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Hi, Hey and Hello. I’ve build a few Mini Me’s in my time, it’s my go-to Chorus. This time I am noticing a boost in volume that was never an issue. Is this a thing? Maybe I used a wrong component value somewhere? I’m digging into the schematic a bit to see if I can spot a boost stage? A gain stage? Thoughts?…
Robert – double-check the values of R4 (33K) and R19 (33K). If they are higher than the designated 33K, that could result in a hotter output. The Mini-Me should be a unity-gain circuit.
My Man. Thank you. Will do. I have it in a combo build right after a Boogie 57 circuit, which surprisingly is a little held back in it’s output compared to the boost I’m getting from the Chorus. I’m about to swap out with another project that has this circuit to see if it’s just a circumstance of being in this particular combo box… But will def check on those resistors. Thanks!!!
And if the resistors are already 33k as they should be…. Perhaps I can increase that value a little and see what happens? I have 2 out of 3 mini me’s that boost the signal.
Well I thought I could edit my replies, guess I can only add to… Turns out the 1 good chorus circuit is actually a lil analog chorus from BYOC. The 2 that boost the signal are both Mini Me.
In a combo build, all bets are off without first isolating the Mini-Me and testing it by itself. There’s an old adage: “A picture is worth a thousand words.” I’m down to about 122 left for the day.
Also, to which version of the Mini-Me are you referring? They’re the same schematic, but different layout and options.
The mini me was tested before combining in a multi box, But never did notice the volume boost. I’ll examine each component value tomorrow.
I see that Barry chimed in somewhere but can’t find his thread. He suggests that perhaps there was a parts bag with a wrong value, which sure does happen. I’ll be sure to check over carefully. I assembled 3 or 4 at a time, so we shall see what is found. Thanks all
I just had another thought…. How many versions might there be out there? How do I know if I have the old one or the New one. I know it’s a new one… It takes both chips, has the pads for the jumpers to accommodate either IC. But I see there may be multiple versions of the new version. Some build guides are in red, the newer one is in green. I’ll be investigating and comparing. I’ll check both build docs. Thanks…
Yes. I have 2 sets of build guides for the newer style pcb. They both have 34 resistors, but different values are in place for some. Now how do I know what pcb I have based on looking at it? I will obviously compare to the schematic and trace out my path. I’ll know within the first few components, just asking…
I included the pic with and without flash only after going through all resistors. They all match what they should be as far as I see. I will check the caps as well…
Shouldn’t be a major thing, but I see a discrepancy with C8. The parts list has it at 2n2 but the schematic has a 2n7. My builds have a 2n2 there.
Aside from that C8 2n2 vs 2n7, I found no mismatches or discrepancies. I have another one here populated and ready to go… Will test it now to see if it boosts as well…. And guess what. Sounds great. I used a dB meter app on my phone and the boost is minimal. 3dB max. Nominal. I plugged in the pedal that started my investigation and it was perfect. No major boost as I saw over the weekend. I am sorry to have brought this here just to be what is my mistake in my playback? I am at work going through a 15 watt Marshall combo amp and it sounds great. At home going direct from the pedal into a ZOOM H6 recorder was taking me from -16dB on the digital channel meter into the red. That’s not happening here. I’m curious as to why and will have to check the amp schematics. Perhaps some buffer or onboard compression? Will see. Thank you, and I’m trying to not be so quick to post on the problem forum. Thanks!!!
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