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Question re: HT BNC Antenna Adapter
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andrew@...
The feedline or adapter won't change the antenna length / resonance.
The Diamond 320 seems nice. It's barely longer and very flexible. Can't say I've tried it on 220, but the reviews are good. KI7WYA |
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W7ABD
Hi Ken,
Anything in the feedline between the radio and antenna is going to cause some loss. It's the nature of the RF beast. That being said, the loss from a SMA to BNC adapter should be very slight. What's more important is that SMA connectors are somewhat fragile, so constant connect/disconnects will cause it to fail. So installing a BNC adapter is very much a good idea. Quick quarter-turn off and on and you are protecting your HT's SMA connector. A win-win all the way around. Jim W7ABD |
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Paul Butzi (W7PFB)
I pretty regularly stacked various adaptors on my antenna analyzer until I managed to build out a collection from N connectors (what’s on the analyzer) to everything else. When I finally got a chance I compared SWR through a single adapter to a series of adaptors and couldn’t see any difference. I’ve no way to measure loss, though.
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For what it’s worth 3 band HT antennas are now pretty common. I’ve got a Comet HT-224 or something like that, for my Kenwood 3 band HT (2m/1.25m/70cm) that I like a lot - better performance, I think, than the stock antenna and more flexible.
-p W7PFB
73, Don’t forget to smile and have fun!
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Ken Koch
I have a question regarding my HT antenna. I am somewhat annoyed by my HT antenna connection (SMA) since every time I want to connect or disconnect an antenna I need to screw it in. This is an issue since it is tri-band, and requires an antenna change for 220. I might also want to switch back and forth between the stock antenna and a higher performance/longer one.
I purchased a SMA/BNC adapter for the HT, and one for each antenna. However, it occurred to me that these adapters may slightly change the resonance of the antennas or otherwise affect performance. Practically speaking will this make any performance difference at all? |
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