Dana Wed, 31 Aug 2005 08:15:00 +1000 na news grupi
sci.electronics.repair
osoba pod imenom Franc Zabkar je napisala...

Neither my Towers nor my vrt databooks list the 2SB545, 2SB545A, or
2SD188A. FWIW, the 2SD188 is spec'd for Vce(max) = 70V. Usually the
"A" versions have better specs, eg better Vce or power dissipation or
hfe. NTE parts are rated as good or better than the original, so
knowing that a particular NTE can substitute for both the standard and
"A" versions doesn't really tell you what you need to know. For
example, a 2SD189A has a Vce(max) of 100V whereas the 2SD189 is rated
for only 60V. The NTE sub, an NTE280, has a Vce(max) of 140V.


- Franc Zabkar

Now, I am using Motorola Onsemi TO3 transistors MJ15003 and MJ15004,
and, after all, I think that those transistors will stay in my amplifier
instead original NEC transistors.

Thanks everyone who replied to me!

Regards!

Zeljko