{"version":"1.0","provider_name":"Johnson&#039;s Techworld","provider_url":"https:\/\/johnsonfrancis.org\/techworld","author_name":"Johnson Francis","author_url":"https:\/\/johnsonfrancis.org\/techworld\/author\/jf\/","title":"When to Use a Ladder Line? - Johnson&#039;s Techworld","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"akIdn4BrVZ\"><a href=\"https:\/\/johnsonfrancis.org\/techworld\/when-to-use-a-ladder-line\/\">When to Use a Ladder Line?<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/johnsonfrancis.org\/techworld\/when-to-use-a-ladder-line\/embed\/#?secret=akIdn4BrVZ\" width=\"600\" height=\"338\" title=\"&#8220;When to Use a Ladder Line?&#8221; &#8212; Johnson&#039;s Techworld\" data-secret=\"akIdn4BrVZ\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/johnsonfrancis.org\/techworld\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","thumbnail_url":"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2024\/05\/When-to-Use-a-Ladder-Line.jpg","thumbnail_width":1204,"thumbnail_height":675,"description":"Yesterday, I saw a nice discussion by Steve WA5FRF in the Ham Radio Science Citizen Investigation (HamSCI) Google Group. I am summarizing it here for the benefit of those who are not members of the Google Group. As you can see in the picture, open parallel wire transmission line is often called a ladder line. [&hellip;]"}