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That may account for the reason I calculated the new vector 4000's physical length to .81λ instead of .82λ

It will be interesting to see how you get on.

By the way its only in recent years Sirio have been quoting real world gain figures,less than 10 years ago they wee quoting around 7.0 dBd for the vector 4000 and around 5dBd for a high power 4000 mobile antenna with 3 kw power handling,(no doubt a few molten coils later reality began to bite or they stopped getting Solarcon to print their catalogues) among many other ridiculous claims.The Sirio 827 was quoted at 7.5dBd back then,I've taken these figures straight off the Sirio Catalogue (copyright dated 1995,although I believe the actual catalogue was used later than that,its the only date in it).Ironically at the same time they were quoting both the Starduster 27 and SD27 dipole at 0dBd.

<blockquote data-quote="jazzsinger" data-source="post: 156288" data-attributes="member: 7426">That may account for the reason I calculated the new vector 4000&#039;s physical length to .81λ instead of .82λIt will be interesting to see how you get on.By the way its only in recent years Sirio have been quoting real world gain figures,less than 10 years ago they wee quoting around 7.0 dBd for the vector 4000 and around 5dBd for a high power 4000 mobile antenna with 3 kw power handling,(no doubt a few molten coils later reality began to bite or they stopped getting Solarcon to print their catalogues) among many other ridiculous claims.The Sirio 827 was quoted at 7.5dBd back then,I&#039;ve taken these figures straight off the Sirio Catalogue (copyright dated 1995,although I believe the actual catalogue was used later than that,its the only date in it).Ironically at the same time they were quoting both the Starduster 27 and SD27 dipole at 0dBd.</blockquote>

[QUOTE="jazzsinger, post: 156288, member: 7426"] That may account for the reason I calculated the new vector 4000's physical length to .81λ instead of .82λ It will be interesting to see how you get on. By the way its only in recent years Sirio have been quoting real world gain figures,less than 10 years ago they wee quoting around 7.0 dBd for the vector 4000 and around 5dBd for a high power 4000 mobile antenna with 3 kw power handling,(no doubt a few molten coils later reality began to bite or they stopped getting Solarcon to print their catalogues) among many other ridiculous claims.The Sirio 827 was quoted at 7.5dBd back then,I've taken these figures straight off the Sirio Catalogue (copyright dated 1995,although I believe the actual catalogue was used later than that,its the only date in it).Ironically at the same time they were quoting both the Starduster 27 and SD27 dipole at 0dBd. [/QUOTE]

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