SV: Re: [sdiy] Weird old logic chips & transistors

[karl dalen]

I think its a good idea to save the transistor pile,
in case you decide to start to play guitar and 
start to build fuzz foxes! :)

Perhaps you are a low vage assisting professor you
could sell the germaniums at evil bay with some neat
prifit to other fuzz foxer builders, they need
old germaniums!

Reg
KD

--- harrybissell <harrybissell at prodigy.net> skrev:

> 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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>