Have you had a look at the tracing blog with pics? Looks like the guy was pretty thorough, I trust the results. If you look really hard at the pics you can just make out that one IC is a national semiconductor TL071CN (at least I think so). In terms of diodes, I was in a bit of a rush when I was mak...

updated - it works, but I did have mistake in the previous vero, with pins 1 & 2 of hi cut being joined

I also ran a separate power supply to the collector on the buffer in the end, but this version should be fine.

Well it was either do this or clean up the back yard in 34 degree heat (that's 93 for you foreign folks) Unverified, will probably build over the weekend. I didn't add VC as it seemed a little OTT, you could squeeze it on another row if you really wanted it. Thanks for the trace aionios :thumbsup

Ben N wrote:

andy-h-h wrote:Anyone familiar with Monty Python’s argument clinic??? Seems appropriate
https://youtu.be/ohDB5gbtaEQ

Does not.

Oh yes it is.

Anyone familiar with Monty Python’s argument clinic??? Seems appropriate

This is getting derailed. I just wanted to see the schematic :cry: Yep - bring on the schematic. [smilie=a_biggrin.gif] [smilie=a_biggrin.gif] this is all too serious for my liking. Poor old Pete Cornish - I hope he never swings by here to read the trash talk he cops. But then why would he? He's pr...

Any suggestions as to what capacitors should be used to get the same response using a 1M pot instead of 2M or a dual 1M?

Thanks.

Well its the only schematic in this thread. All the Layouts somehow have A10k Its an error right, not a version? I'm not sure if it's an error or a version. I just know that I've seen a lot more with 10k than I have with 250k. Just message Johnk and ask him. Check out this thread at GFX http://guit...

Updated to suit. Thanks Mr Benson, you didn't need to be so kind as to add that missing information. Many others wouldn't and haven't...

i drew up a schematic for my 9V version today. it's the one with the trimpot for the high gain. [ Image ] So I'm confused :scratch: Every layout I see has a A10K for the low-cut potentiometer, yet JohnK's schematic has a A250K, and no one mentions the pot values here. Which one is correct? 10K. Mos...

Here's a few options to play with. Thanks for tracing this, much appreciated.

all in all,a tweaked plexi drive from Wampler. The power of hype. Heh that would be amazing considering I hadn’t even consciously heard of that pedal before this thread. I do agree that the circuit similarities are striking. Turns out there are only so many ways to make an amp in a box? To be fair,...

I just built this - the fuzz doesn't have much variation, and the tone controls are super touchy. Have only tested on the scope / spectrum analyser as it's a little late for fun with the amp. Not sure about this one. Seems to like 18v more than 9v

I've never seen a Pete C pedal use an opamp buffer, P2/G2/SS2 etc. all use the standard bootstrapped fet buffer, going well back into examples from the early 90's (the Guild Brian May Box etc.). But you never know I suppose. That's a very good point. I might have to try building a PNP version now.

I've seen that pic too. The third board with the IC might be another buffer, or possibly even a power inverter to run PNP transistors. I think a buffer is way more likely, but you never know.... The blue cap is a link to ground. You can find more details on this by looking at the G2 schematic, as it...

Should look something like this. It is possible to trim this down a couple of rows too if you want to move a few things around, and the 100uf cap is optional, as is the power diode, as you could just take power from the Cornish Buffer layout that IvIark has nicely provided on guitar effects layouts....

EXTERNAL BIAS POT I ended up using a 4.7k resistor with a 25k pot for the external bias. Gave a nice range. Works well on the board I made which is using germanium transistors for Q 4 & 5. Naturally the bias range will be transistor dependant. So resistor from the junction of Q4 collector and Q5...

Hello, Bias by ear as there are no reference voltages available (at least none that I know of) + personal taste will come into play when doing this. When biasing on the bench with a scope/FFT, I found it easiest to bias with the sustain and drive at lower settings first, and then check again with hi...

Hey PaleIight,

I've worked it out in my head and have a modified layout ready to try. Will let you know what I end up with after I've tested it properley. Resistors will no doubt vary depending on transistors used in the last stage.

Ok, thanks, I was thinking that the most convenient thing to do is to make the bias asjust with a pot, and put it in the outside with de others controls like in the ng3 version...any posible cons to it? More noise? Its something that I always think, that using a pot instead of a good metal resistor...