1.0diyparadisehttps://diyparadise.com/wrich600338<blockquote class="wp-embedded-content" data-secret="0AjKVKBGkG"><a href="https://diyparadise.com/w/ultra-compact-club/">Ultra Compact Club</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://diyparadise.com/w/ultra-compact-club/embed/#?secret=0AjKVKBGkG" width="600" height="338" title="“Ultra Compact Club” — diyparadise" data-secret="0AjKVKBGkG" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !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); /* ]]> */ </script> https://diyparadise.com/w/wp-content/uploads/2008/06/wailysimpleel84.jpg512384The Ultra Compact Club     Welcome to the Ultra Compact Club where our perception of Push Pull amps were ruined by this article. However, instead of building this little amp ala Melvin Leibowitz, we proceeded further by tweaking the circuitry to loftier heights via the usage of constant current source, hence it’s no longer the Compact amp but — Ultra Compact.   I admit, I’m guilty of "corrupting" the fine folks here with my Simple EL84 articles but I assure you I’m not the only Evil one here. Ferry Prasetyo, Jakarta, Indonesia uses this little amp to drive his