<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">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.<div>As Mattias writes, these problems have been more or less solved in today’s equipment.</div><div><br></div><div>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. <br><div><br></div><div>David Reaves<br><br><div dir="ltr">Sent from my iPad</div><div dir="ltr"><br><blockquote type="cite">On Dec 27, 2021, at 2:03 PM, Mattias Rickardsson <mr@analogue.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="auto"><div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Den sön 26 dec. 2021 20:50cheater cheater <<a href="mailto:cheater00social@gmail.com">cheater00social@gmail.com</a>> skrev:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Would you say current designs are less temp sensitive?<br></blockquote></div></div><div dir="auto"><br></div><div dir="auto">Yes, and put in other words you could say that there have been advances in tuning and temperature compensation since 45 years ago. :-)</div><div dir="auto"><br></div><div dir="auto">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.</div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">What was the most temp sensitive part in things like a Jupiter 8,<br>
CS-80, or a Memorymoog? Or even an original Prophet-10? The last two<br>
especially are said to have been very difficult to keep in tune...<br></blockquote></div></div><div dir="auto"><br></div><div dir="auto">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.</div><div dir="auto"><br></div></div></div></blockquote></div></div></body></html>