Pcbs Tubelab se first version
http://tubelab.com/designs/tubelab-se/ with 2 regulator Sharp PQ5EV5 voltage regulator 1 is extra
Amb a1
https://www.amb.org/audio/sigma11/ pcb v2
free Mystery Borbely PCB
$55 $6 us shipping
http://tubelab.com/designs/tubelab-se/ with 2 regulator Sharp PQ5EV5 voltage regulator 1 is extra
Amb a1
https://www.amb.org/audio/sigma11/ pcb v2
free Mystery Borbely PCB
$55 $6 us shipping
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