DIY Gate

I did some searching on the site but couldnt find anything. Was wondering if anyone has designed a gate?

Thanks in advance.

http://www.groupdiy.com/index.php?topic=1640&highlight=diy+gate

:green:

just kidding

try this:

http://www.groupdiy.com/index.php?topic=366&highlight=diy+gate

it's not much but maybe we can change that.

LOL i knew that was going to happen. Cool thanks. I did a search and that didnt come up. Again thanks.

Waltzing Bear has the Kepex gate in under the misc section

http://www.waltzingbear.com/Schematics/Schematics.html

Gerry

I have a relatively simple homebrew FET-driven gate design with key filters. Could scan it, if there's any interest.

Jakob E.

Sure !!

scan away ... :thumb:

if there's any interest

Click to expand...

Interested!

/Anders

mee too!!

Here's what I found till now - the PCB layout:

http://groupdiy.twin-x.com/albums/userpics/10004/Gyraf_NoiseGate_Layout.PDF

I'll keep searching for the schematic..

This gate is based on a FET attenuator. It has key input -filters and -listen as well as hard bypass. Audio only passes FET and one 5534 - thus working unbalanced, but with very little sonic side-effects.

Controls are threshold-attack-hold-release-HPF-LPF-keylisten and bypass.

Action is indicated by a single red/green LED (that works pretty well, if I may say so..)

Jakob E.

Looks cool!

/Anders

wow! I was going to design a simple fet gate (without the SC). but now...since jakob did the work allready ...I can safe the time for something else :green:

thanx Jakob for sharing this!

steff

Thanks Jacob! I was just thinking about building some gates...

Great stuff. Keeps us posted on this. I was hoping i wasnt the only one looking for a noise gate.

Perfect Jakob! :thumb:

Thanks a lot!!! Hope you find the schematics.

Just womdering... anyone ever considered to do gates with solid state relays (MOS switches) or something like that ??

:sam:
Fabio

[quote author="Bauman"]
Just womdering... anyone ever considered to do gates with solid state relays (MOS switches) or something like that ??
[/quote]

No. Even though gates in-theory are on/off devices, you need to adjust their opening/closing times in order to use them for audio - which means that you need controlled gain, not simple on/off.

Jakob E.

A schematic of the Dsrawmer gate was posted some time ago
http://www.groupdiy.com/index.php?topic=2003&highlight=ds201

Actually, I have made a (eurocard) pcb for an unbalanced mono version of it for the purpose of testing and modifying - not knowing if the above circuit works... . It's nearly built but still untested. I will post results if there's interest...

Stephan

I must do the other pages - not much sunshine now though!
Stephen

No. Even though gates in-theory are on/off devices, you need to adjust their opening/closing times in order to use them for audio - which means that you need controlled gain, not simple on/off.

Click to expand...

I´m ok with this, but what about to use it to control the gain of and opamp
like the usual fet gate circuit , better than a fet for that?

Just curiosity here, not pretending to reinvent the wheel... :green:

:guinness:
Fabio

Here is a Fairchild Gate I've had for a while but have not had a chance to try out yet. The manual has a cool schematic (page 6) though I'm not sure about the availability of some of the parts.

http://www.lsfsound.com/public/fairchild/661tl_pg0.jpg
http://www.lsfsound.com/public/fairchild/661tl_pg1.jpg
http://www.lsfsound.com/public/fairchild/661tl_pg2.jpg
http://www.lsfsound.com/public/fairchild/661tl_pg3.jpg
http://www.lsfsound.com/public/fairchild/661tl_pg4.jpg
http://www.lsfsound.com/public/fairchild/661tl_pg5.jpg
http://www.lsfsound.com/public/fairchild/661tl_pg6.jpg
http://www.lsfsound.com/public/fairchild/661tl_pg7.jpg
http://www.lsfsound.com/public/fairchild/661tl_pg8.jpg
http://www.lsfsound.com/public/fairchild/661tl_pg9.jpg

Cheers
Kevin.

Some questions regarding the Fairchild gate... Does anyone see a problem if I just use a regulated DC supply (external) and tie it in across the outputs of the bridge? I suppose It may be simpler to just pop the diodes out, jumper across the right ones and use the connector.

6.3v? How critical is this do you think? I have a decent linear 5V supply that I'd like to use.


Thanks
Kevin.