I had an N-type double female coupler in the feedline to a 75 meter
sloper short. Whether it was from an excursion far from resonance
running the legal limit, or a nearby lightning strike? I don't know.
That connector shows OK with an ohmmeter but at 3.5MHz it's definitely
shorted, even with 100W. It's a silver plate Amphenol for those
perfectionists out there <:-)
I haven't hit the wrong antenna, mainly because I'm in the habit of
using the AIM for tune up, tuning the amp into a dummy load before
hitting the antenna with power. That way the amp is tuned properly for
the antenna. I knw it's not necessary for the tribander, but it's a habit.
73
Roger (K8RI)
On 9/5/2016 Monday 9:02 PM, Al Kozakiewicz wrote:
My evidence is strictly empirical, but it appears to me that the effective
working voltage of N connectors is less than UHF.
When doing dumb things - like trying to load a 30m antenna on 17m at full power
- the attendant voltage from the SWR will arc over.
Now, if you avoid dumb because, say, you have resonant antennas (by resonant,
I mean on the band you're trying to load them on) N is quite satisfactory.
At one point I thought I was going to switch everything over to them. I now
have a bin full of crimp and chassis connectors. Since dumb seems to follow me
around, I've since bagged that idea.
Al
AB2ZY
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