http://www.beis.de/Elektronik/LNPreAmp/LNPreAmp.html
Have you seen this?
It's nothing new to use HF or RF transistors as low noise input transistors. Even Elektor had such a design many years back but this german has done a very good article about this.
Have you seen this?
It's nothing new to use HF or RF transistors as low noise input transistors. Even Elektor had such a design many years back but this german has done a very good article about this.
Hi,
interesting and achieved way below (better than) his already good target.
Sounds like it will be worth following to see developments.
interesting and achieved way below (better than) his already good target.
Sounds like it will be worth following to see developments.
I have read Uwe's directions for emailing and although this is a matter of course, something that is obvious, many people should think more about how the write messages to strangers. The least you can expect is a message signed by the name.
Compare the directions from Rod Elliott
http://sound.westhost.com/contact.htm
Compare the directions from Rod Elliott
http://sound.westhost.com/contact.htm
The limitation of this design is the active noise injection from the current sources. Check it out.
T3, T5 and T6 sure contribute some noise, I can't tell off-hand though how large the contibution really is. With an undegenerated BJT input (not low-gmish JFET) second-stage contribution can usually be ignored.
Samuel
Samuel
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