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An excerpt:All in all the worst version of the lot is the Sirio vector 4000 and only really down to the built quality , the weak parts are the base section and the 3rd section from the top , the Gama match is also pretty bad on the 4000 as the insulator is just plastic , better to make a new one and use teflon (plumbers PTFE tape) to insulate the 2 sections , my last modified 4000 had a slightly lengthened and widened bottom cage as per sigma 4 , and the radiator when properly metered in was 29 3/4 ft , 50 ohm and 1.3 to1 on .555 ,antenna base @35 ft , In my personal experience THE No1 11/10m antenna both local and DX .

[QUOTE="Lil'Yeshua, post: 414897, member: 28438"] An excerpt:All in all the worst version of the lot is the Sirio vector 4000 and only really down to the built quality , the weak parts are the base section and the 3rd section from the top , the Gama match is also pretty bad on the 4000 as the insulator is just plastic , better to make a new one and use teflon (plumbers PTFE tape) to insulate the 2 sections , my last modified 4000 had a slightly lengthened and widened bottom cage as per sigma 4 , and the radiator when properly metered in was 29 3/4 ft , 50 ohm and 1.3 to1 on .555 ,antenna base @35 ft , In my personal experience THE No1 11/10m antenna both local and DX . [/QUOTE]

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