[f-cpu] Flying Analog Elephants

[Yann Guidon <whygee@f-cpu.org>]

it's getting furiously off-topic but i can't resist ;-P

Michael Riepe wrote:
> 
> On Thu, Sep 27, 2001 at 05:55:14AM +0200, Yann Guidon wrote:
> [...]
> > > > did i say i'm an audio freak ?
> > > So do you have a TUBE amp too!
> > no, a bunch of LM741 connected in "impedance adapter" mode.
> > well, that's the usual stuff i do : one 8-pin IC per channel,
> > one pair of batteries and some capas for decoupling. However
> > the analog stage of the "Flying calf" (that i'm turning into
> > a real flying elephant :-D) has Motorola 33078 AOPs, and i am
> > trying to find the correct resistors because the current setting
> > eats up almost 30db. i need _very_ sensitive inputs :-)
> Shouldn't you use a less ancient opamp, then?  I won't suggest a 5534
> (it draws too much power), but what about a TL071?
i've had stability problems with newer chips. the 741 works even when
no external R or C is used.
I don't know the 33078, but i search the best resistor ratio to modify the
sensitivity, instead of adding (yet) another analog amplifying stage.

> [...]
> > PS : i'll take pictures when the slaughter is over :-P
> *hehehehehe*
i don't think i can finish it tonight. Tomorrow is the first
day at Jussieu (gaaah!) and i have to be fit...

>  Michael "Tired" Riepe <Michael.Riepe@stud.uni-hannover.de>
WHYGEE
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
PS: Richard, who is John ?...
*************************************************************
To unsubscribe, send an e-mail to majordomo@seul.org with
unsubscribe f-cpu       in the body. http://f-cpu.seul.org/