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 'Wet' VF of insulated versus bare anenna wire? 
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Post 'Wet' VF of insulated versus bare anenna wire?
Am I correct in my belief that the velocity factor of insulated wire varies more than bare wire when wet?

I have a g3tpw style Cobwebb - works well but swr varies somewhat when wet. I've been idly thinking about the possibility of SO2R contesting with it using a triplexer and bandpass filters but am certain the swr variations will prevent it working successfully. I've seen references to a Hexbeam being used in this way but I suspect bare wire is used here.

With a Cobwebb there's also the cords holding the ends in place being another source of swr changes in the wet.. So perhaps I'd still have problems if I tried a g3txq single element version with bare wire?

Stew, GW0ETF


Sat Nov 14, 2015 12:07 pm
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 'Wet' VF of insulated versus bare anenna wire? 

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Post Re: 'Wet' VF of insulated versus bare anenna wire?
The VF does change when its wet however it shouldn't be a problem when using bandpass filters. Bandpass filters don't care about the SWR of an antenna, they're a self contained passband filter. Neither is their filtering brick wall.


Sat Nov 14, 2015 10:51 pm
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