What would be a good project to use some old parts JAN 2N2920 LH0002CH

[ubxf]

I just found a handful of those transistors and I was wondering if there was any audio applications they could be used in.

 

[Gus]

the LH0002CH with a good opamp can make a great buffered opamp

 

[ubxf]

Thank you Gus

 

[Voyager10]

The 2N2920 would work as the input pair in a discrete op-amp, although the noise figure doesn't look brilliant.

It has a relatively high collector-emitter voltage of 60V so would also work as the input pair in a power amplifier.

As @Gus mentioned you could use the LH0002 to buffer an op-amp output. The specs are right for a high-output headphone amplifier. With a good modern op-amp this could be very high performance.

 

[ubxf]

Thank you Voyager I'll get going in those directions and see if I can manage to use them .

 

[JohnRoberts]

You might be able to find some old application notes for the LH002 like this https://www.ti.com/lit/an/snoa725a/snoa725a.pdf
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I am not a fan of designing stuff just to use up old parts. I recall more than once at Peavey when trying to use up old parts actually generated more scrap.

JR

 

[Voyager10]

The BUF634 and (more recent) LME49600 buffers do the same basic job as the LH0002 and are popular for audio amplifiers. There's a BUF634 app-note here: https://www.ti.com/lit/an/sboa065/sboa065.pdf which shows the basic hook-up with an op-amp, as well as many designs floating about on other (inferior, naturally) internet audio forums.