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Topics - Bio77

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General Questions / VFE Switching Board Zener Diode
« on: August 08, 2020, 05:19:14 PM »
I'm building an Alpha Dog and just realized I don't have an 18V zener for the switching board. Would a 16V zener give similar results? 

Tech Help - Projects Page / Collosalus 2015 won't bias??
« on: July 25, 2020, 03:32:43 AM »
I have a working unit from a few years back.  I built a new one, clock sets up nice but it won't bias (judged by scope).  Switched the 3007 from the old one into the new one, same problem.  Socketed R32, tried lower and higher values, same problem. Is R32 the right value to change? Am I missing something else? Any help would be greatly appreciated.

General Questions / Op Amp Fidelity
« on: July 11, 2020, 10:15:57 PM »
A lot of the older flangers and BBD delays use a 4558 Op Amps, which I love in a overdrive circuits but I want something cleaner in these type of circuits.  I often sub in OPA2134s.  I was looking for a ranking of fidelity for different Op Amps, does anyone have this?  Basically, I'm looking for a list with OPA2134 at the top and other Op Amps that might be good enough but not cost 5 bucks per below.

General Questions / Touchstone Vibe Mod
« on: April 29, 2020, 10:03:31 PM »
I'd like to add a vibe switch to the Touchstone.   Build doc recommends lowering R23, so, I thought a jumper across would work.  Mods I've found on the web recommend pulling out the other side of the mix (R22).  Are they the same? Seems like there might be a volume change with the jumper choice. 

Open Discussion / COVID Detecting FET
« on: April 29, 2020, 12:00:11 PM »
Thought this was cool and tangentially related to pedals...Who knew!

General Questions / VB-2 Vibrato Clock Frequency
« on: April 12, 2020, 02:43:43 PM »
I finished up a BYOC Vibrato.  It's a clone of a Boss VB-2.  I'm wondering what to set the clock frequency to?  Should be the same as a CE-2. 

General Questions / Volume Pot Question
« on: March 29, 2020, 12:22:01 PM »
I'm building a DOD 250 and I do not have the A100k for the volume pot.  The volume pot is the last thing in the circuit with pin1 to ground, pin 2 to output, and pin 3 coming from the circuit.  Does the value for this pot matter or change the feel of the circuit at all?  It's just a voltage divider, correct?  Would any audio pot work here?

Build Reports / Glitchee - Corona #1
« on: March 22, 2020, 02:05:40 PM »
Glitchee made me think of Altered States for some reason.  Not sure why, haven't seen that movie in over 20 years.  Anyway, this circuit rocks. I started playing with it this morning and before I knew it an hour had past, which is fantastic under the current circumstances!


Build Reports / The Cutter - Runtime Error
« on: March 22, 2020, 01:46:47 PM »
I finished this one a few weeks back.  I really like this circuit, it sounds very unique, highly recommend giving it a try.

Build Reports / NomNom (Phase 90) and a JOYO look alike
« on: February 24, 2020, 01:05:07 PM »
I finished this NomNom awhile back.  Really like this pedal, it sounds great. 

I also have a Joyo Classic Phase, I got some years ago for ~$20 if I recall.  I decided to take it apart to see how the components compare.  Looks like pretty legit stuff.  Anyways, I thought it was interestingÖ...


General Questions / Rigol O-scope?
« on: February 19, 2020, 05:08:15 PM »
Anybody have an opinion about Rigol DS1102E O-scope?  I've had an old Techtronix 2235 for awhile now but last weekend it decided to catch on fire!  No joke, lots of smoke  :o

I'm looking on Offer-up and CL for something similar.  There's a few oldies on the cheap side, but I'm wondering if a newer digital would be better.   There's one used I'm looking at for slightly more than a used analog.


General Questions / Filter and Drive Dual Pedal Idea
« on: February 08, 2020, 02:24:01 PM »
I have a Flunkee (DOD FX-25 Envelope Filter) and a Runtime Error (Systech Overdrive) sitting in my queue.  Both are 1590A, which I'm not crazy about.  I was thinking of combining both circuits into one pedal.  Do you think these circuits would complement each other?  If so, what order is recommended or should I include an order selector switch?  Opinions welcome!

Build Reports / Lectric FX Ė Bloozehound (Boss BD-2)
« on: January 27, 2020, 03:32:35 PM »
Finished this one up, this weekend.  Deciding to move the power jack to the top turned out to be a big pain, lots of shoehorning required for that small adjustment.  I should have moved the instrument jacks lower. I also misjudged the height clearance requirement for Beanís new LED trimmer PCB.  I had to wire the trimmer in from the side.

For the graphics I was shooting for a late 80s skateboard look.  I really like the way it came out.  Enclosure is a polished 1590B with no film waterslide.

Hereís a dual 250KB that I converted to a dual 250KA, for the build.  Only burnt myself twice to do it!

Build Reports / PedalPCB Mini Heterodyne Receiver (EQD Data Corrupter)
« on: January 20, 2020, 03:43:02 PM »
Wanted to take a stab at SMD and chose this.  The build went really smooth, Iím excited to do some more SMD.  I bought the faceplate at PPCB, which looks super pro.  Was wondering if anyone knows of a good DIY way to make these?

Pedal is a really loud, noisy, and crazy, but that's intentional.  I think I might add a master volume, itís kind of tricky to get the three levels set.  Overall, really pleased with this one.

Open Discussion / Tayda Grey Box Caps??
« on: December 29, 2019, 01:17:26 AM »
Populating a board, and realized I don't have enough 82nF caps.  I do have a bag of Tayda 82nF caps, I bought a couple of years ago. 

The manufacturer, according to Tayda, is Acutronics, which I learned from the inter-web is Kemet.  Does anyone have experience/opinion of these caps?  They are battleship grey with few markings.

The pedal I'm building is an overdrive that I want to sound right. I'm might order some Topmay caps from Small Bear, but don't know these either. Opinions appreciated!

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