User Name Stay logged in? Password
 Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read Search

 Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

 Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
 7th January 2006, 09:56 PM #1 jaymanaa   diyAudio Member   Join Date: Jan 2006 Location: Kansas need schematic reading help Hi, after much reading and a few headaches I am trying to build my first amp. I am using a schematic that I found on boozehound labs. This being my first attempt at reading one, I have had several hurdles. The 2 that have me stumped are how to know watt values on the resistors, and where can I find tube pin connection diagrams. My thinking is that building this (simple) single ended amp will help me in my quest to understand tube audio circuits. Many many thanks in advance to anyone who has any advice. jayman
 7th January 2006, 10:09 PM #2 Sherman   diyAudio Member   Join Date: Feb 2004 Location: Chicago area Jayman, Welcome to the world of vacuum tubes! A simple SE design really is a good place to start when trying to learn about tube audio. Check the notes in the margins of the schematics (if there are any) for the wattage of the resistors. In general you can use 1/2W resistors everywhere in the amp circuit except for the plate resistor and the cathode resistor of the output. You can calculate the required wattage for those resistors by using Ohm's law. You know the voltage to the resistor and the current draw of the amp section (input our output). So calculate the power through the resistor. To be safe double that amount. If your calculation says for instance there is 1/2W there use at least a 1W resistor. For pinouts check the data sheets for the tubes. Another great resource is Duncan Amps TDSL (Tube Data Sheet Locator). There is also a free downloadable version of TDSL you can run on your computer that has data about hundreds (thousands?) of tubes including pinouts and links to their data sheets. __________________ --Sherman
 7th January 2006, 11:57 PM #3 jaymanaa   diyAudio Member   Join Date: Jan 2006 Location: Kansas Thanks Sherman, There was a note stating that resistors were vishay 1/2 watt and 3 watt from mouser. I will however do the calculations as a math exercise! I am amazed at how helpful everyone in this hobby seems to be! Thanks again, Jayman

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Site     Site Announcements     Forum Problems Amplifiers     Solid State     Pass Labs     Tubes / Valves     Chip Amps     Class D     Power Supplies     Headphone Systems Source & Line     Analogue Source     Analog Line Level     Digital Source     Digital Line Level     PC Based Loudspeakers     Multi-Way     Full Range     Subwoofers     Planars & Exotics Live Sound     PA Systems     Instruments and Amps Design & Build     Parts     Equipment & Tools     Construction Tips     Software Tools General Interest     Car Audio     diyAudio.com Articles     Music     Everything Else Member Areas     Introductions     The Lounge     Clubs & Events     In Memoriam The Moving Image Commercial Sector     Swap Meet     Group Buys     The diyAudio Store     Vendor Forums         Vendor's Bazaar         Sonic Craft         Apex Jr         Audio Sector         Acoustic Fun         Chipamp         DIY HiFi Supply         Elekit         Elektor         Mains Cables R Us         Parts Connexion         Planet 10 hifi         Quanghao Audio Design         Siliconray Online Electronics Store         Tubelab     Manufacturers         AKSA         Audio Poutine         Musicaltech         Aussie Amplifiers         CSS         exaDevices         Feastrex         GedLee         Head 'n' HiFi - Walter         Heatsink USA         miniDSP         SITO Audio         Twin Audio         Twisted Pear         Wild Burro Audio

 Similar Threads Thread Thread Starter Forum Replies Last Post Renron Multi-Way 14 15th January 2008 08:31 PM flatpicker Parts 2 7th January 2008 06:44 PM orson198305 Instruments and Amps 9 26th May 2006 03:23 AM Sandor Digital Source 3 8th January 2006 01:59 AM sobazz Multi-Way 0 25th January 2004 10:47 AM

 New To Site? Need Help?

All times are GMT. The time now is 07:08 AM.