[sdiy] AD821

[Mike Brown]

If I recall correctly, I asked Bernie Hutchins several years ago and he said
that the AD821 could be replaced by a MAT03 in all the electronotes stuff...
he also said you could replace the other transistor pair (AD818?) with a
MAT02.

Ian would probably know a lot more about this than me, though ;)

MB

> -----Original Message-----
> From: owner-synth-diy at dropmix.xs4all.nl
> [mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Ian Fritz
> Sent: Thursday, August 18, 2005 3:59 AM
> To: Kevin Haywood; synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] AD821
>
>
> At 10:47 PM 8/17/05, Kevin Haywood wrote:
> >fellow list members,
> >
> >what the @%#* was an AD821?  i can find *no* information about
> it anywhere
> >- not even a datasheet to help me figure out what an appropriate
> >substitute might be.
> >
> >anyone have 20 or so NOS that they wanna sell?  ; >
> >
> >kevin
>
> Kevin --
>
> Perhaps if you told us what your requirements are we could help
> you find a
> substitute.  Probably the MAT03 would work, unless there is some special
> characteristic of the AD821 you need.  The inexpensive Japanese
> pairs would
> also possibly be OK.
>
> And I do have the data sheet. Just let me know what parameters
> you need to
> know. The main specs are Vbe matching to 1 mV, Ib matching to 10 nA, hFE
> 150-600, breakdown 45 V, noise figure 3 dB.
>
>    Ian
>
>