[sdiy] Weird old logic chips & transistors

[John L Marshall]

RTL will work linear. The 914 was used in linear mode for hobby projects 
back in the day.

RTL = Really Troublsome Logic
TTL = Tried and True Logic

Take care,
John

www.sound-photo.com
47-30-39.02 N, 122-09-51.75 W, elev 440'
----- Original Message ----- 
From: "Scott Gravenhorst" <music.maker at gte.net>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, December 04, 2005 6:00 AM
Subject: Re: [sdiy] Weird old logic chips & transistors


> 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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