Purple Plexi 800 by Mark

[Lobbetto]

Hello guys!

I built the layout of Mark "purple plexi 800" but I have a problem with the gain.

Let me explain, when I closed the gain throughout the volume is acceptable, but if you increase the gain as a result the volume decreases, and when I opened the completely gain the volume is very low.
The pedal functions as it should if it were not for this inconvenience.

How can I fix?
Thank you! if you need help I can also write voltages of the IC

1) 1,285            8) 1,285
2) 0,00              7) 3,81
3) 0,16              6) 7,80
4) 0,00              5) 5,58

Sorry, I did not know exactly where to post and I posted in 2 different sections.
If you feel you should be clear in one of the two.

[Synsound]

Go over your board a few times. I'm pretty sure there is a mistake. The only issue you should notice is a bit of noise at the last bit of the gain knob travel to max. That prob can be solved with a inline resistor.

[Lobbetto]

In the last piece of the journey gain knob to the maximum, the volume is greatly reduced . the only mistake is this.
There are no " bridges " between the tracks . and the welds are good .
I tried 4 different IC , with the same result

[induction]

Time for pictures.

[Lobbetto]

I may have found the problem, I will check in the morning tomorrow.

One wrong cut, the last strip, between Gain3 and Vol3.

I am almost sure that the problem is this.

[ξεναγος νεκροπολης]

yes you got it!
that's it. that first and last strip of vero plates is always bigger than the rest and the drill can't make the whole cut. i always use a razor to fix those cuts.

[Lobbetto]

tested and works perfectly now!
When I add the led for 3PDT I should have a difference in the sound right?
 I add that I used JRC386D but also try LM386-N1 to figure out which has the best results, but I have to say that JRC is not bad!

[IvIark]

No the LED doesn't effect the circuit audibly, it just gives you indication when it's on.
Try a few different ICs and just stick with the one you like best.  I find I often have my own favourites and use something different to what was in the original.

[Lobbetto]

Thanks Mark for your layout, you're great and thanks for the tips to all you guys! Next week I will build your layout for 7theven.

[Lobbetto]

I tried LM386N-1 and the sound I like!
I have a problem with the squeel in the last part of the gain, when I have the volume and gain maximum.
If I have the volume at 3 o'clock and the maximum gain, the squeel disappears, reappears as I raise the volume.
In a nutshell I can hold a maximum or gain or volume, but not both.
But I must admit, that perhaps might be normal to have the squell with those extreme settings .....

The JRC does not produce any noise, but seems to have a little less gain and less bass.
 
Synsound spoke of a series resistor to add.
I could try to solve the problem I have with LM386N-1 well.
If you tell me where it needs to be added and value.

Thanks to all

[Lobbetto]

Just to share my experience, I decided to leave the JRC.

a brief taste with a clip.
https://soundcloud.com/roby-guitar/test-plexi800-con-tbx30r
AMP IBANEZ TBX30R SETTINGS:
EQ FLAT
CLEAN CHANNEL
GAIN 5
VOLUME 0.5 (LOL)