Recent content by TucsonSean

I'm using a Taig cnc mill. I can start a new thread for the CNC. My current design IS a flyback UC3843 based design. The xfmr has been an interesting one. I have a couple of versions using a couple of OTS xfmrs and a couple that are custom wound using EF20/ETD20 and ETD29 cores. Hoping one of...

Noted. Thank you. MOD: can you move this to the proper forum? Pic of the PCB fresh off the mill. Hoping to fully populate it tomorrow. A side note: vigilante398, I will be using your HV daughter board to power this prototype. I am still working on my HVPS design and hope to finish it soon...

Hello Everyone, So, I didn't know if I am putting this in the right location but if not, please let me know where it needs to be moved to. I have been working on a various different preamp pedals for the last several years and I have finally moved forward on one design that I have been kicking...

ragamuffin, I have not tried the Plexifeta as an overdrive pedal into the front of another amp as I am using it as part of an ampless rig. In my case, it works extremely well, plus I have the option to use a Source Audio EQ2 after it if I need more tonal shaping than it has and my HX Stomp can...

Since building the Particle Accelerator, I decided that a tube overdrive would be a great addition and built a King Nothing as well. The only issue I encountered is that the input distorts too easily as I use active pickups. So, I decided to make a couple of changes to the input stage of the...

No, your not missing anything obvious. In these types of cases, you always double check values to make sure that you didn't install the wrong value component on the board. I also checked to see if Coilcraft is the only manufacturer to label 100uH as 104. MuRata also uses 104 to denote 100uH...

Quick question, did you ensure that your inductor is 100uH (101 marking is typical)? Your pics show 104 (100mH). Big difference if that is the case and maybe a source of your oscillation?

This is a mod I made to my General Tso so I could run it at 18V to try and eliminate the issue I was having which I described in my earlier post. I had to roll my own board as PPCB doesn't offer an intelligent or basic relay switcher and charge pump on the same board and I didn't have any spare...

Q1/J113 would not need re-biased as it is a follower. Any suitable JFET with a large enough VgsOff should work in that position. As for the op amp, I could select another but I would have to order some other alternatives and at this point, I have enough op amps laying around as it is. Anyone...

I noticed a slight distortion sound when I was playing and I determined that it was from the level hitting the input to the pedal. I run active pickups and have looked at the output on an oscilloscope and saw peaks greater than 2V. I know that the input common mode range of the OPA1656 is power...

Hello Everyone, I've got a question on the General Tso. What changes need to be made to run the Tso on 18V? I know that the LED current limiting resistor (R100) and the current limiting resistors for the LDRs (R23 and R25) need to be increased to ensure they do not let the magic smoke out...

Robert, Any update on the toggle breakout boards for the Salesman? Thanks. -Sean

Awesome Job Feral Feline! One other bit of information, I ended up changing C8 to see what the effect would be and with it and the C11 change, it may have that top-end sizzle that you want, in excess. I don't know if you need to make any of the changes in the diff-pair/output stage of the...

Hi tegendemuur, My typical tweaks involve putting in sockets for various components so I can swap out different components. Any build that i do that has a transistor (BJT, JFET, etc...) I almost always put in a socket so I can change it out easily for a different one or replace if needed. I do...

@DeadAirMD, yes, this schematic was for modding the DVP4 but I don't see a reason why it wouldn't work for the DVP5. Same requirements apply if you want to add a toe switch. -Sean