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Re: Dod - FX30 ( Noise Gate )

PostPosted: 12 Dec 2012, 01:32
by mozwell
dod 230 & fx30b sch

Re: Dod - FX30 ( Noise Gate )

PostPosted: 30 Jul 2013, 18:34
by elkulon
Thanx, again!

Re: Dod - FX30 ( Noise Gate )

PostPosted: 03 Dec 2013, 18:30
by dromilious
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.

Re: Dod - FX30 ( Noise Gate )

PostPosted: 05 Dec 2013, 16:23
by elkulon
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...

Re: DOD - FX30 Noise Gate

PostPosted: 01 Jul 2019, 22:26
by pervyinthepark
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?

Re: DOD - FX30 Noise Gate

PostPosted: 01 Jul 2019, 22:39
by Fender3D
Who the hell is Andy?

Re: DOD - FX30 Noise Gate

PostPosted: 13 Jul 2019, 08:40
by pervyinthepark