[sdiy] What is this IC?

[Michael E. Caloroso]

ECG also publishes very sparse specifications - for a reason.  Some of 
their components are rejects from OEMs, parts that fail temperature 
extremes, gain-bandwidth, offset errors, or are just on the harry (sorry 
:) edge of failure.

I was repairing this Farfisa for a friend and I bought PNP germaniums 
from Unicorn (twenty minutes from me).  Half the transistors died within 
minutes of power up (I used heat sinks on the leads and am very 
conscious of heat from soldering irons).  Major PITA buying multiple 
packages hoping to get some solid parts...

MC

harrybissell wrote:
> ECG was a line of replacement parts... now its NTE.  At some times in the
> past you could get their replacement guides for free...
> 
> ... but be warned. Some parts are crossed to incorrect things, and others are
> very
> expensive where the original parts are still available...
> 
> H^) harry
> 
> Scott Stites wrote:
> 
> 
>>Thanks, Fabio!  What is this ECG you speak of - is it a book, software
>>program?
>>
>>Cheers,
>>Scott
>>
>>----- Original Message -----
>>From: "fmg" <1984 at softhome.net>
>>To: "Scott Stites" <scottnoanh at peoplepc.com>
>>Cc: "synth-diy" <synth-diy at dropmix.xs4all.nl>
>>Sent: Saturday, February 14, 2004 3:25 PM
>>Subject: Re: [sdiy] What is this IC?
>>
>>
>>>Hi Scott,
>>>
>>>My ECG says:
>>>
>>>221-235 > ECG992
>>>
>>>and my Anti-ECG says:
>>>
>>>ECG992 > 2900N, CA3401E, LM3900
>>>
>>>Hope it helps
>>>
>>>Fabio Gonzalez
>>>
>>>
>>>Scott Stites wrote:
>>>
>>>>Hi,
>>>>
>>>>I'm hoping someone on the list can help me identify an IC - I have a
>>
>>tube of
>>
>>>>ten of them, and I'd like to know if they would be useful in any synth
>>>>endeavours.
>>>>
>>>>They're 14 pin DIP's labeled '221-235'.  Beneath that, they have '014
>>>>M8151' printed on them.  There is no manufacturer identifier on them.
>>
>>I've
>>
>>>>googled and found nothing.  Does anybody know what these things might
>>
>>be?
>>
>>>>Thanks,
>>>>Scott
>>>
> 
>