[sdiy] Davolisint Glide (T1/T2) Problem

Tony Allgood oakleysound at gmail.com
Sat Sep 9 10:31:05 CEST 2023


The emitter of the follower could be oscillating. Have you put an 
oscilloscope on the output?

When I see circuits working without, or with extra capacitance, on the 
output it usually means it's unstable. I don't know whether Sziklai 
pairs are less stable than Darlingtons but that 100pF across the 
base-collector on the first transistor looks to me that there could be a 
stability issue that the designer has tried to tame.

Tony

www.oakleysound.com


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