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There seems to be better information on the history of the beam tetrode here http://en.wikipedia.org/wiki/6L6 Particularly the work of Harries in discovering "critical distance". I've put a copy of some relevant pages from Wireless World here if it's of use - http://sites.google.com/a/wepoco.com/self-aware/retro-geekery/valve-amplifiers/harries-august-1935 Regards, Michael Saunby. ( talk) 09:41, 29 July 2008
Radiotron Designer's Handbook, F. Langford-Smith ed., 4th edition, Wireless Press, Sydney 1954. Section 13.3 (x), page 569: "... includes types such as 6L6, 807 and KT66, which differ from pentodes principally in having sharper "knees" to their plate characteristics, more second harmonic but less third harmonic distortion." 2corner ( talk) 11:26, 15 May 2014 (UTC)
The article currently says "A beam tetrode (also referred to as a "Beam Power Tube") is a type of vacuum tube specially designed to produce greater output power than a similar pentode." However, I was taught that the beam tetrode was invented as a way of producing a valve in the US with the benefits of a pentode over a tetrode but without infringing on the British patents on the supressor grid and thereby avoiding paying expensive licensing. The beam plates are not a traditional grid and therefore avoid the patents. This would imply that it was not specifically designed to improve on the pentode but merely to emulate one at lower expense than paying a license. I have not made an edit because I don't have a reference. Hopefully someone knows of a reference to sort this out, although the whole article needs referencing anyway. KX36 ( talk) 14:37, 21 January 2012 (UTC)
This is a perfectly good article. Clear, concise and factually correct. I do not believe that additional citations should be required to maintain this article. The information is keenly accurate and the writing is clear, vibrant, friendly and most of all; effective English communication.
Additional citations would probably not do significant harm to this article; however, I think the writer’s time could be better spent expanding the article to include more information on this fascinating subject. —E.g., how were the manufacturing problems of the kink-less tetrode remedied? Simple things like a patent discrepancy have often been the historical catalyst to great scientific advances. This article has only scratched the surface of the scientific and manufacturing struggles to develop the modern KT tetrode, the 6L6 beam tetrode and the EL34-type pentode.
All of these devices played a vital role in the development of sound reproduction and radio in the 20th century. To this day, we continue to use all of these valves for audio and RF applications. The positive attributes of these specific valves has caused a revival of valve technology. Most engineers now realise that the principle of valves remains a useful science in our engineering tool box. There are hundreds of thousands of people making kits or designing their own modern valve gear because of the great worth of this science. This article is perhaps the only web source for this material I have seen. For the person searching for this information on the web, Wikipedia is the only entry that begins to present the subject with any level of completeness or objectivity and correct science. Removing this article from Wikipedia would be a great loss.
I most fear this article being withdrawn because it would be a great loss of useful and correct information. I.e., the bottom line of a Wiki article, or so I thought. Plus, Wikipedia would lose a vital, sound, useful and well written article. This is not a marginal article. It is amply sourced and well seeded with citation. Many of the citations are inane and unnecessary, but this is what the Wikipedia controlling personnel clique seem to want. The Wiki board’s officious obsession with over-citation and source reference is not useful, traditional or productive. It seems to be the product of an insular Wiki board or directors.
I am not sure if the favour for over citation and sourcing is the result of over-blown egos, “control freaks”, or what, but if not halted, this condition will surely cause Wikipedia’s eventual downfall. Do people understand that ALL Wiki articles are works in progress and are NEVER considered complete? This is the greatest advance over the traditional encyclopaedia that Wikipedia has top offer. I plead with the Wiki powers NOT to withdraw this article.
PS: I suggest all Wiki readers and contributors read volumes of the Encyclopaedia Britannica for better instruction on how encyclopaedia entries should be written. If Wiki is looking for an effective writing style guide they need go no further than "The Elements of Style" by Strunk and White and classic Encyclopaedia Britannica. Wikipedia has a bad habit of making their article requirements senselessly ridged and bureaucratic.
I am an Electronic Engineer and Historian. I have a long lived interest and passion for the overwhelming technology advances achieved by the RCA Victor Company during the 1920s-1950s. Particularly in Radio and Audio, no single company made more advances, inventions and significant contributions to Man’s base of knowledge on this subject than any other commercial enterprise on Earth. — Preceding unsigned comment added by Bixlives! ( talk • contribs) 07:31, 17 October 2012 (UTC)
2corner ( talk) 10:48, 8 January 2015 (UTC)
I trust that you will not object to the addition of this link. It seems that your page, & the material on Beam Tetrode in 'Tetrode' are complementary, and both might be interesting to a reader of these pages. G4oep ( talk) 11:20, 8 January 2015 (UTC)
This article is rated C-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||
|
There seems to be better information on the history of the beam tetrode here http://en.wikipedia.org/wiki/6L6 Particularly the work of Harries in discovering "critical distance". I've put a copy of some relevant pages from Wireless World here if it's of use - http://sites.google.com/a/wepoco.com/self-aware/retro-geekery/valve-amplifiers/harries-august-1935 Regards, Michael Saunby. ( talk) 09:41, 29 July 2008
Radiotron Designer's Handbook, F. Langford-Smith ed., 4th edition, Wireless Press, Sydney 1954. Section 13.3 (x), page 569: "... includes types such as 6L6, 807 and KT66, which differ from pentodes principally in having sharper "knees" to their plate characteristics, more second harmonic but less third harmonic distortion." 2corner ( talk) 11:26, 15 May 2014 (UTC)
The article currently says "A beam tetrode (also referred to as a "Beam Power Tube") is a type of vacuum tube specially designed to produce greater output power than a similar pentode." However, I was taught that the beam tetrode was invented as a way of producing a valve in the US with the benefits of a pentode over a tetrode but without infringing on the British patents on the supressor grid and thereby avoiding paying expensive licensing. The beam plates are not a traditional grid and therefore avoid the patents. This would imply that it was not specifically designed to improve on the pentode but merely to emulate one at lower expense than paying a license. I have not made an edit because I don't have a reference. Hopefully someone knows of a reference to sort this out, although the whole article needs referencing anyway. KX36 ( talk) 14:37, 21 January 2012 (UTC)
This is a perfectly good article. Clear, concise and factually correct. I do not believe that additional citations should be required to maintain this article. The information is keenly accurate and the writing is clear, vibrant, friendly and most of all; effective English communication.
Additional citations would probably not do significant harm to this article; however, I think the writer’s time could be better spent expanding the article to include more information on this fascinating subject. —E.g., how were the manufacturing problems of the kink-less tetrode remedied? Simple things like a patent discrepancy have often been the historical catalyst to great scientific advances. This article has only scratched the surface of the scientific and manufacturing struggles to develop the modern KT tetrode, the 6L6 beam tetrode and the EL34-type pentode.
All of these devices played a vital role in the development of sound reproduction and radio in the 20th century. To this day, we continue to use all of these valves for audio and RF applications. The positive attributes of these specific valves has caused a revival of valve technology. Most engineers now realise that the principle of valves remains a useful science in our engineering tool box. There are hundreds of thousands of people making kits or designing their own modern valve gear because of the great worth of this science. This article is perhaps the only web source for this material I have seen. For the person searching for this information on the web, Wikipedia is the only entry that begins to present the subject with any level of completeness or objectivity and correct science. Removing this article from Wikipedia would be a great loss.
I most fear this article being withdrawn because it would be a great loss of useful and correct information. I.e., the bottom line of a Wiki article, or so I thought. Plus, Wikipedia would lose a vital, sound, useful and well written article. This is not a marginal article. It is amply sourced and well seeded with citation. Many of the citations are inane and unnecessary, but this is what the Wikipedia controlling personnel clique seem to want. The Wiki board’s officious obsession with over-citation and source reference is not useful, traditional or productive. It seems to be the product of an insular Wiki board or directors.
I am not sure if the favour for over citation and sourcing is the result of over-blown egos, “control freaks”, or what, but if not halted, this condition will surely cause Wikipedia’s eventual downfall. Do people understand that ALL Wiki articles are works in progress and are NEVER considered complete? This is the greatest advance over the traditional encyclopaedia that Wikipedia has top offer. I plead with the Wiki powers NOT to withdraw this article.
PS: I suggest all Wiki readers and contributors read volumes of the Encyclopaedia Britannica for better instruction on how encyclopaedia entries should be written. If Wiki is looking for an effective writing style guide they need go no further than "The Elements of Style" by Strunk and White and classic Encyclopaedia Britannica. Wikipedia has a bad habit of making their article requirements senselessly ridged and bureaucratic.
I am an Electronic Engineer and Historian. I have a long lived interest and passion for the overwhelming technology advances achieved by the RCA Victor Company during the 1920s-1950s. Particularly in Radio and Audio, no single company made more advances, inventions and significant contributions to Man’s base of knowledge on this subject than any other commercial enterprise on Earth. — Preceding unsigned comment added by Bixlives! ( talk • contribs) 07:31, 17 October 2012 (UTC)
2corner ( talk) 10:48, 8 January 2015 (UTC)
I trust that you will not object to the addition of this link. It seems that your page, & the material on Beam Tetrode in 'Tetrode' are complementary, and both might be interesting to a reader of these pages. G4oep ( talk) 11:20, 8 January 2015 (UTC)