Talk:Shortwave broadband antenna: Difference between revisions

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ITU Bands

This article claims that HF is generally considered to be 2MHz to 30MHz. The ITU HF designation refers to the range 3MHz to 30MHz. Is the 2-3 MHz band portion referred to in the article a mistake or is it popular with amateurs (or similar) and generally considered part of HF for convenience? --Spuzzdawg (talk) 23:05, 16 October 2015 (UTC)[reply]

Please read Shortwave_radio#Frequency_classifications. --Glenn (talk) 19:10, 13 April 2017 (UTC)[reply]

Commercial advertisement for Robinson-Barnes antenna

I commented out about half of the text in the subsection on the Robinson-Barnes antenna, put some of the rest into a citation, and demoted the subsection to yet another bullet item. The text seems to be mere marketing for the Bushcomm company that sells the Robinson-Barnes antenna. The commented-out part also appears to be deceptive: It claims that the Robinson-Barnes antenna is more efficient than a dipole, but doesn't specify the frequency at which the comparison is made. (At the dipole's resonant frequencies, it will certainly be much more efficient than the resistively-terminated Robinson-Barnes antenna, which is in fact a folded antenna: Its electrical length, not counting the termination, is longer than its end-to-end length.)

@@ Line 3: / Line 3: @@
 This article claims that HF is generally considered to be 2MHz to 30MHz. The ITU HF designation refers to the range 3MHz to 30MHz. Is the 2-3 MHz band portion referred to in the article a mistake or is it popular with amateurs (or similar) and generally considered part of HF for convenience? --[[User:Spuzzdawg|Spuzzdawg]] ([[User talk:Spuzzdawg|talk]]) 23:05, 16 October 2015 (UTC)
 :Please read [[Shortwave_radio#Frequency_classifications]]. --[[User:Glenn|Glenn]] ([[User talk:Glenn|talk]]) 19:10, 13 April 2017 (UTC)
+== Commercial advertisement for Robinson-Barnes antenna  ==
+I commented out about half of the text in the subsection on the Robinson-Barnes antenna, put some of the rest into a citation, and demoted the subsection to yet another bullet item. The text seems to be mere marketing for the Bushcomm company that sells the Robinson-Barnes antenna. The commented-out part also appears to be deceptive: It claims that the Robinson-Barnes antenna is more efficient than a dipole, but doesn't specify the frequency at which the comparison is made. (At the dipole's resonant frequencies, it will certainly be much more efficient than the resistively-terminated Robinson-Barnes antenna, which is in fact a folded antenna: Its electrical length, not counting the termination, is longer than its end-to-end length.)