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DIY Stompboxes => Building your own stompbox => Topic started by: peps1 on April 14, 2010, 06:50:28 PM

Title: MXR Noise Gate 150K (Ra) ???
Post by: peps1 on April 14, 2010, 06:50:28 PM
ummmmmm (Ra) ? :icon_confused:

(http://i55.photobucket.com/albums/g146/icecreamterror/tonepad_mxrnoisegate2_unlocked_u-1.png)
Title: Re: MXR Noise Gate 150K (Ra) ???
Post by: peps1 on April 14, 2010, 10:32:54 PM
ETA: I take it that along with the 150k Ra resistor, the other two orange components (2m2 resistor/47pu cap) that are not on the parts list can be omitted.........Do i use a jumper in there place? 
Title: Re: MXR Noise Gate 150K (Ra) ???
Post by: anchovie on April 15, 2010, 12:18:31 PM
If you look at the whole PDF at Tonepad which that layout has been clipped from, you'll see Ra mentioned in the Notes section.
Title: Re: MXR Noise Gate 150K (Ra) ???
Post by: peps1 on April 15, 2010, 12:59:45 PM
QuoteLower Ra's value to allow faster than stock release.

That really dose not help :icon_rolleyes:
Title: Re: MXR Noise Gate 150K (Ra) ???
Post by: MikeH on April 15, 2010, 01:53:32 PM
Ra is adjustable.  You adjust it to where you want it.
Title: Re: MXR Noise Gate 150K (Ra) ???
Post by: Kinetic on April 15, 2010, 02:00:22 PM
If you want to build the stock version, I would use a 150k for Ra.  I would keep the 2.2M resistor (I think that will help prevent popping) and I would leave the 4.7pF capacitor out and you don't need to replace it with a jumper.

If you want to speed up the effect release, substitute a lower value resistor for Ra.
Title: Re: MXR Noise Gate 150K (Ra) ???
Post by: peps1 on April 15, 2010, 04:22:24 PM
Thanks guys  :)
Title: Re: MXR Noise Gate 150K (Ra) ???
Post by: JUANSNEIDER on September 15, 2010, 02:35:15 AM
HI. FIRST, SORRY FOR MY ENGLISH, HABLO ES ESPAÑOL MEN, BUT I WANT HELP YOU, JUST TODAY I FINISHED THIS PROJECT, TONEPAD FILES HAVE SOME ERRORS, BUT LOOKIN' ON THE WEB I FOUND THE SOLUTION..... AND MY NOISE GATE IT'S OK, WORKS VERY WELL. READ THAT (I FOUND THIS AFTER 6 MONTHS WITH MY NG IN THE CLOSET JEJE)....
All schematics on the web concerning the MXR Noisegate are wrong including the one from tonepad.
Referring to version 2 from 2003 (which I have on my HD):

- Input cap is in reality 10n (0.03) input resistor 10k.
- The 10µ electrolytic between the 22k and the FET is drawn in the wrong direction -
  positive should be on the Fet-side.
- Output cap is 10µ instead of 1µ.
- the capacitor before Q2 in parallel to the 100k is a 10n (0.03) instead of a 1µ.

The source of the FET is connected to U/2 and the drain to the 10µ electrolytic THIS IS THE PART THAT I NEVER UNDERSTAND BUT THE OTHER CAN REPAIR MY PEDAL....    AAAAAAAHHHH!!!! I USE 2N2222A NPN TRANSISTORS AND A 2N5640 FET FROM MOTOROLA (ECG CODE 133 OR SOME ELSE).
IF SOMEBODY HAVE SOME QUESTION MY MAIL IS JUANSNEIDER@HOTMAIL.COM.

P.D. THE TONEPAD FILE IS THE "ORIGINAL" WITHOUT MODS (REV. 2, 11/19/2003), I DON'T THINK THAT THE MODS WORKS IN THIS PROJETC
Title: Re: MXR Noise Gate 150K (Ra) ???
Post by: Bullet79 on September 15, 2010, 06:37:25 AM
agree with the dude... done it before .. not work.. end up buying Boss NS-2.. but still not make me happy... it sucks the delay even in loop...
but if you build all ur diy pedal properly,sheilded plus with a good cable and enough power to run them, it wont be noisy...

i run my pedal with 2 power supply, one for gain stuff and the other for color stuff... ;)
Title: Re: MXR Noise Gate 150K (Ra) ???
Post by: MartinGNR on September 24, 2010, 01:19:03 PM
Hi sorry for my english( i'm from argentina) ... Can somebody upload a video or an audio of this pedal working ?? I need a noise gate and it is the easier schematic that I found but I want to see how it works please.
Title: Re: MXR Noise Gate 150K (Ra) ???
Post by: DimebuGG on September 24, 2010, 11:26:53 PM
Using 2SK30-A JFET works very well on this circuit. Try it!. You have to twist the leads though because it has a different pin assignment.

Quote from: JUANSNEIDER on September 15, 2010, 02:35:15 AM
- Input cap is in reality 10n (0.03)...
- the capacitor before Q2 in parallel to the 100k is a 10n (0.03)..
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