Revisions Listing for k2av.com
V.2023.09.20
[All Articles] To support our international readers, historically 55% of our readership, we have added a no-frame mode with a link-based index with brief descriptions. This supports auto-translators embedded in several popular browsers which no longer translate frame content. From k2av.com, you can access no-frame mode with the top left button on the home page. The left margin green button index is omitted in the no-frame mode. No-frame mode can be accessed directly with k2av.com/NoFrameIndex.html, case-sensitive. The no-frame index has a link which opens the home page in no-frame mode. The no-frame index also includes brief article descriptions.
[Design Inverted L] [Place Inverted L] These two articles were combined to reduce much duplicated material, place dependent materials next to each other and improve reading flow. Old names are preserved in the new html, linking directly to the new article content to keep from breaking old direct external links saved by readers.
[Design/Place an Inverted L] The new article addresses a decade's worth of various issues and information proven to be important designing and implementing an L at various installer's sites. The article has been broken into sections and subsections.
The new article begins with a descriptive index to its sections and subsections. This addresses a common complaint: Needing to read the entire long article from beginning to end to find something previously read. Each index item contains a short description and a direct link to each section and subsection of the article. Article content can also be read sequentially without using the index, beginning just below the index.
Previous large topics on the L were broken up into multiple subsections. Subsections are restricted to a limited number of short to medium paragraphs. We hope the article's index will give a reader easy later return to a point of interest.
The index in [Design/Place an Inverted L] can be read as text to get a quick understanding of the range of issues that can affect installing an excellent L/FCP.
[Design/Place an Inverted L] content for hillside placements of L/FCP is deferred, needing illustrations, and research to deal with conflicting modeling results and the inability to enter this terrain directly into EZNEC. This does not refer to "gradual slopes". The listings are retained with a note.
[Illustrated articles] For the benefit of those using translators, text embedded as graphics in .PNG and .GIF illustrations is repeated separately in HTML text so that auto-translators are aware of it. Look for translated illustration text in a box immediately after illustrations. These graphics text HTML repeats will be added gradually as time permits, without notice or version renumbering.
[Many articles] Readability Improvements and Clarifications after a one year, four month hiatus. Due to various family medical issues this work was necessarily set aside, leaving much to be done later. Many thanks for readers' patience on delayed answers to correspondence.
V.2022.04.10
[Frame Index Column] Compacted index text to reduce column size and prepare for a no-frame entry index to improve or enable browser-based translation.
[160+80+40 Aerial/FCP] Updated EZNEC references supporting Traceview of Trident L patterns to reflect final V7 free versions.
[Various] Readability Improvements and Clarifications.
V.2022.03.20
[Other Antennas and Subjects] Added a download for Spectrogram Freeware Version 16.0 to "Sharpening K3/K3s Filter Skirts". Download also available direct from k2av.com/dls/gram16free_setup.exe .
[Snips Format] Added "Snips" format with a short, direct URL access to Snips for short items for posting to email, listserves and groups. There will be a separate complete index and listing, accessible from [Other Antennas and Subjects]. Snips may be added anytime, without running up site revision number, but Snips ID's (dates) since prior version will be listed in [Revisions].
[Snips added Since Last Version] 20220323
[Various] Readability Improvements and Clarifications.
V.2022.02.15
[Field Adjustable IsoT] Corrected minor table errors. Added a second 3 inch field-adjustable IsoT for 27,31,35Ω. Changed IsoT tables formatting for clarity, and ease of comparison. Clarity and substance revisions in 3 inch section of 4 inch vs. 3 inch comparison. Propagated additional winding and value changes to printable sheets, winding diagrams, main IsoT article, etc.
[Various] Readability Improvements and Clarifications. Removed some stale references to "experimental".
V.2022.01.15
[Home Page] In "Very Useful Details" added item (n) referencing and linking to added content in "Taming the Inverted L": Using a special jumper to eliminate false readings sometimes experienced measuring at the Isolation Transformer. Sneaky problem not limited to inverted L's, FCP's, or IsoT's.
[Various] For situations needing common mode chokes, direct users to K9YC's most recent designs. Added references and links to K9YC's 2018 reference PDF: "A New Choke Cookbook for the 160–10M Bands, Using Fair-Rite #31 2.4-in o.d. (2631803802) and 4-in o.d. (2631814002) Toroids".
[Field Adjustable IsoT] New article details winding a robust field-adjustable step-up isolation transformer to deal with isolating and matching an L/FCP feed R's 23-39Ω or 27-46Ω to 50Ω in a single device wound on a 4 inch core. A limited version on a 3 inch core is included. Particularly intended to support "taming" the L/FCP when using Method B in "Taming the Exasperating Inverted L".
[Various] Many textual improvements and small additions in older articles needing references to and from the Field Adjustable material.
[Various] Readability Improvements and Clarifications.
V.2021.04.15
[Trident L] Change Experimental status to Beta. Add year-long 40m performance comparison of Trident L with Inverted Vee.
V.2021.02.15
[Place an FCP] Miscellaneous Clarifications.
[You, as loud as K2AV] Add Jan 2021 CQ160CW Score.
[Various] Many Readability Improvements and Clarifications.
V.2020.11.15
[Place an FCP] Clarify orientation of FCP vs. L horizontal wire.
[65+ Tower L bend] Remove experimental designation.
[Various] Readability Improvements and Clarifications.
V.2020.03.12
[You, Loud as K2AV?] Corrections to 2015 CQ160CW: LP and #1 NA SOALP.
[Various] Readability Improvements and Clarifications.
V.2020.02.15
[Should You Be as Loud as K2AV?] Include 1998 pre-FCP score in listing.
[Various] Readability Improvements and Clarifications.
V.2020.02.03
[Should You Be as Loud as K2AV?] Include 2019/2020 scores in listing. Still no RX antenna, last lost list item completed.
[Index Buttons] Revised order of items, preparing for separate index page for aerial wires not an inverted L, and for research data presentations, FAQ, Blog, helpful correspondence.
[Taming the Inverted L] Expand the list of VNA's in use for tuning purposes.
[Various] Readability Improvements and Clarifications.
V.2020.01.11
[160+80 on One L/FCP] Remove Beta designation. Expand and document fixed HEC capacitor specification in recommendations.
[Trident L: 160/80/40 Aerial/FCP] Add Experimental Section. Three bands on a single L over FCP. Builds upon 160+80.
[A Brief Technical Report] Add third aspect involved in reducing ground losses.
[Various] Readability Improvements and Clarifications.
V.2019.11.01
[Index Bar] Add revisions listing accessed by clicking on revision version green index button.
[Why IsoT that Way] Add short index of reasons why Isolation Transformer is done in the particular way as opposed to others.
[Various] Readability Improvements.
Note: We will continue this listing for 2019.11.01 and beyond, but are unable to produce backdating for earlier changes. Language revisions for readabilty improvement and clarification may be uploaded at any time without a version increment. This is sometimes done to respond real-time to correspondence and make it immediately available to other readers not in communication.
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