AW: More interesting ICs

[Martin Czech]

> 	>Texas Instruments TL441AMJ
> 	>$14.00 ea (approx.)
> 	>this is a temperature compensated logarithmic amplifier.
> 
> This must be a very old chip. I can tell you a story about that,
> though I cannot help you with technical information.
> 
> Guess what it was. I kept it a few years and it finally went to
> the dustbin (;->).
> 
> Those were the days !
> 

Hehe.
You're not the only one, Juergen.  I lived in a village and had no
clue about electronics whatsowever.  Then I stumbled about this Helmut
Tuenker do-it-yourself-synth stuff. This was back in 83.

You needed a uA726 heated npn pair, impossible to get.

Took a while to figure out, that the shop attendee sold me a couple
of window comparators instead of the npn pair...  This is a little bit
different functionality....

Then I asked my uncle to get sone of these marvel chips, he lived near
a distributor, this time I got a small aluminum cigar box with some ESD
sealed 8DIP. I still have them in one of my junk cartons. Needless to
say that they where also the wrong type. One day I'll have a look at
them and find out what they really are...

Ignorance is nice,
but you may pay for it...

m.c.