DOD - FX30 Noise Gate  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.

Re: Dod - FX30 ( Noise Gate )

Postby mozwell » 12 Dec 2012, 01:32

dod 230 & fx30b sch
You do not have the required permissions to view the files attached to this post.
mozwell
Breadboard Brother
 
Posts: 112
Joined: 12 Mar 2009, 00:01
Location: Melbourne, Australia
Has thanked: 22 times
Have thanks: 69 times

Re: Dod - FX30 ( Noise Gate )

Postby elkulon » 30 Jul 2013, 18:34

Thanx, again!
elkulon
Breadboard Brother
 
Posts: 60
Joined: 04 Feb 2012, 20:22
Has thanked: 17 times
Have thanks: 3 times

Re: Dod - FX30 ( Noise Gate )

Postby dromilious » 03 Dec 2013, 18:30

Hello there!
I am working on a FX30 and i have some issues.
First of all i replaced the 500KB pot with a 500KA and i think it works better.
The main problem is that i have a volume and tone loss when i engage the pedal.
I use 2 LM358 dual op amps and a 2n7000 replaced the j113.I tried and a BS170 but i think the volume loss is bigger.
What do you suggest to do ?Thanks.
dromilious
 
Posts: 25
Joined: 02 Jun 2011, 11:37
Has thanked: 0 time
Have thanks: 1 time

Re: Dod - FX30 ( Noise Gate )

Postby elkulon » 05 Dec 2013, 16:23

There shouldnt be signal loss, even though you have some kind of filtering issue...
I'd take a look in the ICs, first.

About the transistor...
    J113 > Switch JFET
    2N7000 > MOSFET Enhancement

Besides the function, I'd asume you looked over the pinout... Didn't you???
And besides the function and pinout, I'd asume you spent time reading the datasheet of both of them, looking differences/similarities... Didn't you???

You should take a look in the FET orientation, because it is not clear in that scheme which are Drain and Source pins, and the other scheme has no FET...
elkulon
Breadboard Brother
 
Posts: 60
Joined: 04 Feb 2012, 20:22
Has thanked: 17 times
Have thanks: 3 times

Re: DOD - FX30 Noise Gate

Postby pervyinthepark » 01 Jul 2019, 22:26

Why does the schematic call for CD4007 (dual complimentary pair + inverter) and the layout by Andy calls for merely a 1n4007? I just tried building it by request using the CD4007 following the FX30 schematic 100%.

The layout and the schematic are different.

For example: Q1, the 2n5089, in the schematic, connects to a 10k which connects to an unlabeled diode to ground at C, then to power, and at B, a 100K to 1n4148 and the CD4007.
In the layout, Q1 at C connects to a 47k resistor to power (no diode in line), and then to a 1n4148, which connects to the Threshold knob.

The Q2 is also setup differently.

These are totally different layouts and schematics.

Which has been tested?
pervyinthepark
Breadboard Brother
 
Posts: 57
Joined: 25 Sep 2015, 19:40
Has thanked: 7 times
Have thanks: 5 times

Re: DOD - FX30 Noise Gate

Postby Fender3D » 01 Jul 2019, 22:39

Who the hell is Andy?
User avatar
Fender3D
Cap Cooler
 
Posts: 515
Joined: 08 Aug 2009, 03:40
Location: Helltaly
Has thanked: 102 times
Have thanks: 137 times

Re: DOD - FX30 Noise Gate

Postby pervyinthepark » 13 Jul 2019, 08:40

pervyinthepark
Breadboard Brother
 
Posts: 57
Joined: 25 Sep 2015, 19:40
Has thanked: 7 times
Have thanks: 5 times

Previous

Return to Modern Stompbox Effects (1975 - ...)

Who is online

Users browsing this forum: Gunte and 8 guests