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
 10th October 2011, 07:01 PM #1 grungeman91 diyAudio Member   Join Date: Aug 2010 Radiotron question Radiotron says the voltage gain of a power amplifier is 2.82*sqrt(Po*RL). Is this equation used all the time for power amp design, including push-pull?
 10th October 2011, 07:37 PM #2 TheGimp   diyAudio Member     Join Date: Aug 2009 Location: Johnson City, TN Which RDH? 4? Which chapter, page, etc...
grungeman91
diyAudio Member

Join Date: Aug 2010
Quote:
 Originally Posted by TheGimp Which RDH? 4? Which chapter, page, etc...
RDH 4, chapter 13, page 549.

 10th October 2011, 07:47 PM #4 DF96   diyAudio Member   Join Date: May 2007 sqrt(Po*RL) is a voltage, not a gain. The 2.82 factor makes it a peak-peak voltage for a sine wave signal.
grungeman91
diyAudio Member

Join Date: Aug 2010
Quote:
 Originally Posted by TheGimp Which RDH? 4? Which chapter, page, etc...
RDH 4, chapter 13, page 549.

 10th October 2011, 08:06 PM #6 TheGimp   diyAudio Member     Join Date: Aug 2009 Location: Johnson City, TN This is the voltage gain of a triode output stage. As DF96 pointed out, 2.82 is the factor from peak to RMS. The equation you gave is half the necessary information. It relates voltage gain M to power our when known along with the load resistance. The second formulae : M=(Emax-Emin)/2Ec1 defines the voltage gain as the ratio of the maximum output voltage divided by twice the input bias voltage on the grid, assuming an idealized condition where there is no grid current flowing at Vgk=0. From 1 & 2 you can equate output power to voltage gain if you know the load resistance by stating: 2.82 SQRT(PoRl)= M =(Emax-Emin)/2Ec1 Rearanging you get Po=((Emax-Emin)/2Ec1*2.82)^2)/Rl

 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         Holton Precision Audio         CSS         Dx Classic Amplifiers         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 jlsem Swap Meet 8 12th June 2010 01:04 AM Keithj Swap Meet 0 9th April 2007 04:55 AM Frazzled Tubes / Valves 15 26th March 2007 01:07 PM Miles Prower Vendor's Bazaar 0 15th January 2007 09:30 PM apassgear Tubes / Valves 2 1st February 2003 12:03 AM

 New To Site? Need Help?

All times are GMT. The time now is 09:29 AM.