWR of 1.3 to 1.5.
FME Series - Frequency max approximately 3 GHz. 50 Ohm impedance design with a VSWR of approximately 1.3 to 1.5.
SMB Series - Frequency max approximately 4 GHz. 50 Ohm design with a 1.3 to 1.5 VSWR.
MCX, MMCX Series - Frequency max approximately 6 GHz. 50 Ohm design center with a VSWR of 1.3 to 1.5.
We have done connectors long enough to know, as our many and wide range of customers* know as well, that our line of connectors perform quite well and at a affordable price structure. Try one of our brand of connectors, we are easy to get along with should one of our brand of connectors not work to your satisfaction.
*Ham and hobbyist users, US Mil and the Coast Guard, Government (US 3 letter agencies, state, county and local) as well as independent radio shops and equipment manufacturers to name a few.