<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style></head><body lang=SV link=blue vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>Some more transistors:</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>PMP4201 (NPN), PMP5201 (PNP) matched dual BJT transistors, for expo and ladder filter. Used in Moog Werkstatt.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>J113, MMBFJ113 NJFET for reset switch in saw VCO</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>/Bjorn</p><p class=MsoNormal>Skickades från <a href="https://go.microsoft.com/fwlink/?LinkId=550986">E-post</a> för Windows</p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='border:none;padding:0cm'><b>Från: </b><a href="mailto:synth-diy@synth-diy.org">Oren Leavitt via Synth-diy</a><br><b>Skickat: </b>den 31 december 2021 00:14<br><b>Till: </b><a href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a><br><b>Ämne: </b>Re: [sdiy] Which transistors for synth circuits?</p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Some transistors in my general stock and what scenario I use them in:</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>2N3904/BC847 (NPN), 2N3906/BC857 (PNP), and 2N3819 (N ch JFET), 1N4148 </p><p class=MsoNormal>(Si diode) - most general purpose "jelly bean" stuff.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>BCM847 (dual NPN) and BCM857 (dual PNP) - small SMD matched pairs for </p><p class=MsoNormal>discrete OTA/ladder filters, current mirrors, expo converters, etc.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>SSM2212 (dual NPN) - precision, low rbe expo converter for VCOs.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>MPSA42 (NPN) and MPSA92 (PNP) - high voltage 300V.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>2N5088/5089 (NPN) and 2N5087 (PNP) - high hFE.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>2N4402/4403 (PNP) and 2N4857/4391/4393 (N ch JFET) - Discharge switches, </p><p class=MsoNormal>choppers.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Other small signal and power transistors for occasional hi-fi/power </p><p class=MsoNormal>amplifier projects.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>- Oren</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>On 12/30/21 12:18 PM, cheater cheater via Synth-diy wrote:</p><p class=MsoNormal>> Hi all,</p><p class=MsoNormal>> I was wondering how you pick out transistors (as well as diodes) for</p><p class=MsoNormal>> synth circuits like filters. For example moog filter, 303 filter, etc.</p><p class=MsoNormal>> Do you look for anything in specific? I'm talking about a situation</p><p class=MsoNormal>> where you don't want to use the exact part in the schematic, but want</p><p class=MsoNormal>> to play around with parts and see what comes out of it.</p><p class=MsoNormal>><o:p> </o:p></p><p class=MsoNormal>> Best regards</p><p class=MsoNormal>> _______________________________________________</p><p class=MsoNormal>> Synth-diy mailing list</p><p class=MsoNormal>> Synth-diy@synth-diy.org</p><p class=MsoNormal>> http://synth-diy.org/mailman/listinfo/synth-diy</p><p class=MsoNormal>> Selling or trading? Use marketplace@synth-diy.org</p><p class=MsoNormal>_______________________________________________</p><p class=MsoNormal>Synth-diy mailing list</p><p class=MsoNormal>Synth-diy@synth-diy.org</p><p class=MsoNormal>http://synth-diy.org/mailman/listinfo/synth-diy</p><p class=MsoNormal>Selling or trading? Use marketplace@synth-diy.org</p><p class=MsoNormal><o:p> </o:p></p></div></body></html>