SI transistors and hfe values

[scotheath]

When building say a fuzz face using SI transistors does the hfe of Q1 and Q2 matter like when using germanium? When using germanium I've read Q1 hfe should be + - 75 % of Q2 but does that matter when using SI transistors ? Or is that why there are trimmer pots in most SI fuzz faces to get collector of Q2 to proper voltage ?

[mauman]

IMHO, the relative gains of Q1 and Q2 matter with Si as much as with Ge transistors.   Same Hfe targets apply, and as well as the same ratios.

[aion]

Ideally you want both the correct ratios (Q2 50-75% higher than Q1) and the trimmers to fine tune it. The trimmers don't compensate for the difference in hFE, that's a  completely separate thing.