Dana Sat, 04 Aug 2007 09:09:42 -0700 na news grupi
sci.electronics.repair
osoba pod imenom je napisala...

Tamb=25C vs Tcase = 25C wont explain that much difference. You dont
use 20w trannies as drivers in a tr amp.

But in datasheet you can read two different values for Pc (collector
power dissipation). First Pc data is really 1W and second Pc data has
notice "Value at Tc=25" and that second Pc has 20W.


Also your betas are different, 60 may be not enough.


No problem about that, beta is for my model with mark "C" from 100 -
200.



I wouldnt choose a 20w tr as a driver. It may well work tho.


I wil not use them as drivers, I will use them as pre-drivers instead
2SA818/2SC1628 or instead 2SA939/2SC2071.
Please take a look at http://tinyurl.com/2xgp3o and you will see that
G8000 has as drivers 2SA968/2SC2238.

Regards!