[sdiy] DIP LM13700 discontinuation

[Michael E Caloroso]

The reason why the TLE2062 was used in the OBMx instead of the Buchla
preferred TL07x/06x is before Don was brought on board, Gibson CEO
Henry J stockpiled parts to build production OBMx units before a
working prototype was even completed.  You NEVER do that.  The
pre-Buchla prototype was never satisfactory, Gibson was paying
expensive warehouse costs for these parts that couldn't be used, and
the value of these components were dropping like a rock.  So when
Buchla was brought in, it was under the condition that the purchased
components had to be used wherever possible.

MC

On 5/28/21, mark verbos via Synth-diy <synth-diy at synth-diy.org> wrote:
> So weird Brian.
>
> I was talking about these yesterday afternoon. I have never heard them
> mentioned before now. TLE2062 is used a bunch in the OB-MX, which of course
> was designed for Gibson/Oberheim by Don Buchla using many parts they already
> had(or so the story goes). Since Don never used anything besides TL082 and
> TL062 starting in about 1975 (OK an LM301 here and there), I was trying to
> figure out why he used those here (They are 10x the price after all). It
> could be that this was not on his dime, so he used what he really wanted to.
> It could be that they already had them. It could be that he always wanted to
> use them, and it was the first chance he got (it was 1994). Anyway, it seems
> that with them he got the low power benefit of the TL062 and the higher slew
> rate of the TL082 all in one overpriced package. There are 20 per voice
> card. With 6 cards in there, the current would start to add up…
>
> Mark
>
>
>
>
>
>
>
>> On May 27, 2021, at 9:47 PM, Brian Willoughby <brianw at audiobanshee.com>
>> wrote:
>>
>> I consider the Excalibur series of op-amps to be the cream of the crop. I
>> assume they're just modern versions of the TL082 and TL072, et cetera.
>>
>> TLE2082
>> TLE2072
>>
>> Plus the usual single, dual, quad options, through-hole and SMD.
>>
>> Of course, there are 10,000 op-amps to choose from, and it always depends
>> upon what you're hoping to accomplish.
>>
>> Brian
>>
>>
>> On May 26, 2021, at 10:51, Benjamin Tremblay via Synth-diy
>> <synth-diy at synth-diy.org> wrote:
>>> So, it’s just a cream-of-the-crop bifet op amp. Nice. For me who does not
>>> even use tempco resistors or balanced outputs, probably too nice. It’s
>>> the pearl and I am the swine.
>>>
>>> Benjamin Tremblay
>>
>>
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