Easy to find, inexpensive audio power transistors (BJT and FET)?

[Gigapod]

Can the amplifier gurus at large here suggest a few complementary power output transistors that are:
- General purpose.
- Easy to find, with various suppliers or possibly with equivalences.
- Inexpensive.
- Modern (will still be around five years from now).

Thank you very much for your contributions.

[XEAGLEKEEPER]

What is your idea of expensive?

[wputera]

How about panasonic's 2SK1104 and 2 SJ164?

[lineup]

.
Audio Power Output Transistors:

MJL21193 and MJL21194

or
MJ21193 and MJ21194

My driver stage uses MJE15030 (PNP) and MJE15031 (NPN) which are available in the TO220 case style.

For the output stage, I substituted MJ21193 and MJ21194 which come in the TO3 case style.
The same parts, but with slightly lower Pdiss,
are also available in the TO264 package with part numbers MJL21193 / MJL21194;
these should be easier to mount to a heatsink if that is important to you.
Audio Projects
Hiraga "Classe A" Amplifier
.

MJL21193, MJL21194
Preferred Device
Silicon Power Transistors
The MJL21193 and MJL21194 utilize Perforated Emitter
technology and
are specifically designed for high power audio output,
disk head positioners and linear applications.

Datasheet - OnSemi MJL21193 & MJL21194
.

Lineup Audio Labs
lineup

[lineup]

Originally posted by Gigapod

- Inexpensive.
.

Originally posted by XEAGLEKEEPER

What is your idea of expensive?
.

Gigapod and XEAGLE.

If you are to build a normal power amplifier
then Output Power Transistors are not a very high % of cost.
Not even when using really top class devices ( which I think we should and can afford ).

In my experience,
The big costs in a Power Amplifier are:
- Chassis
- Transformer + eventually Big Filter electrolytic caps
- Heatsink


If you can put this or that much money,
just to make your amplifier chassis outside look nice, almost perfect,
at the images you will post here at www.diyaudio.com
.. then you can afford to make the output stage have very fine transistors, too.


Anyone that really did count the total cost of a DIY Amplifier
will see that this is true, with a few exceptions, of course.
( For example using recycled chassis from defect old amplifiers
can give you nice amplifiers chassis. )


lineup

[XEAGLEKEEPER]

Lineup
My question was for gigapod. When I build a project I generally get the best for the application reguardless of cost. My idea of expensive and his Idea are probably way different.

[lineup]

Originally posted by XEAGLEKEEPER
Lineup
My question was for gigapod.

My answer was more for friend Gigapod.
I just added your quote, because it was a part of the context in this topic.

So XEAGLEKEEPER,
you have any good Power Output recommendations?
BJT or MOS doesn't matter - as he wants both

[Gigapod]

Originally posted by XEAGLEKEEPER
What is your idea of expensive?

Hi XEAGLEKEEPER,
TIP3055 + TIP2955 = 3euros ($3.75) (retail) inexpensive,

SAPM01P + N = 22 euros ($29) (retail) expensive.

Something good in between?

Thanks,
G.

[Gigapod]

Originally posted by wputera
How about panasonic's 2SK1104 and 2 SJ164?

Hi wputera,

These are not available at my usual supplier. How much do you usually get them for and why do you recommend them?

Thanks,
G.

[Gigapod]

Originally posted by lineup

...
If you are to build a normal power amplifier
then Output Power Transistors are not a very high % of cost.
...

lineup

Hi lineup,

You are right, I agree very much. I was just asking because I want to try a few amplifier prototypes and I am afraid I'll pretty much destroy the power transistors.
So I wanted something not too expensive to dest... experiment with.

You mention the MJE15030 and MJE15031 in TO220 package. I can get these for 3 euros / pair. Is that inexpensive or not? Are they any good for experimenting? Better than TIP3055/TIP2955?

Thanks for your input (and patience),
G.