Ultralow Noise Tester: 9V Battery vs. 7805 vs. LTZ1000

Details

Description

Try JLCPCBs famous prototyping services: https://jlcpcb.com/
TS80P Soldering Iron Banggood https://bit.ly/312l2ER
Microscope I used to film https://www.welectron.com/Andonstar-AD407-Digital-Microscope
Behind the scenes sometimes https://www.patreon.com/marcoreps

Linear AN124 https://www.analog.com/media/en/technical-documentation/application-notes/an124f.pdf
KiCAD project https://github.com/marcoreps/low_noise_amplifier
EEVBlog Forum thread https://www.eevblog.com/forum/metrology/diy-low-frenquency-noise-meter/
Vintage German Hermetic Tantalum Caps https://www.ebay.com/itm/361575306139

This is a bit of a boring video subject, but by getting it out of the way now, it'll be much easier to focus on whatever we need these noise measurements for later.

0:00 Intro
2:02 Circuit Design
4:12 PCB & Assembly
8:13 TS80P
9:58 Input Cap Problems
15:56 Input Cap Solutions
18:01 Lame results
22:23 Cool results