Search found 292 matches

by terkio
Thu Feb 07, 2019 8:44 am
Forum: Pro Audio Design
Topic: A Low Noise Balanced Input Moving Coil Preamp Using the ZTX851
Replies: 498
Views: 388104

Re: A Low Noise Balanced Input Moving Coil Preamp Using the ZTX851

Thanks for your welcome and fast answer. I forgot to mention the preamps I worked on use two LM394 cross parallelled. I am impressed by the ZTX851 and the most excellent work you made from it. The noise figure is great. I see matching can be better than the 500uV I figured from reading earlier posts...
by terkio
Thu Feb 07, 2019 5:44 am
Forum: Pro Audio Design
Topic: A Low Noise Balanced Input Moving Coil Preamp Using the ZTX851
Replies: 498
Views: 388104

Re: A Low Noise Balanced Input Moving Coil Preamp Using the ZTX851

I am very interested in this thread. I built a mic preamplifier using 4 modules based on the Grahem Cohen double balanced design. I am so found of this design, I wish to build more, but the major trouble is the availability of low noise matched bjts. I found this: AS194 AS394 Matched NPN transistor ...