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So recently I noticed that the TI TL072 opamps have doubled their previous noise specs from 18nV/sqrt Hz to 37nV / sqrt Hz. Not so good anymore. I'm interesting in alternative PDIP style opamps that exceed the noise specs of the current TL072 for future use. I am aware of NE5532s but they are...

Any recommendations for SMD mosfets for analog signal switching? My understanding is that larger threshold voltages are preferred for more swing without risk of inadvertantly toggling states. Is this correct? Any thoughts appreciated.

Built a pedal around Electric Druid's STOMPLFO only to check website and see that they are not shipping to the states due to tariffs. I don't know how long ago that decision was made but I know there was a recent ruling that the tariffs are illegal. Is it a safe bet to order from them now? Is...

Bout to vent... I've been troubleshooting a pt2399 delay with a big muff tonestack. Custom build. The blend does not go 100% wet despite it being a pot to pan between dry and wet signal. The pot measures continuity across rotation. There is a volume control directly coupled after. Then the...

Hi, Have a design where the gain product of the drive and volume control can introduce oscillations. I'm looking at trading post clipping volume for pre clipping gain. I am wondering, what output level is considered weak for a pedal? I usually shoot for for full swing so 3.5-4Vpk but if I had...

I've been chipping away at a bass AIB solution but I am finding that the desired post drive EQ curve changes with drive settings. I'm experimenting with boosting tube-screamer style in front which helps but then there is a hi-mid nasal quality. Do you find that overdrive structure affects...

Planning on working with the CD4044BE NAND gate IC. https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fcd4043b Not having an easy time interpreting the datasheet rn. I'd like to drive an red LED with the output. Does the IC have...

Sorry if this is a rehashed topic... But I've been thinking about building a fuzz and wondered: what are the Big Muff flavors? I know there's the standard BJTs with diode feedback and the BM tonestack as well as opamp versions and ones that remove the mid scoop. What else? In your opinion what...

Excuse me if I'm preaching to the choir but it occurs to me that many FV-1 builds distinguish themselves through off board programs on the EPROM. Why not socket that part and swap EEPROMs to cycle programs? Like stupid easy way to get all the sounds. Right?

Hello, I've been working on a design where I'd like to use a pair of hard clipping antiparallel diodes to ground to form a "clamp" circuit (limit peak voltage swings). Given the limitation I've placed on myself to not use excessive buffers/active stages, I'm trying squeeze them in with a...

Hello, I am working on designing my first PCB with PCBmount pots (was originally wiring offboard panelmount). I would like to know any tips or precautions people have when working with PCBmount? In particular, I am curious if I mix PCBmount pots with solder lug switches, will there be vertical...

Hello, I am working on a pedal right now where I am troubleshooting 60 cycle hum when my hand touches the guitar strings and the other hand touches a ground surface. So in short, I think there is a ground loop forming at the input of my pedal. My input section is shown below. I have seen...

It has recently come to my attention that the Common Mode Input voltage range of many opamp (especially TL07xs) substantially limits the voltage swing. https://www.ti.com/lit/ds/symlink/tl072.pdf?ts=1721265968534&ref_url=https%253A%252F%252Fwww.mouser.com%252F http://fpgacpu.ca/bass/bdi21.html...