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13 votes
Accepted

PL-259/SO-239 vs N Type vs BNC which is best connector to use when?

For shortwave listening, it doesn't really matter – all these connectors are suitable for 30 MHz, and for reception you don't need to work with significant power. PL-259 2m-band If you, however, plan ...
Marcus Müller's user avatar
8 votes
Accepted

How to identify a high quality PL-259/SO-239 (so-called "UHF") connector?

UHF connectors are tricky, because they're not a very good connector by modern standards to begin. They have only a few redeeming qualities: They are common on amateur radio equipment The socket can ...
Phil Frost - W8II's user avatar
8 votes
Accepted

Soldering PL-259.. with a torch?

Our friends in the UK and other parts of the world are now wondering how you could even begin to solder a PL259 connector with a torch (aka flashlight)! But in their vernacular, you of course are ...
Glenn W9IQ's user avatar
  • 18.6k
6 votes
Accepted

Where can one get a "listed" SO-239 lightning arrester?

The NEC defines "listed" as: Listed. Equipment, materials, or services included in a list published by an organization that is acceptable to the authority having jurisdiction and concerned ...
Phil Frost - W8II's user avatar
5 votes

Soldering PL-259.. with a torch?

I've often used a propane torch to quickly preheat PL259s, but seldom for the actual soldering. Once the connector is preheated, it is a quick and simple matter to flow solder into the holes and the ...
Mike Waters's user avatar
  • 8,071
4 votes

How do I know if my coax connectors are good?

So, what your measurement indicates is two things: yep, the thing is somehow connected. The deep dips in the return loss are points when the characteristic impedance of the connector+cable+connector+...
Marcus Müller's user avatar
4 votes

Where can one get a "listed" SO-239 lightning arrester?

If the problem is only that “SO-239 connectors” and “listed” can't be found together but can be found separately, then you should consider using a different connector — SO-239/PL-259/“UHF” is an old ...
Kevin Reid AG6YO's user avatar
  • 24.7k
4 votes

Why do so many HF transceivers use a UHF connector?

The "UHF" connector, as stated, is a hold-over from World War II, and has become an industry standard. A lot of hams "know" how to put them on coax, and, since radio is, overall, forgiving, most don't ...
GerryC's user avatar
  • 41
2 votes

How terminate RG8 coaxial cable using PL259 (UHF) - screw - gasket - solder type?

Following up on Phil's comment, there is a decent cutaway view: Pomona Model 73059 UHF Plug, Clamp Type, RG 8 (mouser.com) Excerpt:
SDsolar's user avatar
  • 2,089
2 votes

Temporary/Portable station coax pl259 connector water proof?

For temporary weatherproofing my coax connectors I use a piece of bicycle innertube and a few cable ties.
ON5MF Jurgen's user avatar
2 votes
Accepted

Temporary/Portable station coax pl259 connector water proof?

For temporary connections, there's small "clamp on" cable boxes, something like: Definitely not "condensation-proof", but "should reduce quite significantly". Other than that, there's people that ...
Marcus Müller's user avatar
2 votes
Accepted

SO-239 (UHF) vs N connector power handling on 160m

The average power rating is determined by overheating of the centre contact and is a function of frequency, as heating depends on the resistive insertion loss. Typical makers curves for a new ...
Duston's user avatar
  • 939
2 votes

Is a UHF connector any real disadvantage off the transmitter circuit board or at an antenna feedpoint?

If you're planning to tune the antenna for best VSWR anyway, then you'll compensate for any transformation that happens in the mated connector pair. A PL-259 - Barrel - PL-259 combination in the ...
tomnexus's user avatar
  • 11.4k
2 votes

Is a UHF connector any real disadvantage off the transmitter circuit board or at an antenna feedpoint?

Addressing the "sad little piece of coax, half of which has been peeled apart so it can be soldered to the PCB and to the connector itself" part... Yes, in HF radios it is common to see the ...
user10489's user avatar
  • 6,485
1 vote

Is a UHF connector any real disadvantage off the transmitter circuit board or at an antenna feedpoint?

A geometric change in a transmission line geometry that is far smaller than 1/10 wavelength can still cause an impedance mismatch, thus reflections at GHz frequencies, thus increase SWR. There are (...
hotpaw2's user avatar
  • 13.5k
1 vote

How do I know if my coax connectors are good?

Per Hobbs-KC2G's comment, you should now try and vary your load resistance, as your load might not equal the impedance of your coax. The procedure below will tell you if that is the case or not. One ...
Mike Waters's user avatar
  • 8,071
1 vote

Temporary/Portable station coax pl259 connector water proof?

Your are rightly concerned about dew infiltrating the connector. This can cause corrosion over time and moisture can build up to the point that short circuits result. But, if you only leave the ...
Brian K1LI's user avatar
  • 7,878
1 vote
Accepted

Terminating double-shielded coax

The short answer is yes, both shields must be connected together. Many other connectors for this already connect the shields for you, providing that you follow the instructions. N connectors (at ...
Mike Waters's user avatar
  • 8,071
1 vote

Soldering PL-259.. with a torch?

I’ve never had to preheat. Pre-tinning the wire and using the appropriate wattage iron or gun has always worked. That and liquid flux. I’ve used swedging irons as well as guns. 60 watt isn’t too ...
Andrew Harman's user avatar
1 vote

Soldering PL-259.. with a torch?

The torch method seems prone to problems as you can't control the heat all that well. Even silver-teflon connectors have their limits. I've had good success using the old solder gun, much more heat ...
user103218's user avatar

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