Discrete components
!

Tempco resistor 1,87K 1% 3500ppm

ARP Odyssey, Axxe
4075 filter
TTSH project

2N5087 matched transistors

Matched to 0,5 mV Vbe and 0,5% Hfe

Provided with copper clip

2N3904/2N3906 matched transistors

Provided with copper clip