GuitarPCB | Port Side Cris | Activity https://guitarpcb.com/members/port-side-cris/activity/ Activity feed for Port Side Cris. Mon, 04 May 2026 07:20:04 -0400 https://buddypress.org/?v= en-US 30 hourly 2 4c27562575e13c6e6029f8bf69323c43 Port Side Cris replied to the topic Muff'n V4 Troubleshooting (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/muffn-v4-troubleshooting/page/2/#post-38006 Sun, 07 Dec 2025 15:32:10 -0500 Welp good news! I cut the excess legs of the socketted components and flipped the orientation of the transistors like Billy said and I finally have a successful working muff’n. Thank you folks for all the assistance! I knew it had to be something silly. I apologize for the ignorance on here but I guess I learned a couple of things here.

]]> 0 a8d56e24301d49fe2ed237396b02d48f Port Side Cris replied to the topic Muff'n V4 Troubleshooting (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/muffn-v4-troubleshooting/#post-37998 Sat, 06 Dec 2025 13:12:08 -0500 Well now I’m confused because I just googled another datasheet for the BC549C and found that my pinout was correct? I guess it would help if I knew for sure who the manufacturer was. I’m not sure. What do you folks think? It would make sense that it’s oriented properly if sound at least passes through vs not at all if oriented the other way…Read more

]]> 0 564de95ee8b21cbe8f77b75ab0e37002 Port Side Cris replied to the topic Muff'n V4 Troubleshooting (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/muffn-v4-troubleshooting/#post-37997 Sat, 06 Dec 2025 13:01:40 -0500 Ok I messed this all up. I looked up the datasheet for the BC549C which is what I am using and the emitter voltages and collector voltages should be swapped in my readings. I apologize about that. So once more I have 9.38 volts going in;

Q1: C=7.98 volts B=0.59 volts E=0.03 volts

 

Q2: C=7.98 volts B=0.59 volts E=0.03 volts

 

Q3: C=7.59 volts…Read more

]]> 0 173c19168014d346816c6d89ab0fa038 Port Side Cris replied to the topic Muff'n V4 Troubleshooting (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/muffn-v4-troubleshooting/#post-37992 Fri, 05 Dec 2025 22:57:32 -0500 So after checking and writing down my voltages to the transistors I have gathered the following with 9.39 volts going in;

Q1: E=7.98 volts B=0.59 volts C=0.03 volts

Q2: E=7.98 volts B=0.59 volts C=0.03 volts

Q3: E=7.59 volts B=0.58 volts C=0.03 volts

Q4: E=8.23 volts B=0.76 volts C=0.2 volts

These seem to be a little high compared to what was…Read more

]]> 0 b6b3bcc208a879ec716837c1f8bbf86c Port Side Cris replied to the topic Muff'n V4 Troubleshooting (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/muffn-v4-troubleshooting/#post-37988 Fri, 05 Dec 2025 14:45:52 -0500 Thanks for the suggestions everyone! Yea unfortunately I have tried all of those things initially with no luck 😕 I did find that with the jumper installed where it currently is, there is now no voltage to D3 and D4 and I have voltage to D1 and D2. Originally I did not so that’s when I switched the jumper over. Still the same result unfortunately.…Read more

]]> 0 99125aeea4a9fc5b6ecc7b79b46a068d Port Side Cris replied to the topic Muff'n V4 Troubleshooting (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/muffn-v4-troubleshooting/#post-37984 Fri, 05 Dec 2025 09:35:10 -0500 I used the green Russian variant. Going off of the build doc and schematic it seemed D3 and D4 were optional and I opted not to use mod 6 in the build doc.

]]> 0 93007824b3d5a1dca39aa77b11418f0b Port Side Cris replied to the topic Muff'n V4 Troubleshooting (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/muffn-v4-troubleshooting/#post-37979 Thu, 04 Dec 2025 22:57:54 -0500 Thanks for the info! And I apologize in advance for the multiple photo posts. I couldn’t figure out how to get it all on one post. You will noticed I opted to use LEDs for the clipping diodes and I also decided to socket R18, R20, C10, and C11 referring to the schematic so that I could tweak around with the tone circuit in the future. Just for…Read more

]]> 0 5b6559b67c2b1fe5a6f66a6a8f7a4427 Port Side Cris replied to the topic Muff'n V4 Troubleshooting (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/muffn-v4-troubleshooting/#post-37978 Thu, 04 Dec 2025 22:54:24 -0500

]]> 0 25d6196aae692ccaabff5cff2c9d23a1 Port Side Cris replied to the topic Muff'n V4 Troubleshooting (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/muffn-v4-troubleshooting/#post-37977 Thu, 04 Dec 2025 22:54:03 -0500

]]> 0 23f571100b0fda446abe1acb56a954bc Port Side Cris replied to the topic Muff'n V4 Troubleshooting (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/muffn-v4-troubleshooting/#post-37976 Thu, 04 Dec 2025 22:53:42 -0500

]]> 0 73119b71b89499ae42f438936965e109 Port Side Cris replied to the topic Muff'n V4 Troubleshooting (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/muffn-v4-troubleshooting/#post-37975 Thu, 04 Dec 2025 22:53:19 -0500

]]> 0 2d14024108f63e04f2206845b8e91735 Port Side Cris replied to the topic Muff'n V4 Troubleshooting (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/muffn-v4-troubleshooting/#post-37974 Thu, 04 Dec 2025 22:52:53 -0500

 

]]> 0 0949b070b18263464866b2fe11855495 Port Side Cris started the topic Muff'n V4 Troubleshooting (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/muffn-v4-troubleshooting/ Thu, 04 Dec 2025 11:17:17 -0500 Hey everybody! New to the forum and new to pedal building. I was wondering if there were any voltage specs/check points available for the Muff’n V4. I built it up and it sounds likevthe worst overdrive you ever heard! About half the volume, little to no gain. I socketed the transistors and verified they were in proper orientation. I also made sure…Read more

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