On Thu, 21 Oct 2004 16:24:04 +0100, Paul Burridge
wrote:

Hi all,

I've tried Googling, but Advanced Semiconductor have screwed the
search up with their worthless crap. What are the basic
characteristics of this device? Po, Ft, Gain, Vsupply, typical
application etc.

from TRW '83

PT9703B
spec @ 400MHz
Pgain 10Wout for Pin 1.5W
Collector efficiency 60%
Cob 12pF
Icmax continuous - 1.25A - note that SOA curves limit at 1.125A.
Vceo 30V
Vces 60V
designed for 28Vcc system Common-Emitter UHF
Isolated package (? from mounting stud, I assume)
Rthjc 8.8degC/W
Tj 200degC limit
Pdiss limit @Tc20deg = 20W

RL