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Any body got a cobweb antenna  Icon_minitimeToday at 11:12 pm by John123

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 Any body got a cobweb antenna

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26ct954
Major contributor
Major contributor



Call Sign : 26-CT-954, M7PLD..
Posts : 242
Times Thanked : 2
Join date : 2020-11-27
QTH or Location : Ellesmere Port
Equipment Used : icom 718,cobweb,anytone 667,
Age : 70

Any body got a cobweb antenna  Empty
PostSubject: Any body got a cobweb antenna    Any body got a cobweb antenna  Icon_minitimeMon Mar 15, 2021 5:08 pm

Hi all want to know  how good  these cobweb antenna are compared to a Lw20 long  wire...
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Victor
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Victor


Call Sign : 26-CT-3228 / M7VIC
Posts : 5803
Times Thanked : 352
Join date : 2019-11-10
QTH or Location : Bedford
Equipment Used : Various

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PostSubject: Re: Any body got a cobweb antenna    Any body got a cobweb antenna  Icon_minitimeMon Mar 15, 2021 5:27 pm

Hi Chris,

Your memory must be as bad as mine mate, you only posted the other week about this. Wink

https://charlietangodxgroup.forumotion.com/t2779-cobweb-query?highlight=Cobweb
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https://www.qrz.com/db/M7VIC
26ct954
Major contributor
Major contributor



Call Sign : 26-CT-954, M7PLD..
Posts : 242
Times Thanked : 2
Join date : 2020-11-27
QTH or Location : Ellesmere Port
Equipment Used : icom 718,cobweb,anytone 667,
Age : 70

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PostSubject: Re: Any body got a cobweb antenna    Any body got a cobweb antenna  Icon_minitimeMon Mar 15, 2021 5:41 pm

I know need to find out what the Rx is like compared to my wire,,,, hi Victor.... The wire is working good on 20m into Europe, had one across the pond north of Newyork..
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Northern Crusader
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Major contributor



Call Sign : M0GVZ / 26CT1760
Posts : 531
Times Thanked : 35
Join date : 2019-11-13
QTH or Location : IO94SA
Equipment Used : Icom 7300, TS480, President McKinley, Albrecht AE6110, CRT Mike
Age : 53

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PostSubject: Re: Any body got a cobweb antenna    Any body got a cobweb antenna  Icon_minitimeFri Mar 19, 2021 7:34 pm

Depends on the length of your wire and the direction of it and the signals you want to hear. Once you get above half wavelength long that wire antenna will have lobes with gain and nulls with losses, the number of those lobes/nulls increasing in number and getting narrower as the antenna gets longer and longer. Over a wavelength long and some of those lobes can have several dB gain and nulls of -30dB.

So you'll find comparing it to the Cobwebb that depending on the gain of the lobes and their direction the long wire may hear a particular station or part of the world better than the Cobwebb but in directions where there's nulls in the longwire's azimuth pattern the Cobwebb could slaughter it in those directions - possibly hearing signals at a S5 or higher level which are completely invisible on the wire.
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PostSubject: Re: Any body got a cobweb antenna    Any body got a cobweb antenna  Icon_minitime

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