On 6/25/2018 10:35 PM, Avery Davis wrote:
Would you please share a link to a source that discusses the limits of N
connectors? Everything I have seen so far suggests they have as good or
better power handling at low frequencies than the PL-259, and are much
better at UHF as they are constant impedance (lower loss, higher power,
lower SWR). For example, Amphenol rates their SO-239 at 500 V, while
their Type N is rated at 1500 Volts. That sounds like better power
handling, to me.
Only under the conditions of ridiculous SWR for legal limit power in the
US. 500V at 50 ohms is 5kW, and 3.3kW at 75 ohms. GOOD QUALITY UHF
connectors are plenty good enough at 6M and below unless you're running
illegal power. Anyone who argues otherwise failed his course on
transmission lines. Yes, UHF connectors are not 50 ohm connectors, but
below UHF, any loss resulting from the small discontinuity they
introduce is too small to matter below 150 MHz.
My station is standardized on UHF connectors. When I NEED N-connectors
to mate with equipment, I use a very nice 2-piece connector developed by
Andros Engineering. Unfortunately, their website is SNAFU. Both center
and shield are soldered. It's like a PL259 -- soldered connections are
to one plece and the other piece is the screw-on retainer.
For either connector, good weatherproofing is critical if you live where
it rains. Where I live it rains a LOT!
73, Jim K9YC
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