"WAYNE CHIRNSIDE" bravely wrote to "ROY J. TELLASON"
(14 Jan 04  09:55:00)
 --- on the heady topic of "Re: BAG OF CHIPS"

 -=> ROY J. TELLASON wrote to GREG MAYMAN <=-

 RJT> Yeah.  I still have a "709" or two around,  and maybe an
811 (which I'm
 RJT> sure nobody has ever heard of),  stuff like that.  They were actually
 RJT> considered superior to the 741 for some uses,  though I can't recall
 RJT> which uses those were offhand.

 WC> The 709 was an excellent high gain amplifier.
 WC> I made quite an impressive little hugh gain preamp with one.
 WC> Two compensation caps required, anti-latchup diodes
 WC> at inputs and it even required ferrite beads as it'd pick
 WC> up stray radio signals.

I saw a mag phono preamp design using a 709. The 709 had very low input
noise. You're right about it picking up rfi, and the latchup problem
made it just ugly. The main problem with the 709 was that it had a very
low slew rate and suffered from a lot of output crossover distortion.
Good thing the 5532 came along as it could even be used as line driver.
However the 5532 is prone to oscillation in some circuits.


 WC> You're right, never heard of a 811.

It could be a misprint or house number?

 Mike
 ****

... I worked hard to attach the electrodes to it.
--- Blue Wave/DOS v2.30