Below was partly copied from the video description on YouTube

PCB Parts list:

Microphone capsule: https://www.jlielectronics.com/microphone-capsules/jli-2555bxz3-gp/

Shipping to the EU is expensive, so I'm working on a group buy. Check back in a few weeks' time!

Transistor

US: https://ebay.us/3m3kyV

UK: https://ebay.us/KYIbZB

China (AliExpress.com): https://s.click.aliexpress.com/e/_AZ1Cqd

THAT1512

US: https://www.newark.com/search?st=that1512

UK: https://ebay.us/wvJUzJ

China (AliExpress.com): https://s.click.aliexpress.com/e/_9ufNNf

USB Audio interface

https://amzn.to/3k43hy7

https://s.click.aliexpress.com/e/_9R7Nkz

USB C breakout board

https://amzn.to/3EJa0Fs

https://s.click.aliexpress.com/e/_9jZgBr

Capacitors

C1, C2, C5 : https://s.click.aliexpress.com/e/_A0ztiz

C3, C4, C6, C7 : https://s.click.aliexpress.com/e/_AmoZrX

JST Connectors

2 pins : https://s.click.aliexpress.com/e/_AYOqTb

3 pins : https://s.click.aliexpress.com/e/_AYOqTb

Resistors

100R : https://s.click.aliexpress.com/e/_9Ar1gt

2k2R : https://s.click.aliexpress.com/e/_9Ar1gt

3k9R : https://s.click.aliexpress.com/e/_9Ar1gt

7mm brass tube

Amazon: https://amzn.to/3BFJ086

eBay: https://ebay.us/pZfjF7

China (AliExpress): https://s.click.aliexpress.com/e/_A1CrZJ

6mm brass rod

Amazon: https://amzn.to/3mEPDDr

eBay: https://ebay.us/LAdYfs

China (AliExpress): https://s.click.aliexpress.com/e/_A1CrZJ

3mm brass rods

Amazon: https://amzn.to/3bCP9Hu

eBay: https://ebay.us/32ofym

China (AliExpress): https://s.click.aliexpress.com/e/_A1CrZJ

72mm 1.5mm nitrile o-rings

Amazon: https://amzn.to/3q6fvtV

eBay: https://ebay.us/y37Lmz

Brass mesh:

https://amzn.to/3mG1Zet

1- 5v +- isolator

https://ebay.us/YIIMNe

Cheaper version (but should work): https://ebay.us/Bwgafo or https://uk.rs-online.com/web/p/isolated-dc-dc-converters/2233683

For the resistors, capacitors, wire, stripboard etc:

https://www.bitsbox.co.uk/

https://s.click.aliexpress.com/e/_AV0cWz

USB C info: https://www.youtube.com/watch?v=V-vFtiDYiIw

If you like to email DIY PERKS : DIYPerks@gmail.com