Transistor Dissipation and Turbo Projects
 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

 Pass Labs This forum is dedicated to Pass Labs discussion.

 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
 17th April 2013, 05:17 AM #21 EUVL   diyAudio Member   Join Date: Oct 2003 For your reference, free download : http://www.linearaudio.net/images/st...%20PK%20lr.pdf F5X -- the EUVL Approach Patrick __________________ xen-audio.com
 17th April 2013, 06:40 PM #22 ra7   diyAudio Member   Join Date: Feb 2009 That was very helpful, Papa. Thanks! I like your other rule of thumb also: you should be able to keep your fingers on the heatsink for 10 seconds.
el_mariachi
diyAudio Member

Join Date: Mar 2006
Location: highlands
Quote:
 Originally Posted by albertNL I am sorry, but it is late and I am lost. Tj = W * (Rj + Rc + Rh) + Ta Tj = 16 * (1 + 1 + 2) + 25 Tj = 16 * 4 + 25 Tj = 64 + 25 Tj = 89 Where did 116 come from?
I know this is an old thread but i also find this confusing.
Maybe someone could explain a little further.

diy_audio_fo
diyAudio Member

Join Date: Jul 2004
Location: Italy
Quote:
 Originally Posted by el_mariachi I know this is an old thread but i also find this confusing. Maybe someone could explain a little further.
You can model the thermal circuit as an electrical circuit [Thermal unit = Electrical unit]:

Thermal resistance (Rth) = R
Power (W)= I
Temperature (T)= V

From Ohm's law

V = I * R
T = W * Rth

https://en.wikipedia.org/wiki/Thermal_resistance

2 picoDumbs
diyAudio Member

Join Date: Sep 2013
Quote:
 Originally Posted by el_mariachi I know this is an old thread but i also find this confusing. Maybe someone could explain a little further.
Most likely a simple mistake
__________________
"If you leave this point unattached to some circuitry, an ideal constant current source will emit a small lightning bolt which will travel until it connects to something." Nelson Pass

 23rd April 2016, 06:14 PM #26 Nelson Pass   The one and only     Join Date: Mar 2001 Yes, should have been +25, and old calculator. (me)
 23rd April 2016, 07:56 PM #27 Zen Mod   Official Court Jester diyAudio Member     Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain yup but even with + instead of - , it can't be 116 however , what's small typo between friends ....... logic is what counts __________________ my Papa is smarter than your Nelson ! clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
 23rd April 2016, 08:01 PM #28 Gyuri   diyAudio Member     Join Date: Nov 2003 Location: Budapest Papa just put to the test us. __________________ Those who would have deserved the life they are all dead already. "Oh, my dead dears!" - Captain Cat
Zen Mod
Official Court Jester
diyAudio Member

Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
even if flawless - when making amps ,he's deadly serious ..... in same amount as Kung Fu Panda

however , when numbers and words are in case , ya better read between the lines
Attached Images
 kung-fu-panda-Pa.jpg (169.3 KB, 257 views)
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM

Last edited by Zen Mod; 23rd April 2016 at 08:15 PM.

 23rd April 2016, 08:18 PM #30 Zen Mod   Official Court Jester diyAudio Member     Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain I found Da Logic : Tj = W * (Rj + Rc + Rh) + Ta Tj = 16 * (1 + 1 + 2) + 25 Tj = 16 * 4 + 25 Tj = 64 + 25 Tj = 89 now , just add 42 so Tj= 89+42 Tj= 116 __________________ my Papa is smarter than your Nelson ! clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM

 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     Room Acoustics & Mods     Music     diyAudio.com Articles     Car Audio     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         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 Boscoe Solid State 3 22nd November 2011 11:11 PM Neutrality Solid State 2 19th December 2010 05:41 PM xeclipse Solid State 1 18th December 2010 06:16 PM nigelwright7557 Solid State 11 26th May 2008 02:55 PM

 New To Site? Need Help?

All times are GMT. The time now is 12:06 PM.