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I built it again successfully - I tried to put a switch in it (with only two positions, I used a DPDT) for what should be the normal and bright settings - I realized that the sound gets darker as you increase the value of that cap, so NO cap should be the bright position and the 1.2nF should be the normal.
Normal works great, but it whistles and hisses if there is no cap on the other setting. Also a 220pF cap doesn't cut all the hiss, I had to put a 470pF - obviously the difference between the two settings is more subtlile, not so strong, but again you can hear the difference. Used a TL072.

anyone have a pot mounted vero layout?

I just whipped this up. Not verified but I think it is all good.

awesome! i will give it a try sometime!

I built this and works, but question: When the level is off, it cuts the signal completely off.like a volume knob, as you turn it up volume increases with a fixed amount of distortion. This is how it reacts through a JTM45, non master amp. Is this correct??? This is the Vero I used.

Actually it was this Vero I did.

Yes that's how it should act. The gain is preset and the pot is essentially just a volume control. If you want to alter the gain to suit your own taste you could try experimenting with swapping out the 470k resistor, or maybe replacing it completely with another pot (or trimmer if you're happy keeping the controls internal).

I haven't built that layout yet so thanks for verifying it.

Cool, just making sure. It is a cool Marshallish tone for sure. Fun box.

Hi guys,

just made my first od!
Here are some problems and things I've tried that I hope will help someone:

I've put a 500k gain knob instead of the 470k resistor, but the pot seems to reduce the gain just at the and, when is near the 0.
By the way, I think I will remove the pot, and put back the resistor.

Another problem with the caps and the dpdt...I think it's work great with both caps, but I prefer the .0012uF cause it's seem more alive on the top end.
It's sure doesn't sound good when left without the cap, well...it doesn't sound! i think I'll remove the switch and leave the .0012uF.

Tried to increase the gain by replacing the 330k r4 with a 430k-470k but that made it almost a distortion pedal with a buzzy feel, so I'll try a 360-374k just to try to make it a hot rodded plexi in a box!

Tried the tl072 and don't liked it, feels a little bit dead on the top end, with slightly less gain too.

Could some one suggest me how to give a little "meat" to the sound? And please, if you think my veroboard project sucks, please let me know, I want to improve!

Thank you guys, now I'll search for a sho thread, just had a problem there too!

So how do you like the gain knob, did you use audio or lin taper. I got bored quick with the thing but for what it is its ok.

ezs wrote:So how do you like the gain knob, did you use audio or lin taper. I got bored quick with the thing but for what it is its ok.

Well, if you see my veroboard, you'll read it's a 500k linear. I think it's good to have a gain pot, but it's not good when it works like mine!!

By the way, I think this pedal need to have just the volume knob, the gain and tone are already on our guitars!

Hi, no one is noisy with this circuit? shhhhh? anyone know how to remove it? not a source problem, for me there is something wrong in the circuit.

A1full wrote:Hi, no one is noisy with this circuit? shhhhh? anyone know how to remove it? not a source problem, for me there is something wrong in the circuit.

sounds like a grounding problem.

Seiche wrote:

A1full wrote:Hi, no one is noisy with this circuit? shhhhh? anyone know how to remove it? not a source problem, for me there is something wrong in the circuit.

sounds like a grounding problem.

is made with the schematic of matsumin, I've tried everything! but I find no solution, you think of something? I put a capacitor at the input to further filter the source T rex fuel tank!
nothing worse .. also place a resistor 1m to in to ground anda nothing

A1full wrote:

Seiche wrote:

A1full wrote:Hi, no one is noisy with this circuit? shhhhh? anyone know how to remove it? not a source problem, for me there is something wrong in the circuit.

sounds like a grounding problem.

is made with the schematic of matsumin, I've tried everything! but I find no solution, you think of something? I put a capacitor at the input to further filter the source T rex fuel tank!
nothing worse .. also place a resistor 1m to in to ground anda nothing

did you do your own layout from the schematic? Did you ground the circuit to the enclosure?

Seiche wrote:

A1full wrote:

Seiche wrote:

A1full wrote:Hi, no one is noisy with this circuit? shhhhh? anyone know how to remove it? not a source problem, for me there is something wrong in the circuit.

sounds like a grounding problem.

is made with the schematic of matsumin, I've tried everything! but I find no solution, you think of something? I put a capacitor at the input to further filter the source T rex fuel tank!
nothing worse .. also place a resistor 1m to in to ground anda nothing

did you do your own layout from the schematic? Did you ground the circuit to the enclosure?

mine is not very well, so did all layouts I found, and all feel the same!
the strange thing is that nobody says, about the noise that has the circuit.

A1full wrote:

Seiche wrote:

A1full wrote:

Seiche wrote:

A1full wrote:Hi, no one is noisy with this circuit? shhhhh? anyone know how to remove it? not a source problem, for me there is something wrong in the circuit.

sounds like a grounding problem.

is made with the schematic of matsumin, I've tried everything! but I find no solution, you think of something? I put a capacitor at the input to further filter the source T rex fuel tank!
nothing worse .. also place a resistor 1m to in to ground anda nothing

did you do your own layout from the schematic? Did you ground the circuit to the enclosure?

mine is not very well, so did all layouts I found, and all feel the same!
the strange thing is that nobody says, about the noise that has the circuit.

there was some discussion about missing power filtering and how using a battery is advised on page 2 of this thread

Seiche wrote:

A1full wrote:

Seiche wrote:

A1full wrote:

Seiche wrote:

A1full wrote:Hi, no one is noisy with this circuit? shhhhh? anyone know how to remove it? not a source problem, for me there is something wrong in the circuit.

sounds like a grounding problem.

is made with the schematic of matsumin, I've tried everything! but I find no solution, you think of something? I put a capacitor at the input to further filter the source T rex fuel tank!
nothing worse .. also place a resistor 1m to in to ground anda nothing

did you do your own layout from the schematic? Did you ground the circuit to the enclosure?

mine is not very well, so did all layouts I found, and all feel the same!
the strange thing is that nobody says, about the noise that has the circuit.

there was some discussion about missing power filtering and how using a battery is advised on page 2 of this thread

But if the problem is not the power supply or battery, for me there is something wrong with the circuit that generates the noise! I did all the layouts that were posted and we have the Internet and all have the same problem, when you pass the potentiometer 9pm, and noise is annoying.
is a continuous shhhhh

Assuming the original Rust driver doesn't have this issue

1) what kind of resistors did you use in signal path? could this just be component noise? ie hissy resistor like R3 100k or R5 1k?

2)Have you put a filter cap in? the schem has a .006p from 9v. to ground.( put in a choke )

3) have you used shielded wire for input?

4) have you swapped out the IC? could be a noisy component?

for the Q's about gain pot did anybody else have the cut out problem? a good solution might be adding another switch for High low gain setting and just switch 2 resistors a dpdt stomp switch would be cool for that..

I just finished the vero board and will test it out in a shell in the next day or so. if this is gonna make my board I will have to filter as i won't run batteries anymore.. environmental and pocket book....

So buttoned it up and plugged it in. Nothing. Quickly debugged in cutting the vero board I had cut the ground trace jumpered it and lit it with a 4558d then a tl072Acn both little fizzy with a very timed fast roll on the distortion to be fair at this point i only had a .001 in the feedback. ..

I switched the cap to a .002 Plugged in a ls204 and big smiles..i will need to try this value with the other chips as it does pick up some hiss at louder volumes but this is at dead quiet. While playing its lost and on a pedal board with even the slightet gate you would never know.

I have .001 and .002uf switched not a big dif fence will play With this. I like the .002 better slightly rounder not flabby at all. I have lf353N s on the way will finalize this all next week.

I am going to add a gain pot. I need to figure out low and high resistor values. Will put low value in series with the pot and use a pot that closely fills out to a wide open value. This will keep the chip from shutting down as previous pot implementations had. I will post findings. Thanks to everyone involved especially iv1ark for the vero layout..... It is so very close at this point to the real rust driver unity gain hears to be at about 3 o'clock. Ther is way to much room boosting after that. I need to figure out a better pot and cap on the output to make the volume Knob more useful. It could be the opportunity to filter out the hiss as well... Do these projects ever end rofl....

All and all I think the rust driver is the best sounding plexi sound in a pedal I have played with to date. It is limited and basically a one trick pony but it is that sound you think of when you think of a plexi girding out. Reducing the guitar volume knob cleans it up a bit so I guess it's a 2 trick pony

Stay tuned and thanks again
A