{"id":788,"date":"2017-10-27T09:03:55","date_gmt":"2017-10-27T09:03:55","guid":{"rendered":"http:\/\/delaydude.de\/?page_id=788"},"modified":"2018-06-04T07:04:24","modified_gmt":"2018-06-04T07:04:24","slug":"roehren-amp-part-2","status":"publish","type":"post","link":"https:\/\/delaydude.de\/en\/roehren-amp-part-2\/","title":{"rendered":"How a tube amp works – Part 2"},"content":{"rendered":"

\"R\u00f6hre\"<\/a>In the first part<\/a> we have learned that the flow of electrons can be controlled by striking the strings.<\/p>\n

This flow of electrons inside of the tube can now be controlled by selected resistors.<\/p>\n

They control the voltage of the grid between cathode and anode.<\/p>\n

Current and Voltage<\/h2>\n

One distinction that matters in this context is the differentiation between current and voltage.<\/p>\n

You can imagine the current as an amount of water running through a garden hose while the voltage pictures the pressure of the water. This means: the higher the water pressure (the voltage) the more water (the current) runs through the hose in a certain period of time.
\nBy adding a resistor you can \u2013 in this example \u2013 tighten the hose. Depending on how much the resistor tightens the hose you can control the current (amount of water) as well as the voltage (water pressure).<\/p>\n

Impedance and Transformers<\/h2>\n

This kind of resistor is known to be the output-impedance of the tube and is measured in units of Ohms. To protect the speaker this output-impedance has to be send through an output-transformer. Comparable to a pickup the output-transformer is made of copper-coils and is able to reduce the high resistance of the tube so it can be send through the speaker without crashing it.<\/p>","protected":false},"excerpt":{"rendered":"

Sorry, this entry is only available in Deutsch.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[265,3],"tags":[166,1041,144,1039,1030,289,249,1040,241,903],"class_list":["post-788","post","type-post","status-publish","format-standard","hentry","category-amps-guitars","category-effektgeraete","tag-amplifier","tag-ausgangsuebertrager","tag-impedance","tag-impedanz","tag-lautsprecher","tag-roehrenverstaerker","tag-speaker","tag-strom-spannung","tag-tube-amp","tag-verstaerker"],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p9GLlF-cI","jetpack-related-posts":[{"id":5716,"url":"https:\/\/delaydude.de\/en\/jhs-pedals-panther-cub\/","url_meta":{"origin":788,"position":0},"title":"JHS Pedals Panther Cub","author":"Delay Dude","date":"Wednesday October 20th, 2021","format":false,"excerpt":"This is a demo of the @JHS Pedals Panther Cub. 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I tested the Strymon Cloudburst plugin extensively on\u2026","rel":"","context":"In "Allgemein"","block_context":{"text":"Allgemein","link":"https:\/\/delaydude.de\/en\/category\/allgemein-de\/"},"img":{"alt_text":"Strymon Cloudburst Plugin","src":"https:\/\/i0.wp.com\/delaydude.de\/wp-content\/uploads\/2025\/05\/Bild1-1024x576.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/delaydude.de\/wp-content\/uploads\/2025\/05\/Bild1-1024x576.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/delaydude.de\/wp-content\/uploads\/2025\/05\/Bild1-1024x576.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/delaydude.de\/wp-content\/uploads\/2025\/05\/Bild1-1024x576.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":5273,"url":"https:\/\/delaydude.de\/en\/first-flight-through-the-strymon-nightsky\/","url_meta":{"origin":788,"position":2},"title":"First flight through the Strymon NightSky","author":"Delay Dude","date":"Wednesday November 11th, 2020","format":false,"excerpt":"This is a video about my first contact with the marvelous Strymon NightSky. Just lean back and enjoy the flight. https:\/\/youtu.be\/EKZMA4M7CEQ gear: Fender Telecaster, DelayDude Custom Amp, Shure SM57, Cubase, Evidence Audio SIS Cables.","rel":"","context":"In "Other Videos"","block_context":{"text":"Other Videos","link":"https:\/\/delaydude.de\/en\/category\/videos\/other-videos\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/img.youtube.com\/vi\/EKZMA4M7CEQ\/0.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":3549,"url":"https:\/\/delaydude.de\/en\/boss-dd-7-vs-walrus-audio-arp-87\/","url_meta":{"origin":788,"position":3},"title":"Boss DD-7 vs. Walrus Audio ARP-87 – Digital Delay Comparison","author":"Delay Dude","date":"Wednesday March 27th, 2019","format":false,"excerpt":"This is a Comparison of the Boss DD-7 with the Walrus Audio ARP-87. 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