Ed, I wasn't commenting on the type of op-amp. Obviously there are a lot
better op-amps then the 741. What I was commenting on was the three gain
control pots.

-Larry


----- Original Message -----
From: "ed thelen" 
To: 
Sent: Tuesday, November 06, 2001 8:52 PM
Subject: Re: laser seismograph


> You have me curious -
> How is the 747 different from any other noisy, drifty, hi-input current,
> op-amp from the early 1970's  ??
>
> Feedback is feedback isn't it?
>
> The modern op-amp designs  seem so much better.
> "I'd walk a mile for a camel - no no that should be chopper
stabilization."
>
> (And I have used my share of 747's when they were about
> the only game in town "for the rest of us".)
>
> Cheers
>    Ed Thelen
>
> ----- Original Message -----
> > From: "Larry Cochrane" 
> >
> > I like the 741 op-amp circuit. It has three different ways of
controlling
> the gain!
> >
> > -Larry Cochrane
> > Redwood City, PSN
>
>
>
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