[sdiy] Buchla 281 part substitutions?

[Oren Leavitt]

The AD821 matched PNP pair has long since become unobtainium - Try 
MAT-03 or 2N3810 or similar, or hand match two PNPs.
CA3080 are readily available.
uA741 is the common 741 op amp with Fairchild's house number.

Oren

J Alexander wrote:

> Looking at Buchla 281 Quad Function Generator schemo on Magnus' site.  
> Dated 1978.
>
>
> Are these good substitutions?
>
>
> Needed               Sub
>
> IC's
> CD4016B           CD4016BE
> CD4001B           CD4001BE
> CA3080             ECG902
>
> Q
> AD821               AD821AN,AD821AR
>
> Diodes
> IN5240             IN5240B
>
>
> Also:
> -I need a substitution for a diode IN457
>
> -The schemo calls for a diode numbered uA741, where 'u' is the micro 
> symbol.  What is this part?  What to substitute?
>
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-- 
Oren Leavitt
oleavitt at ix.netcom.com