Awesome graphics! I think my first 10 pedal builds were 1590As and that somehow felt like paying dues.
Great build.
Great build.
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Show posts MenuQuote from: Bret608 on December 17, 2020, 02:07:15 PM
I'm not sure if the leakage adds up, but once I read that for the MkIII Q1 and 2, you should put whichever is lower leakage first. So I did that in the two I've built and have had good results. Honestly though I've never tried any with higher leakage than 0.060mA, so I don't know how much it really matters. The main thing is to make sure Q1 and 2's cumulative hfe is about the same or not much higher than your Q3 hfe--that will keep the fuzz from being too muddy and overcompressed. Also, since you're doing a Pastyface, keep in mind that the bias trimmer on Q3 is really just simulating leakage and is not a voltage starve or something like that. That's most likely because Fuller was using Q3 transistors with more or less no leakage, which the circuit doesn't really like. Use your ear of course, but look for Q3 collector voltages of about 2 to 2.5v. More than 3v still sounds good but gets a bit raspy in my experience. You can go down to 1.5 and it sounds good too, but may be a bit more smooth and tame than you'd like.
Quote from: Bret608 on December 16, 2020, 06:32:33 PM
If you have any in the 40 to 50 hfe range and they're low leakage as well, those are ideal for Q1 and Q2 in a MkIII Tonebender. They're basically working together in a Darlington configuration. If you have any beyond that which are above 70 hfe and leakier, there's your Q3. It's a forgiving fuzz to build and sounds better than most others in my opinion.
Quote from: WormBoy on December 16, 2020, 10:01:06 AM
There's no harm in trying them in a fuzz face ... (or other fuzzes). I played around a bit in the past with hfe around 50 for Q1 and around 20 for Q2, and got some very nice and useful overdriven sounds. Further, you can always use them as a Ge buffer stage or as Ge diodes ...
Quote from: EBK on December 15, 2020, 10:56:42 PMPerfect! That's what I'm after - bootstrapping ideas.
If they are low enough in gain, consider connecting them as Darlington pairs. Smallbear has a page discussing this.
http://diy.smallbearelec.com/HowTos/BreadboardRMs/BreadboardRMs.htm
Quote from: gordo on December 14, 2020, 10:16:32 PMVery sad indeed
Very cool and very sad at the same time...
Quote from: Bio77 on December 14, 2020, 10:38:00 PMThanks. I've probably had that knob 15 years waiting on a box.
Artwork is great and that knob is killer. Great build!
Quote from: Matmosphere on December 14, 2020, 10:42:06 PMThanks
Very cool. It is making me want to listen to those first two records again.
Quote from: cooder on December 14, 2020, 10:45:21 PM
.... here's the early one Eddie used and his early board.
Quote from: Haberdasher on December 14, 2020, 09:25:52 PM
Nice, I love black pedals.
And, woohoo! This is the first time I've seen someone using these in a build. Glad you had good results.