Recent content by McClinticSphere

Thanks so much! That is extremely helpful. I've been through the pain of the Duophase and a Sagan Delay so I feel like I've proven to myself I can do these high part-count, attention to detail builds. Triple-checking every step is in my nature ha.

Hi Chuck, I'm buying parts for one of these now and wondering what you used for the transistors (I can't find original part #s except on eBay) and the G10k pot?

I almost always buy a 3PDT breakout board from wherever I buy the PCB, but have used PedalPCB ones in other builds. I hate wiring 3PDTs.

There's a schematic at FuzzDog; the 27k is R25 so definitely looks like if it's missing then D3/4 are not in the circuit. I think the confusion comes from the fact that there's a pic of a v1 floating around that has D3/4 populated but R25 is missing. So there are production units that have 2...

I bought some more and it starts to become a bit clearer why the part number is not that helpful in choosing components for this circuit. These are the ranges of h_FE for 2N5088/9s from different sources (number of components in parens). 2N5088 (35) 538 - 659 2N5088 (10) 463 - 522 2N5088 (10)...

I was kinda worried about this after seeing values elsewhere and seeing that the I_c dependence of the h_FE is not very strong, thanks for sharing. I ordered some more of each from different sources to compare.

In an attempt to understand the variables for this circuit a tiny bit better, I measured h_FE of 35 each of NOS (Motorola) 2N5088 and (GE) 2N5089 at 2.5 mA with a DCA55. The 2N5088s range from 538 to 639. The 2N5089s range from 510 to 839. The sample size isn't really big enough to establish...