My build progress

[Dud]

here’s the thread with the circuit i 've used

Matched transistors circuit

For the VCF Parker/Steiner i need 2 matched transistor BC547 i find this schematic in an thread, but which Diode must i’ve to use in this circuit please 1N5817 can do the trick ? thx [matched transistor circuit]

and here

Transistor matching