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Ha ha guess I'll have to do that on mine too.

I guess expensive is a relative / personal judgement. For me I'm always disappointed that the enclosure dwarves the cost of the rest of the circuit.

Damn, that is one expensive enclosure.

Have you ever done a whole preamp at high voltage, like a JCM800 or Rectifier type thing? I'm curious if there's benefits in running at higher voltage? It seems to me the initial work on these FET circuits was done at 9v just because that's the "pedal voltage", not necessarily because it was...

When using a JFET/MOSFET you mean?

*Renamed the thread as it is primarily about FET designs. Hey folks, so I've been reading Merlin Blencowe's Designing Guitar Preamp book. One thing that has interested me is the effect of essentially a poor design leading to some current leaking into the grid of the follower and therefore...

What is the context for this? What is the circuit? Both things you're referencing here are transistors, not voltage regulators as I understand the term. Something like an LM78x for instance.

Did you ever see this @Chuck D. Bones? An interesting way to lower the Vf whilst maintaining the softness. https://www.freestompboxes.org/viewtopic.php?t=32532&sid=9f44ed4305fd2974e985312204732e2c

Apparently STM32 can be programmed via Arduino IDE too. https://community.st.com/t5/stm32-mcus/how-to-program-and-debug-the-stm32-using-the-arduino-ide/ta-p/608514

Has anyone here used an STM32 as a microcontroller for switching? The reason I ask is that JLC has a few as a basic part for assembly. Just wondering how easy it is to program. I'm guessing you would need pins on the pcb in order to flash the firmware onto it. ESP32 boards are cheap on...

This topology is super interesting. http://milas.spb.ru/~kmg/jcm800fetLnd150_en.html

They're disappointingly simple from what I've seen.

Would be curious to see the schem too. I recently went down the LND150 rabbit hole. I'm quite keen to experiment with them some times soon.

Yeah for me personally I would only be using this system line out. I guess my thinking is the reactive load will make the transformer and feedback network a little more amp like. I'm guessing the output power scales with the input? Or is that not how it works?

To be honest I think the bottom picture is basically the entire design? The only thing I can't figure out is where the signal exits the circuit? It's laid out in a funny way but it's basically a LTP into push pull. If we could modify it to use MOSFETS or power BJTs for the output to drive the...

I've been thinking about this a bit today. In order to simulate this could we not actually just make a ~0W power amp? We could even include an inductive load to sink a couple watts if necessary. JFET / BJT LTP Phase splitter, into MOSFET push pull output, into a transformer with negative...

I'm just getting into tube preamp designs, as in I did the ADHD thing of buying a bunch Russian Sub-mini tubes, whilst still reading about the basics ha ha. I'm hoping to get some insight into the power / voltage flow. In your (@vigilante398) Black Eye design, I see that C9 and C10 are high...

I have the F1 and I really like it. It does that ever so slightly crunchy clean super well and is a great pedal platform pre-amp.

This is the motley crew.

Hey folks, I tested a bunch of cheap transformers for use in pedal design. I won't replicate the post here, the full thing is over at GroupDIY. I think the Hammond 142 series one are the most interesting. Despite claiming a frequency response of 200 - 15khz they actually extended all the way...