WAYNE CHIRNSIDE wrote in a message to ROY J. TELLASON:

-=> 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. Two
 WC> compensation caps required, anti-latchup diodes
 WC> at inputs and it even required ferrite beads as it'd pick
 WC> up stray radio signals.

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

Back around 1970 or so I was hooked up with a recording studio in
Baltimore.  We went around to talk to various reps,  at one point,  and I
got one of those as a sample,  along with a bunch of data sheets.  The mfr
was "Amelco",  if I'm remembering right -- a division of
Teledyne?  Can't say I've heard of them before or since though.  I may stil
have that part somewhere.  In a little plastic carrier thingy.

 GM> I remember the hoohah that heralded the 741, the very first op-amp
 GM> with internal compenstaion that would work right down to unity
 GM> gain!

 RJT> Heh.  I had a lot of trouble back then because of not having the proper
 RJT> information to use a lot of those chips.  I'm still not sure where I'd
 RJT> look for it offhand if I needed it,  though I do have that op amp
 RJT> cookbook around here someplace.

 WC>  Great book.

And I haven't looked at it in ages.  Maybe I'll get back into it when I
find the time.

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