@barry
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Wow, OK. That was some typo.
Several conflicting reports and I should have looked closer at the symbol and not just the text above it.
I got it sorted now and thanks for pointing it out. It is a TL071 and not TL072.
I have updated the Build Document.
Wow, OK. That was some typo.
Several conflicting reports and I should have looked closer at the symbol and not just the text above it.
I got it sorted now and thanks for pointing it out. It is a TL071 and not TL072.
I have updated the Build Document.
Alternatively, to the AmpEQ sitting in front of the main amplifier preamp (guitar -> AmpEQ -> guitar amp input), which creates a subtle overdrive perfect for a classic Stones, Faces, or Black Crowes tone you can try using the amplifier effects loop.
For your suggested “Sculptor” setup, I encourage builders to create a dual pedal combining the Sonic Bloom and AmpEQ, then run this dual pedal directly in the amplifier’s effects loop to completely bypass the preamp. This provides massive EQ and tone enhancement without creating any unwanted clipping, allowing gigging musicians to make fast EQ adjustments for different venues.
Both implementations work extremely well but I wanted to mention the effects loop option for that reason.
“Barry, what hfe range were you aiming towards with the 2n3903?
Looking forward to this one and the Citrus amp boards, bet they are going to make a great 2 in 1 build.”anything from 130 to 160 should be fine. 135 is what I would shoot for but no need to cork sniff it.
It’s nearly impossible to get that low with 2N3904 so that is why the suggested 2N3903. Otherwise they are identical.
In the meantime I would take some time and carefully clean up the bottom 6-pin connector pads on the reverb side of the board.
I’d use a good Soldapullt-style solder sucker first, then follow up with some copper desoldering braid to remove as much solder from the holes as possible. Just be careful not to apply too much heat or linger too long, as you don’t want to lift or damage the pads.
Once the holes are cleaned out, I’d use individual wires instead of another ribbon cable. Insert each wire from the component side until the PVC insulation is flush against the board, then solder it from the opposite side and trim the excess just like you would a component lead. This helps prevent stray wire strands that could cause a short. Even if the holes aren’t completely cleared, individual wires are much easier to install one at a time than trying to force a new ribbon cable through.
Also if you bend Reverb brick leads to gain easier access be sure to reflow them all after bending it back.
It will not work with it like that above.
Also I was going to say that you need to make sure you have a power supply providing at least 100mA of current or it won’t work.
At a glance I cannot make out IC6 well enough to confirm the correct orientation.
The other thing I would check is that all voltage regulators are firmly seated since sockets can create intermittent contact. You can make a few minor back and forth bends in the leads to assure they are secure in the sockets. Also tell us what brand of L78L05 that you used for all three.
I would also set all three volume trimmers to their center positions.
Hopefully Billy can spot something.
Yes, I understand what you are referring to. My point was only that the scratch is very unlikely to be the source of the problem. As Billy pointed out, the power trace runs underneath that area, so it is not affected by the scratch.
The white line at the top is just a decorative silkscreen border. I cannot say if you may have created a ground island though just below that (honestly I doubt it since the center pad has connections on either side of the scratch). I can’t tell how bad it is from your photo but you will be able to see that much better in person.
I would do a full re-flow as a cold solder joint is the number one offender in most forum posts.
Here is a complete build with gut shot to check against yours which can sometimes be helpful.
I have not personally tested any clear coats on the panels, so I can’t recommend one over the other.
I would suggest testing on a small area first, as acetone can potentially affect the printed silkscreen ink or finish.
I would like to hear your results though.
I wanted to give you a behind-the-scenes look at something I’m especially excited about. This is FrontStage, a new NostalgiTone project currently taking shape. While it’s designed to stand on its own, the real magic happens when it’s paired with DumbleTone in a future Dual Combo. With onboard order switching, you’ll be able to place either stage first and discover ways to use this previously unavailable.
One design feature I’m incorporating is SMD pads for the JFET, making it easier to support both through-hole parts and modern SMD replacements as component availability changes over time.
I hope you enjoy these occasional behind-the-scenes previews as much as I enjoy creating them. There are many others waiting.
As always, thank you for supporting GuitarPCB. Every order helps fund the development of new projects like this one, and I truly appreciate it.
