[sdiy] Weird old logic chips & transistors

[harrybissell]

You are correct.  They 'can' be run just like the 4069UB.  That was how Craig
Anderton did the fuzz box on the Timbre Gate project.  When analyzing the design
(with my dad) he said I should 'remove the diodes' because they would 'clip the
shit'
out of the signal. When I told him that was my intention, he went ballistic... "get
out
of here you little bastard, I work all day trying to get RID of distortion and here
you are trying to make it on PURPOSE ???

I might have the schematic, still. It was horrible and noisy, a 741 would be WAY
better.  I would not bother with RTL for linear use. If you had the data sheets,
they
would show you the resistor values inside and you could just use transistors.

H^) harry

Scott Gravenhorst wrote:

> Hmm.  Might there be some analog application for RTL ICs?  I mean, would there
> be a way to run them (like RTL inverters) in "linear" mode something like a
> 4069UB?  I don't know enough about RTL (probably not totem-pole output) to know
> if I'm talking through my hat.
>
> harrybissell <harrybissell at prodigy.net> wrote:
> >Most of your haul is RTL  (two generations pre-TTL)
> >
> >I'm really depressed that your GRANDFATHER had this stuff... I makes
> >me feel very, very old. Even older than I did today as I built a test fixture
> >for work on old-school barrier strips (phenolic with lugs on it... :^).
> >
> >My first fuzzbox used RTL cans... it was from a 1970 article in Popular
> >Electronic called "Timbre Gate" by Craig Anderton.
> >
> >H^) harry
> >
> >Aaron Lanterman wrote:
> >
> >> My parents came to visit this weekend, and my dad hauled along a massive
> >> pile of old electronic parts that he had inherited from my granddad; I had
> >> mentioned I was getting into circuits, and he thought they'd get more use
> >> here with me.
> >>
> >> Anyway, I'm sorting through it - I came across some 74 series I
> >> recognized, as well as a couple LM380N amplifiers, and a whole bunch of
> >> LM324N op amps (which I recall seeing in some synth designs, if I recall
> >> correctly).
> >>
> >> Then there's a whole bunch of weird logic chips. At least, when I type the
> >> #'s into datasheetarchive, they come up as logic chips, with the following
> >> descriptions (quantities I have listed in parens):
> >>
> >> N8416A 3-Input NAND-Function Logic Gate (4x)
> >> N8270A          4-Bit Shift Register (2x)
> >> N8826A          Dual J-K Flip-Flop      (2x)
> >> N8266B (?) (2x)
> >> SP321A          Dual J-K Flip-Flop       (1x)
> >> SP328A          Dual D-Type Flip-Flop    (2x)
> >> SP362A          Single Monostable Multivibrator (5x)
> >> SP380A          1700mV nor gate   Philips (6x)
> >>
> >> MC667P          Dual Monostable Multivibrator (4x)
> >> MC717P          2-Input NOR-Function Logic Gate (1x)
> >> MC719P          4-Input NOR-Function Logic Gate (5x)
> >> MC725 (handwritten) 4-Input NOR-Function Logic Gate (1x)
> >> MC778P Dual D-Type Flip-Flop (5x)
> >> MC789P ? (5x)
> >> MC790P ? (1x) (dual JK flip-flop - from online forum)
> >> MC791P ? (1x)
> >> MC792P   3-Input NOR-Function Logic Gate (1x)
> >> MC793P          3-Input NOR-Function Logic Gate (2x)
> >> MC830P          4-Input NAND-Function Logic Gate (10x)
> >> MC846P          2-Input NAND-Function Logic Gate (1x)
> >> MC894P          4-Bit Shift Register (2x)
> >> MC9820P  2-Input Multifunction Logic Gate (2x)
> >>
> >> Anyone seen these before? What in the world is all this? Are these some
> >> weird pre-TTL kind of technology? Would they be useful in anything now,
> >> i.e. could I interface them with the 74 series?
> >>
> >> After much googling I can't seem to find any actual datasheets.
> >>
> >> Oh, and there's piles and piles of transistors, that I'm just starting to
> >> sort, including a whole bunch of 2n299 germaniums.
> >>
> >> There's quite a few D29A4s and 2n3505... would those be of any use? (When
> >> I look at a transistor data sheet I don't really know what what I should
> >> be looking for...)
> >>
> >> - Aaron
> >>
> >> -----------------------------------------------------------------------------
> >>
> >> Dr. Aaron Lanterman, Asst. Prof.       Voice:  404-385-2548
> >> School of Electrical and Comp. Eng.    Fax:    404-894-8363
> >> Georgia Institute of Technology        E-mail: lanterma at ece.gatech.edu
> >> Mail Code 0250                         Web:    users.ece.gatech.edu/~lanterma
> >> Atlanta, GA 30332                      Office: GCATT 334B
> >
>
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