On 7/21/22 9:17 AM, Roy J. Tellason, Sr. wrote:
On Wednesday 20 July 2022 03:58:49 pm Jim Lux wrote:
If you must, SO-239 / PL-259 connectors are *only* for HF use. ?Their
impedance is NOT controlled as are the other referenced RF connectors.
True, the UHF connector isn't constant impedance, however, if you have a
set of calibration standards in UHF, then that is managed in the
calibration.
Some time back I acquired a cable with connectors on each end that resemble PL-259s, but are *much* smaller. Anybody know what these are, and what sort of equipment is likely to use them?
There's a mini-UHF that I've seen on things like land mobile VHF radio, and on older cell phones (instead of a TNC). Unlike the PL-259, it's actually designed for constant impedance. It's really more of a Mini-TNC, but it has that serrated edge on the jack, and a TNC is a smooth edge.
Tessco
