/members-area/personalblogs/b/blog/posts/noise-transistor-preamp-3Introduction About time I did some more blogging. This one will be a confused mess as I try to untangle and document some of what I&#39;ve just been doing: regard it as a few &#39;notebook&#39; pages rather than a coherent blog effort. I&amp;#3...en-USTelligent Community 12https://community.element14.com/members-area/personalblogs/b/blog/posts/noise-transistor-preamp-3Thu, 01 Jul 2021 00:44:21 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c7ae3d29-b17a-434f-9783-47d55c8e7659shabaz2<p>Hi Jon,</p><p>&nbsp;</p><p>This is a great project, it&#39;s nice to see the simulation and the measurements, and from what little I know, the Tek scopes give a very accurate RMS measurement, since they use all the sample points within whatever selected gating period as I understand, whereas some &#39;scopes use just the displayed pixels to compute that!</p><p>Also nice that you&#39;ve got the plastic film caps, they are rare to find : ) Like you probably, I keep some BC549&#39;s purely due to their low-noise title on the datasheet : )</p><p>As you say, this is an awesome capability for a &#39;scope, the results look really good. I too wanted to carry on with the measurement amplifier work and just recently ordered a few parts for its next iteration, but my order got hit with shortage issues, it&#39;s getting to the point that alternatives need to be ordered too, just in case a part becomes out of stock by the time it is supposed to be fulfilled : (</p><img src="https://community.element14.com/aggbug?PostID=11546&AppID=293&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/members-area/personalblogs/b/blog/posts/noise-transistor-preamp-3Thu, 01 Jul 2021 00:42:37 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c7ae3d29-b17a-434f-9783-47d55c8e7659phoenixcomm0<p>nice job! noise is a PIA!</p><p>~~Cris</p><img src="https://community.element14.com/aggbug?PostID=11546&AppID=293&AppType=Weblog&ContentType=0" width="1" height="1">