IGBT Still Alive

[Stee]

ciao
see this project with obsolete GT20D101/201



Rs can be an NPN transistor glued on dissipator (AB1 biasing)
+V and -V can be dual 60V
gain ratio 20x (R2/R1) --> 5,7 Vpp input (RCA) can be 114 Vpp output
RL 6 ohm?

 

[east electronics]

is there any thing more

about this ????
114 volt peak to peak ????? am i missing something ????

could please tell me more and also add a complete schematic ???

thank you

 

[Stee]

that is complete

hello

Vpp from RCA is 5,7V (RMS is 2V)
so if you have a gain of 20X
RMS is 40V
Vpp is 114V

correct?

 

[Mooly]

In the UK,
http://cpc.farnell.com/jsp/search/b...gensearch_003&Ntt=igbt&Ntx=&_requestid=484396
now have quite a good range of IGBT devices + other "Audio" semiconductors and caps etc.

 

[unclejed613]

this is a trick question, right? this isn't a circuit where the gain is set by a resistor ratio..... and the devices shown aren't IGBT's. and most line level signals are nowhere near 5Vrms.... more like 1.5Vrms......

 

[Stee]

better graphic

there isn't complementary IGBT on the market ( P AND N CH )

1,5V RMS X20 ----> 30V RMS
30V RMS / 6 Ohm load ----> 5 A
5A X 30V ----> 150W RMS

good power

 

[DigitalJunkie]

That's a good amount of power,for such a simple circuit.
Just add an op-amp/driver to the front end for some more gain,and it should be fine with 'normal' line-level sources.
(you could even wrap GNFB around it,back to the op-amp.)

Interesting.

 

[Stee]

yes sure

or it is possible use a FET buffer for line signal