Question About Q1, Q2, etc Values on part list.

[jdduffield]

I’m used to being spoon-fed the transistor part list, but here I have a value range and not sure what it means. I think it means “any transistor with an HFE in this range” but not sure. For example, see Q1 here. I think it wants any transistor (NPN) with an HFE ranging from 140-200. Am I correct?

 

[owlexifry]

you'll also wanna have the right pinout for however the PCB is laid out.

 

[jessenator]

Lol is that one of mine?

Looks like sardine tin / super-fuzz. Yeah, of it's that circuit those are gain ranges. Q4 and Q5 are a pair that would be good to get as close as possible to the same value. But the trimmer for them helps balance it. PM me for the schematic, etc.

NPNs with a gain <100 are harder to find, but the lower the better.

 

[jdduffield]

Lol is that one of mine?

Looks like sardine tin / super-fuzz. Yeah, of it's that circuit those are gain ranges. Q4 and Q5 are a pair that would be good to get as close as possible to the same value. But the trimmer for them helps balance it. PM me for the schematic, etc.

NPNs with a gain <100 are harder to find, but the lower the better.

Yes, this is the Sardine Tin. I finally got around to building it but ran into this question. I think I’ve got all the other parts I’ll need, and I probably have the transistors as I’ve been collecting different ones. I’ll just have to measure some and find a good candidate.

For the enclosure I went with a hand-painted dandelion (for fuzz) on lavender background with gold knobs to match the painting highlights. My wife painted it.

 

[drew.spriggs]

Use the classic RG Keen rule: if you're unsure, a 2N5088 will probably work.

 

[jwin615]

https://www.mouser.com/ProductDetail/onsemi-Fairchild/KSC945YTA?qs=ljbEvF4DwOMWTYZfUrYBYQ%3D%3D

KSC945 look to be a good match for Q1-5 at a beta of 120-240. just bin them.
SynthBearCube has 2sc945s in a few different gain ranges as well.
Match the germanium diode Vf for a better octave effect.

 

[jdduffield]

End result. Went with S9018s. I love it!