{"id":36,"date":"2015-12-15T18:04:00","date_gmt":"2015-12-15T18:04:00","guid":{"rendered":"https:\/\/rerunelectronicscom.wordpress.com\/2015\/12\/15\/the-morse-code-el34-bass-amplifier"},"modified":"2018-11-02T17:51:59","modified_gmt":"2018-11-02T17:51:59","slug":"the-morse-code-el34-bass-amplifier","status":"publish","type":"post","link":"http:\/\/rerun-electronics.com\/?p=36","title":{"rendered":"The Morse Code EL34 Bass Amplifier"},"content":{"rendered":"\n<ul class=\"wp-block-gallery columns-2 is-cropped wp-block-gallery-1\"><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"419\" src=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2015\/12\/front.jpg\" alt=\"\" data-id=\"1906\" data-link=\"http:\/\/rerun-electronics.com\/?attachment_id=1906\" class=\"wp-image-1906\" srcset=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2015\/12\/front.jpg 640w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2015\/12\/front-300x196.jpg 300w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"427\" src=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2015\/12\/side.jpg\" alt=\"\" data-id=\"1905\" data-link=\"http:\/\/rerun-electronics.com\/?attachment_id=1905\" class=\"wp-image-1905 is-layout-flex wp-block-gallery-is-layout-flex\" srcset=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2015\/12\/side.jpg 640w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2015\/12\/side-300x200.jpg 300w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/figure><\/li><\/ul>\n\n\n<div class=\"separator\" style=\"clear: both; text-align: left;\"><i>Built for J\u00f6rn Magens<\/i><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\"><i>&nbsp;<\/i><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\">This is one of those times when the case really makes the project. &nbsp;No changes were made to the case because it didn&#8217;t need anything else&#8211; the knobs, the VU meter, even the &#8220;porthole&#8221; were already there. &nbsp;Originally, the unit was part of a morse code testing unit. &nbsp;It is a big and heavy case but that is how a proper bass amp should be!<\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\">&nbsp;<\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\">The amplifier has 100 Watts output into 2,4 or 8 Ohm. &nbsp;As J\u00f6rn was looking for an amp that would distort more easily than the usual bass amp, EL34s were chosen as they need less drive. &nbsp;Also included on the front panel is a knob to control the amount of distortion: similar to a power soak but without the wasted heat, this changes the phase inverter&#8217;s bias. &nbsp;Otherwise there are the normal controls of Volume, Tone and Mids. &nbsp;As well, the switch next to the input lets the user choose between three different sounds&#8211; lo gain, normal gain and a parallel mode which adds a little gain while boosting the low mids somewhat.<\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\">&nbsp;<\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\">Finally, a quick mention of the big black capacitors. &nbsp;They are polypropylene and have an incredible lifespan, essentially making their replacement unnecessary. &nbsp;Under normal conditions they should last well over 100,00 hours of use! &nbsp;As a bonus, they make fantastic filter caps such that this is easily the quietest 100 Watt bass amp I have heard.<\/div>","protected":false},"excerpt":{"rendered":"<p>Built for J\u00f6rn Magens &nbsp; This is one of those times when the case really makes the project. &nbsp;No changes were made to the case because it didn&#8217;t need anything else&#8211; the knobs, the VU meter, even the &#8220;porthole&#8221; were already there. &nbsp;Originally, the unit was part of a morse code testing unit. &nbsp;It is &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/rerun-electronics.com\/?p=36\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;The Morse Code EL34 Bass Amplifier&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":1906,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"image","meta":{"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[5],"tags":[],"class_list":["post-36","post","type-post","status-publish","format-image","has-post-thumbnail","hentry","category-instrument-amplifiers","post_format-post-format-image"],"author_meta":{"display_name":"rerun","author_link":"http:\/\/rerun-electronics.com\/author\/rerun"},"featured_img":"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2015\/12\/front-300x196.jpg","jetpack_publicize_connections":[],"jetpack_featured_media_url":"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2015\/12\/front.jpg","coauthors":[],"tax_additional":{"categories":{"linked":["<a href=\"http:\/\/rerun-electronics.com\/?cat=5\" class=\"advgb-post-tax-term\">Instrument Amplifiers<\/a>"],"unlinked":["<span class=\"advgb-post-tax-term\">Instrument Amplifiers<\/span>"]}},"comment_count":"0","relative_dates":{"created":"Posted 10 years ago","modified":"Updated 8 years ago"},"absolute_dates":{"created":"Posted on 2015-12-15","modified":"Updated on 2018-11-02"},"absolute_dates_time":{"created":"Posted on 2015-12-15 18:04","modified":"Updated on 2018-11-02 17:51"},"featured_img_caption":"","series_order":"","jetpack_sharing_enabled":false,"jetpack_shortlink":"https:\/\/wp.me\/papHjQ-A","_links":{"self":[{"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=\/wp\/v2\/posts\/36","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=36"}],"version-history":[{"count":3,"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=\/wp\/v2\/posts\/36\/revisions"}],"predecessor-version":[{"id":1918,"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=\/wp\/v2\/posts\/36\/revisions\/1918"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=\/wp\/v2\/media\/1906"}],"wp:attachment":[{"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=36"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=36"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=36"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}