{"id":2453,"date":"2018-11-13T21:03:39","date_gmt":"2018-11-13T21:03:39","guid":{"rendered":"http:\/\/rerun-electronics.com\/?p=2453"},"modified":"2018-11-13T21:04:31","modified_gmt":"2018-11-13T21:04:31","slug":"the-slap-backer-tube-delay-amplifier","status":"publish","type":"post","link":"http:\/\/rerun-electronics.com\/?p=2453","title":{"rendered":"The Slap Backer Tube Delay Amplifier"},"content":{"rendered":"\n<ul class=\"wp-block-gallery columns-5 is-cropped wp-block-gallery-1\"><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"812\" src=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8376_clean.jpg\" alt=\"\" data-id=\"1762\" data-link=\"http:\/\/rerun-electronics.com\/?attachment_id=1762\" class=\"wp-image-1762\" srcset=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8376_clean.jpg 1200w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8376_clean-300x203.jpg 300w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8376_clean-768x520.jpg 768w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8376_clean-1024x693.jpg 1024w\" sizes=\"auto, (max-width: 706px) 89vw, (max-width: 767px) 82vw, 740px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"798\" src=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8364_clean.jpg\" alt=\"\" data-id=\"1761\" data-link=\"http:\/\/rerun-electronics.com\/?attachment_id=1761\" class=\"wp-image-1761\" srcset=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8364_clean.jpg 1200w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8364_clean-300x200.jpg 300w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8364_clean-768x511.jpg 768w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8364_clean-1024x681.jpg 1024w\" sizes=\"auto, (max-width: 706px) 89vw, (max-width: 767px) 82vw, 740px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8346_clean.jpg\" alt=\"\" data-id=\"1760\" data-link=\"http:\/\/rerun-electronics.com\/?attachment_id=1760\" class=\"wp-image-1760\" srcset=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8346_clean.jpg 1200w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8346_clean-300x200.jpg 300w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8346_clean-768x512.jpg 768w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8346_clean-1024x683.jpg 1024w\" sizes=\"auto, (max-width: 706px) 89vw, (max-width: 767px) 82vw, 740px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"801\" src=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8337_clean.jpg\" alt=\"\" data-id=\"1759\" data-link=\"http:\/\/rerun-electronics.com\/?attachment_id=1759\" class=\"wp-image-1759\" srcset=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8337_clean.jpg 1200w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8337_clean-300x200.jpg 300w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8337_clean-768x513.jpg 768w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8337_clean-1024x684.jpg 1024w\" sizes=\"auto, (max-width: 706px) 89vw, (max-width: 767px) 82vw, 740px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8331-clean.jpg\" alt=\"\" data-id=\"1758\" data-link=\"http:\/\/rerun-electronics.com\/?attachment_id=1758\" class=\"wp-image-1758\" srcset=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8331-clean.jpg 1200w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8331-clean-300x200.jpg 300w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8331-clean-768x512.jpg 768w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8331-clean-1024x683.jpg 1024w\" sizes=\"auto, (max-width: 706px) 89vw, (max-width: 767px) 82vw, 740px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"810\" src=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8325_clean.jpg\" alt=\"\" data-id=\"1757\" data-link=\"http:\/\/rerun-electronics.com\/?attachment_id=1757\" class=\"wp-image-1757 is-layout-flex wp-block-gallery-is-layout-flex\" srcset=\"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8325_clean.jpg 1200w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8325_clean-300x203.jpg 300w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8325_clean-768x518.jpg 768w, http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8325_clean-1024x691.jpg 1024w\" sizes=\"auto, (max-width: 706px) 89vw, (max-width: 767px) 82vw, 740px\" \/><\/figure><\/li><\/ul>\n\n\n\n<p>This lovely little amp comes from the defective chassis of the well-known Dynacord Eminent amplifiers of the early 1960`s.&nbsp; Luckily, the excellent original transformers were still present and working.&nbsp; They provide the base for the push pull EL34 cathode biased output circuit for around 30 Watts power.<\/p>\n\n\n\n<p>The unused 5 Volt tap of the power transformer provided an opportunity to do something different with this amp.&nbsp; I had always wanted to build a slapback delay into an amp, similar to the sound of Chet Atkins or Scotty Moore as a pedal just doesn&#8217;t sound the same.&nbsp; Using the cheap and effective PT2399 delay chip was the perfect ticket as it stays clean enough for a perfect slap sound.&nbsp;&nbsp;<\/p>\n\n\n\n<p>Otherwise, the sound of the amp also harks back to the golden age with a big open tone that overdrives really well especially when the mids control is pushed.&nbsp;&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This lovely little amp comes from the defective chassis of the well-known Dynacord Eminent amplifiers of the early 1960`s.&nbsp; Luckily, the excellent original transformers were still present and working.&nbsp; They provide the base for the push pull EL34 cathode biased output circuit for around 30 Watts power. The unused 5 Volt tap of the power &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/rerun-electronics.com\/?p=2453\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;The Slap Backer Tube Delay Amplifier&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":1757,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","jetpack_post_was_ever_published":false,"_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":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[5],"tags":[],"class_list":["post-2453","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\/2018\/11\/MG_8325_clean-300x203.jpg","jetpack_publicize_connections":[],"jetpack_featured_media_url":"http:\/\/rerun-electronics.com\/wp-content\/uploads\/2018\/11\/MG_8325_clean.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 7 years ago","modified":"Updated 7 years ago"},"absolute_dates":{"created":"Posted on 2018-11-13","modified":"Updated on 2018-11-13"},"absolute_dates_time":{"created":"Posted on 2018-11-13 21:03","modified":"Updated on 2018-11-13 21:04"},"featured_img_caption":"","series_order":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/papHjQ-Dz","_links":{"self":[{"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=\/wp\/v2\/posts\/2453","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=2453"}],"version-history":[{"count":2,"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=\/wp\/v2\/posts\/2453\/revisions"}],"predecessor-version":[{"id":2456,"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=\/wp\/v2\/posts\/2453\/revisions\/2456"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=\/wp\/v2\/media\/1757"}],"wp:attachment":[{"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2453"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2453"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/rerun-electronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2453"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}