{"id":3163,"date":"2025-12-31T08:42:31","date_gmt":"2025-12-31T13:42:31","guid":{"rendered":"https:\/\/leguitovore.com\/?post_type=video&#038;p=3163"},"modified":"2025-12-31T11:02:11","modified_gmt":"2025-12-31T16:02:11","slug":"diy-jfet-distortion-and-treble-booster-kit-understanding-the-basics-of-the-components","status":"publish","type":"video","link":"https:\/\/leguitovore.com\/en\/video\/distortion-jfet-et-treble-booster-en-kit-diy-sabotage-comprendre-les-bases-des-composantes\/","title":{"rendered":"DIY JFET Distortion and Treble Booster Kit: Understanding the Basics of the Components"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Remember the reverb pedal I built recently? Today, we&#039;re taking it to the next level with a new build, but I&#039;m warning you: it&#039;s going to be &quot;massive destruction.&quot; This project is inspired by the legendary sound of <strong>Tony Iommi (Black Sabbath)<\/strong>, with a circuit adapted to mimic the behavior of lamps using some special transistors.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A big thank you to <strong>Pedal Parts and Kits<\/strong> who provided this second kit to allow us to explore the world of DIY. If you want to get started but don&#039;t know where to begin, stay with me: we&#039;ll break it down simply and effectively.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. A Short Electronics Lesson: The &quot;Chess Game&quot; of Components<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For the first kit, we assembled it &quot;blindly&quot;. This time, let&#039;s take the time to understand what these small parts are for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Resistances (R):<\/strong> They limit the current. They are used to reduce the signal amplitude (volume) or to divide the voltage to bias other components. Their value is measured in <strong>Ohms (\u03a9)<\/strong>, often in kilo-ohms (k\u03a9).\n<ul class=\"wp-block-list\">\n<li><em>Trick :<\/em> Learn the color code (the bands from 0 to 9). The 3rd band indicates the number of zeros to add. Always check with a multimeter as there is a margin of tolerance (gold or silver band).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"518\" src=\"https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188832-YJidEh-1024x518.webp\" alt=\"\" class=\"wp-image-3169\" srcset=\"https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188832-YJidEh-1024x518.webp 1024w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188832-YJidEh-300x152.webp 300w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188832-YJidEh-768x388.webp 768w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188832-YJidEh-1536x777.webp 1536w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188832-YJidEh-18x9.webp 18w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188832-YJidEh-600x304.webp 600w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188832-YJidEh.webp 1878w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Capacitors (C):<\/strong> They store and deliver current. They filter out interference and block direct current (0 Hz) while allowing high frequencies to pass through.\n<ul class=\"wp-block-list\">\n<li><em>Usage:<\/em> In series, they act as &quot;High-Pass&quot; filters (cutting low frequencies); connected to ground, they act as &quot;Low-Pass&quot; filters (cutting high frequencies). They are measured in microfarads (\u00b5F), nanofarads (nF), or picofarads (pF).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"525\" src=\"https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188862-O1F31S-1024x525.webp\" alt=\"\" class=\"wp-image-3170\" srcset=\"https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188862-O1F31S-1024x525.webp 1024w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188862-O1F31S-300x154.webp 300w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188862-O1F31S-768x394.webp 768w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188862-O1F31S-1536x788.webp 1536w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188862-O1F31S-18x9.webp 18w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188862-O1F31S-600x308.webp 600w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188862-O1F31S.webp 1787w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"591\" src=\"https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188896-ouggw0-1024x591.webp\" alt=\"\" class=\"wp-image-3173\" srcset=\"https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188896-ouggw0-1024x591.webp 1024w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188896-ouggw0-300x173.webp 300w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188896-ouggw0-768x443.webp 768w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188896-ouggw0-1536x886.webp 1536w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188896-ouggw0-18x10.webp 18w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188896-ouggw0-600x346.webp 600w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188896-ouggw0.webp 1775w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Transistors:<\/strong> They act like a valve or a tap. A small variation at the input controls a large variation at the output (amplification).\n<ul class=\"wp-block-list\">\n<li><strong>Bipolar disorder:<\/strong> They react to the current, but their distortion is often less &quot;nice&quot; for the guitar.<\/li>\n\n\n\n<li><strong>JFET (Field Effect Transistor):<\/strong> They operate using voltage, like the <strong>lamps<\/strong> high-end amplifiers. Their distortion is more harmonious and progressive, although they are more difficult to make commercially stable due to their large tolerance margins.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"600\" src=\"https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188940-BriB2W-1024x600.webp\" alt=\"\" class=\"wp-image-3174\" srcset=\"https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188940-BriB2W-1024x600.webp 1024w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188940-BriB2W-300x176.webp 300w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188940-BriB2W-768x450.webp 768w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188940-BriB2W-1536x900.webp 1536w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188940-BriB2W-18x12.webp 18w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188940-BriB2W-600x352.webp 600w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188940-BriB2W.webp 1695w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Diodes (D):<\/strong> They only allow current to pass in one direction.\n<ul class=\"wp-block-list\">\n<li><em>Usage:<\/em> They are used to rectify the power supply or to &quot;clip&quot; the audio signal to create artificial distortion.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"472\" src=\"https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188986-tbiG0x-1024x472.webp\" alt=\"\" class=\"wp-image-3175\" srcset=\"https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188986-tbiG0x-1024x472.webp 1024w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188986-tbiG0x-300x138.webp 300w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188986-tbiG0x-768x354.webp 768w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188986-tbiG0x-1536x708.webp 1536w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188986-tbiG0x-18x8.webp 18w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188986-tbiG0x-600x276.webp 600w, https:\/\/leguitovore.com\/wp-content\/uploads\/image-1767188986-tbiG0x.webp 1810w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. Analysis of the &quot;Sabotage&quot; circuit\u00ab<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The kit <strong>Sabotage<\/strong> is an adaptation of the circuit <em>Sabra Cadabra<\/em> Catalinbread, itself inspired by a Laney Supergroup amp driven by a Dallas Range Master (Treble Booster). This is Tony Iommi&#039;s typical rig.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Special feature:<\/strong> There are no diodes to create the distortion. It&#039;s the <strong>JFET transistors<\/strong> which, when pushed to their limit, naturally generate a dynamic saturation similar to that of a tube amplifier.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Food Section:<\/strong> Includes a safety diode to prevent damaging the circuit if you connect a power supply backwards.<\/li>\n\n\n\n<li><strong>Treble Boost:<\/strong> The first stage the signal encounters. The &quot;Range&quot; knob is a variable resistor that allows more or less bass to pass through the booster.<\/li>\n\n\n\n<li><strong>Preamp:<\/strong> Four cascaded gain stages (transistors working in complementarity).<\/li>\n\n\n\n<li><strong>Equalization &amp; Output:<\/strong> A 5th gain stage, followed by a volume control and a &quot;Presence&quot; adjustment (high-frequency filter at the output).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. Tips for flawless welds<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Most DIY problems stem from either a careless mistake or a bad solder joint.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Iron:<\/strong> A model of <strong>40W<\/strong> is a good compromise. A fine (conical) tip helps prevent overheating of neighboring components.<\/li>\n\n\n\n<li><strong>Interview :<\/strong> Always clean your tip on a damp sponge or steel wool to remove residue.<\/li>\n\n\n\n<li><strong>Welding:<\/strong> Use an alloy <strong>60\/40 (Tin\/Lead)<\/strong> or unleaded, but absolutely with a <strong>resin core<\/strong> (flux). Absolutely avoid plumbing acid flux paste! A diameter of <strong>0.8 mm<\/strong> is ideal.<\/li>\n\n\n\n<li><strong>The Technique:<\/strong> Heat the component and the PCB pad, then apply the solder to the hot part (not the soldering iron). A good solder joint should &quot;wet&quot; the metal and form a small, shiny &quot;cone&quot; (like a chocolate). <em>Kiss<\/em>).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. The Build: &quot;Destroyed&quot; Look and Assembly<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For this project, I chose a raw aluminum case. For the look: cleaning with alcohol, light sanding, and a slightly distressed, &quot;bloody&quot; finish to match the Black Sabbath sound.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The assembly:<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Basic components:<\/strong> Resistors, then capacitors.<\/li>\n\n\n\n<li><strong>Supports (Sockets):<\/strong> Very important for JFET transistors, in order to be able to test or replace them without desoldering.<\/li>\n\n\n\n<li><strong>Potentiometers:<\/strong> Solder only the middle tab first so that you can adjust them perfectly in the housing before finalizing.<\/li>\n\n\n\n<li><strong>Wiring :<\/strong> Unlike the first kit, there is no ribbon cable. Each connection between the main PCB, the 3PDT switch, and the jacks must be wired independently.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>5. Troubleshooting: When it doesn&#039;t work\u2026<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Even with experience, we make mistakes!<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Error #1:<\/strong> I wired the output jack backwards again (no signal). I had to reverse the wires.<\/li>\n\n\n\n<li><strong>Error #2:<\/strong> I had sound, but it was weak, crackling and without power.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The solution:<\/strong> I went to the forum of <strong>GuitarPCB.com<\/strong> (the designers of the circuits sold by Pedal Parts and Kits). The community helped me measure the values with a multimeter. The problem stemmed from a bad solder joint and poor contact between a transistor and its socket. Once that was fixed\u2026 <strong>BINGO!<\/strong> The heavy, fat sound of Black Sabbath was there.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Conclusion and Perspectives<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Moving from assembler to &quot;builder&quot; means understanding the philosophy of the circuit. My next challenge? Assembling a circuit on a... <strong>breadboard<\/strong> (prototyping board) to test and modify each component before soldering, in order to create my own custom sound.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This was probably the last video of 2025. Thank you for this wonderful year and see you in 2026 for even more ambitious new projects!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What&#039;s stopping you from getting started? Fear of electronics or lack of equipment? Tell me in the comments!<\/strong><\/p>","protected":false},"excerpt":{"rendered":"<p>Vous vous souvenez de la p\u00e9dale de r\u00e9verb\u00e9ration que j&rsquo;ai construite r\u00e9cemment ? Aujourd&rsquo;hui, on passe au niveau sup\u00e9rieur avec un nouveau build, mais je vous avertis : \u00e7a va \u00eatre de la \u00ab\u00a0destruction massive\u00a0\u00bb. Ce projet s&rsquo;inspire du son l\u00e9gendaire de Tony Iommi (Black Sabbath), avec un circuit adapt\u00e9 pour imiter le comportement des [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3164,"comment_status":"open","ping_status":"open","template":"","meta":{"_acf_changed":false},"tags":[],"categorie-de-video":[15,19],"class_list":["post-3163","video","type-video","status-publish","has-post-thumbnail","hentry","categorie-de-video-construction","categorie-de-video-instruments"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Distortion JFET et treble booster en kit DIY Sabotage : comprendre les bases des composantes - Le Guitovore<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/leguitovore.com\/en\/video\/diy-jfet-distortion-and-treble-booster-kit-understanding-the-basics-of-the-components\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Distortion JFET et treble booster en kit DIY Sabotage : comprendre les bases des composantes - Le Guitovore\" \/>\n<meta property=\"og:description\" content=\"Vous vous souvenez de la p\u00e9dale de r\u00e9verb\u00e9ration que j&rsquo;ai construite r\u00e9cemment ? Aujourd&rsquo;hui, on passe au niveau sup\u00e9rieur avec un nouveau build, mais je vous avertis : \u00e7a va \u00eatre de la \u00ab\u00a0destruction massive\u00a0\u00bb. 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Aujourd&rsquo;hui, on passe au niveau sup\u00e9rieur avec un nouveau build, mais je vous avertis : \u00e7a va \u00eatre de la \u00ab\u00a0destruction massive\u00a0\u00bb. Ce projet s&rsquo;inspire du son l\u00e9gendaire de Tony Iommi (Black Sabbath), avec un circuit adapt\u00e9 pour imiter le comportement des [&hellip;]","og_url":"https:\/\/leguitovore.com\/en\/video\/diy-jfet-distortion-and-treble-booster-kit-understanding-the-basics-of-the-components\/","og_site_name":"Le Guitovore","article_modified_time":"2025-12-31T16:02:11+00:00","og_image":[{"width":1280,"height":720,"url":"https:\/\/leguitovore.com\/wp-content\/uploads\/maxresdefault-45.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/leguitovore.com\/video\/distortion-jfet-et-treble-booster-en-kit-diy-sabotage-comprendre-les-bases-des-composantes\/","url":"https:\/\/leguitovore.com\/video\/distortion-jfet-et-treble-booster-en-kit-diy-sabotage-comprendre-les-bases-des-composantes\/","name":"DIY JFET Distortion and Treble Booster Kit: Understanding the Basics of Components - 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