Obsolescence of groovy synth parts

[Rick Jansen]

In message <19990720121801.80589.qmail at hotmail.com> you write:
> Rick,

> we hope transistor arrays will be around, the way things are looking I cant
>  
> see it happening... seems funny that despite the likes of the UA726 and 
> SSM2220 being scrapped in favour of better parts, that the 741 still 
> remains... dont flame me, Im all for it, if it works why mess with it?

The uA726 and SSM are very specialistic chips, the 741 is a terribl(y)(e)
common one. I guess only us, a group of a few hundred people, would
be interested in a few 726's, the rest of the world has moved on to
digital solutions probably :-) Even when it was still in production
the 726 was a specialty item, and expensive! 

Apparently transistor arrays are used in lots of other applications than
electronic music, and as long as analog circuitry is being designed
and manufactured I'm sure they will be available. And as long as min.
4-transistor arrays are manufactured we can build temperature compensated 
exp-converters "easily". 

Oh, and we need OTA's! It's not easy to build VCA's and VCF's without OTA's.
The Moog filter is an OTA, in a way...   I just noticed National Semi
has issued a "lifetime buy" status for the LM13600, the LM13700 still is in
full production. There aren't many OTA's really, are there? The only other 
OTA I know is the CA3080...

Rick Jansen
__
rick at bpa.nl rja at euronet.n   http://www.euronet.nl/~rja/
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