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These are the ultra-rare parts that you may have problems getting


====== AN6562 ======
You'll need two of these dual op amps. They are hard to get, but you can probably substitute a  [[http://www.national.com/mpf/LM/LM358.html|LM358]] or any other rail-to-rail opamp that can go up to 30V input.

[[http://www.ladyada.net/media/x0xb0x/datasheets/AN1358.pdf|Datasheet]]


====== BA662 - Rohm ======
Ultra-rare. You're unlikely to ever find these unless they're pulled

[[http://www.ladyada.net/media/x0xb0x/datasheets/LA4140orig.pdf|OLd Datasheet]]
[[http://www.ladyada.net/media/x0xb0x/datasheets/LA4140sanyo.pdf|New Datasheet]]

Pinout in [[http://www.ladyada.net/media/x0xb0x/TB-303_service_notes_1982.zip|TB303 service notes]]

====== BA6110 - Rohm ======
A good substitute for the '662 if you current mirror the input. A little noisier though.

[[http://www.ladyada.net/media/x0xb0x/datasheets/BA6110.pdf|Datasheet]]

====== LA4140 ======
Headphone amplifier. Rare part.

Pinout in [[http://www.ladyada.net/media/x0xb0x/TB-303_service_notes_1982.zip|TB303 service notes]]


====== 2SC2291 ======
Very rare, hard to find.

A possible alternative is [[http://www.mouser.com/search/ProductDetail.aspx?R=NTE44virtualkey52600000virtualkey526-NTE44|NTE44, which you can buy from Mouser]]

====== 2SC1583 ======
Somewhat rare, hard to find.

A possible alternative is [[http://www.mouser.com/search/ProductDetail.aspx?R=NTE42virtualkey52600000virtualkey526-NTE42|NTE42, which you can buy from Mouser]]

[[http://www.ladyada.net/media/x0xb0x/datasheets/2SC1583.pdf|Datasheet]]

====== 2SA733P ======
You can buy these from Mouser, as they are still being manufactured!

[[http://www.mouser.com/search/ProductDetail.aspx?R=2SA733Pvirtualkey51210000virtualkey512-2SA733P|Buy from Mouser]]

====== 2SC536F ======
Somewhat rare, hard to find.

====== 2SK30A ======
[[http://www.ladyada.net/media/x0xb0x/datasheets/2SK30.pdf|Datasheet]]
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