DOD - 230 ( Noise Gate )

mikeh · Post by **mikeh** » 07 Oct 2009, 15:50

Does anyone know how I might go about modding this design to include a decay control? Or just how I might make the decay faster. I really only use a gate when I'm playing really high gain metal type stuff, and I like my gate decay really really fast. Like immediately.

floris · Post by **floris** » 07 Oct 2009, 16:00

LDRs are slow but different types have different decay times. So use an LDR that has a fast decay (turn-off time). For instance a VTL5C1 or VTL5C3 Vactrol (35ms to 100k).

mdaudet · Post by **mdaudet** » 15 Dec 2009, 06:11

Hi folks!

I've just made a PCB for this project, based on the "Foo Zen Gate" previously posted in this threat. Its not verified yet, but I'll be soon because I'll make it this week. I let you know about the results.

Remember the optocoupler. My pdf has the pads for the VTL5CXX. Experiment with faster couplers like VTL5C10, etc., or just make a cheap LDR-LED combo.

The project fits in a standard 1290 box. Above the 1uF capacitor from the left are the pads for the momentary switch, in case you want to perform this part. I guess a standard TBP would be ok, making useless the momentary. Feel free to experiment.

I've added a "pull down" resistor at the input in case you make this unit TBP.

Regards,

Matto Daudet
CHILE

mictester · Post by **mictester** » 15 Dec 2009, 16:39

mikeh wrote:Does anyone know how I might go about modding this design to include a decay control? Or just how I might make the decay faster. I really only use a gate when I'm playing really high gain metal type stuff, and I like my gate decay really really fast. Like immediately.

You're unlikely to get a simple gate to work much after a high-gain pedal! You have to drive the sidechain of the gate from before the high gain pedal, so that it's looking at the real envelope of the guitar!

floris · Post by **floris** » 15 Dec 2009, 17:11

Yes, a sidechain input would make it much more usable. Should be pretty simple: Extra input, buffer/booster, hook it into the "control" line.

mdaudet · Post by **mdaudet** » 15 Dec 2009, 22:23

For High gainers the Boss NS-2 is very good due to the "loop" of the pedal. Connect the noisy effects through the loop and rock it.

I own a NS-2 but now i'm selling it because some degradation of the sound, specially from ONE kind of distortion I own (custom by me, no clone). When I engaged the distortion there was a volume drop and a huge loss of middle frequencies. The NS-2 has very questionable impedance at its I/O. Never happened before but now with my new pedal, wich was made to satisfy my "mid" and "gain" needs. hehe

Thats because I was searching for a simple NOISE GATE, to eliminate some floor noise from OD and there combinations, plus I play a strat with SS.

I'll tell you soon about the DOD 230 Noise Gate, hope it works good as the schematic promises.

Regards,

Matto

rhandy gaye · Post by **rhandy gaye** » 10 Jan 2010, 08:00

i stole pics of ebay and noticed differences between clm50 and vtl5c2 versions.

on the vtl5c2 pins 6 and 7 of tl022 are not joined and have a 1meg resistor between them

and no 100ohm on power

probably makes no diff but anyways.

ps. trace side pic is reversed.

rhandy gaye · Post by **rhandy gaye** » 11 Jan 2010, 11:53

i drew this from scaling a couple of pics, so should be close but not exact to the original dod 230 board size.

some of the traces may not be exact (i've never fully seen a trace side pic) but they should go where they are meant to.

i'll post a components layout at some point soon but, for now it might be good practice for someone to try and reverse or work out from info already available.

rhandy gaye · Post by **rhandy gaye** » 11 Jan 2010, 12:50

p.s. i'll post a better quality pic to download too.

HEAD · Post by **HEAD** » 12 Jan 2010, 16:09

Hi rhandy,

I realy appreciate your work on it - so thanks at first!

Any news so far?

Cheers
Helge

rhandy gaye · Post by **rhandy gaye** » 12 Jan 2010, 21:00

hi, i should have it done in a day or two. i've got 3 daughters under the age of 2 and a half (2 are twins) which keep me very very busy.

cheers.

Scruffie · Post by **Scruffie** » 02 Feb 2010, 20:40

Sorry to ask again but has anyone got anywhere with any of these PCB layouts? My Dr Boogey could do with being silenced

.

Scruffie · Post by **Scruffie** » 16 Mar 2010, 17:07

Just had a board made up from Rhandy gayes layout... everything looks pretty much perfect and fits as it should, might be a tight squeeze in a 1590B though and the two top corners will need cutting across diagonally like on the original layout to push it up closer to the top of the box round the screw holes.

Other than that, awesome layout Rhandy, thanks for sharing it!

Scruffie · Post by **Scruffie** » 17 Mar 2010, 20:18

Badly made in Paint but I think this PCB Overlay is right for Rhandys layout...

rhandy gaye · Post by **rhandy gaye** » 17 Mar 2010, 23:24

looks good to me, i'll have a check again over some stuff later, screaming kids are calling.

snafuX · Post by **snafuX** » 31 Aug 2010, 23:01

hi!
just finished one using sruffie layout...well it works..... but i've a little question for you guyz
i've noticed that when the gate is open it affects the sound passing trought by increasing the gain of the signal
the consequence is that the signal isn't so much clean it's kinda boosted
used a tl2022 and the right 358 tried with a selfmade led - ldr that close quick
tried also with the vtl5c10 as specified but the problem is still
can someone tell me how is it possible.... was this pedal intended to boost the signal???
thanks a lot

Scruffie · Post by **Scruffie** » 01 Sep 2010, 00:38

snafuX wrote:hi!
just finished one using sruffie layout...well it works..... but i've a little question for you guyz
i've noticed that when the gate is open it affects the sound passing trought by increasing the gain of the signal
the consequence is that the signal isn't so much clean it's kinda boosted
used a tl2022 and the right 358 tried with a selfmade led - ldr that close quick
tried also with the vtl5c10 as specified but the problem is still
can someone tell me how is it possible.... was this pedal intended to boost the signal???
thanks a lot

Just to mention, that it's not my Layout, rather Rhandys, I just made the overlay for it.

There is a cap missing on the Drawing I did, did you put it in? Right after the Input.

Could it be making the Pedal True Bypass has caused this I wonder... just like some pedals suffer volume loss maybe this doesn't like it, could try wiring it like the original.

You definitley used the right resistors as I put no band indication on the drawing to show which direction to read them.

Just throwing ideas out there.

snafuX · Post by **snafuX** » 01 Sep 2010, 10:24

yes the cap is the 10nf isn't it?
yes there is a 10nf after the input.
maybe a 1m pull down in input could work as well??
do you thing it's right to put the cap in or not???
i'll also try to wire it as the original as soon
i hope it'll work well because is one of the best gate i've ever had

floris · Post by **floris** » 01 Sep 2010, 13:20

snafuX wrote:... was this pedal intended to boost the signal?

Refering to schematic:

If you make the 22k gain resistor smaller (U1A between pin 1 and 2), the gain will decrease. This way, you can get rid of the signal boost.

soundclone · Post by **soundclone** » 16 Nov 2010, 07:05

can i use Tl072 instead Tl022?