[sdiy] Cooling in modular synths

rrsounds (null) rrsounds at aol.com
Mon Dec 27 14:39:36 CET 2021

The analog conversion between linear and logarithmic (and vice-versa) scaling using semiconductors often depended upon tightly-coupled (physically) compensating thermistors that were themselves highly temperature-sensitive, and of variable quality. Keeping a steady temperature in the equipment’s environment was often vitally-related to keeping in tune.
As Mattias writes, these problems have been more or less solved in today’s equipment.

I suspect that, like many other generally negative anomalies, the serendipitous effects of temperature drift were, however, seen as beneficial to some people’s art. 

David Reaves

Sent from my iPad

> On Dec 27, 2021, at 2:03 PM, Mattias Rickardsson <mr at analogue.org> wrote:
> Den sön 26 dec. 2021 20:50cheater cheater <cheater00social at gmail.com> skrev:
>> Would you say current designs are less temp sensitive?
> Yes, and put in other words you could say that there have been advances in tuning and temperature compensation since 45 years ago. :-)
> Temperature-dependent deviations have become better understood, temp sensing and compensation can be done closer to the error source - on chip level with less problematic factors, clever microprocessor control can be used, etc.
>> What was the most temp sensitive part in things like a Jupiter 8,
>> CS-80, or a Memorymoog? Or even an original Prophet-10? The last two
>> especially are said to have been very difficult to keep in tune...
> As said before, exponential converters are the most sensitive (but luckily also the most consistent and relatively easy to compensate) in three of the above.
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