[sdiy] anyone know what this chip is? M334 7161

[Bob Weigel]

As far as I know Organ service corp still has some.  I have a few also 
like I say. -bob

Roy J. Tellason wrote:

>On Thursday 16 April 2009 06:10:26 am Bob Weigel wrote:
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>>Yeah looks like a typical spider divider to me.  Many organs use those
>>and I possibly even have that exact chip in an old scrap piece of test
>>equipment.  It looks awful familiar :-) -Bob
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>
>After I wrote my initial response to that post numbers came to mind,  like 
>MFC6020, 6040,  etc.
>
>Do you know of any sources for these things these days?  Or are they pretty 
>much unobtainium any more...?
>
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>>Loscha wrote:
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>>>Afternoon Ladies and Gentlemens.
>>>
>>>Please consider the following images:
>>> http://www.loscha.com/images/M334-7161.jpg  155k
>>> http://www.loscha.com/images/M334-7161_small.jpg  20k
>>>
>>>
>>>There are two of these in a thing called an Orgatron (GTR orgatron 2,
>>>      
>>>
>>>from the late 60s-ish, an electronic thing, not the electroacoustic
>>    
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>>>reed organ thingy).
>>>
>>>It was posted about when I first got it on Matrixsynth. Apparantly my
>>>kid sister is a "Synth Babe". That page it links to is 404, by the
>>>way, I don't think I have the sample up online anymore. It sounded
>>>quite crap. A mono square osciallator with a few switched cap static
>>>filters as "stops".
>>>http://matrixsynth.blogspot.com/2006/11/gtr-orgatron.html
>>>
>>>Has anyone seen this part before? The unit has some stops that are
>>>octave down, so, thinking it may be a divider. Seems like an "organy"
>>>type chip, I recall seeing something similar in a Crumar organ/piano I
>>>had 10 years ago.
>>>
>>>Any assistance would be appreciated. Hoping, honestly, that they'll be
>>>able to be given to someone to repair something worth while, instead
>>>of this piece of crap I junked & dumped today!!!!!
>>>
>>>They are both connected up in a similar fashion.
>>>Short pin next to trace (the lump) always goes to earth.
>>>Long pin not on bump end goes to +ve
>>>They are situated in the section of the circuit which is a volume
>>>control. Possibly some kind of VCA or amplifying transistor.
>>>
>>>It's not in my little "cubic" Tech/Eca Asia Pacigic "Up-To-Date
>>>World's Transistors-Diodes-Thyristors & ICs Comparison Tables". (the
>>>Jaycar ones, about 10 years old).
>>>I'm stumped. Am not even sure what package to call it.
>>>
>>>Thanks for your time if you bothered to read my rambling all the same!
>>>
>>>-ErJ
>>>_______________________________________________
>>>Synth-diy mailing list
>>>Synth-diy at dropmix.xs4all.nl
>>>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>>      
>>>
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