Bump....I just bough this for $20. Its my first pedal and I like it so if I could actually USE this to bring the funk a bit more it would be awesome!
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DOD FX25-B Modification
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Bump....I just bough this for $20. Its my first pedal and I like it so if I could actually USE this to bring the funk a bit more it would be awesome!
Okay, I did the mod and first of all, it works!
But!
The 20k resistor is the critical one, and with a 6k resistor it was TOO loud for me (although I'm using it with a guitar). I ended up using a 10k resistor, and now it's at unity gain, at least with my gear.
With the other resistor, I went with 3k3.
I recommend soldering in sockets in the now-empty eylets, and dialing in the proper amount (that sounds good to your ears) of resistance with a pot. Then, reading out the resistance with a DMM, replace the pot leads with the equivalent resistor. The advantage of the sockets is, that if you still want to fiddle with the resistors, you don't have to tamper with the already fragile pcb, you can just remove the bottom and hey presto, swap out the resistors!
Hope this helps
-Jonah
But!
The 20k resistor is the critical one, and with a 6k resistor it was TOO loud for me (although I'm using it with a guitar). I ended up using a 10k resistor, and now it's at unity gain, at least with my gear.
With the other resistor, I went with 3k3.
I recommend soldering in sockets in the now-empty eylets, and dialing in the proper amount (that sounds good to your ears) of resistance with a pot. Then, reading out the resistance with a DMM, replace the pot leads with the equivalent resistor. The advantage of the sockets is, that if you still want to fiddle with the resistors, you don't have to tamper with the already fragile pcb, you can just remove the bottom and hey presto, swap out the resistors!
Hope this helps
-Jonah
YEARS LATER - i did not like the original values i had changed it to, it broke up and distorted too much - i now have them somewhere near 16.8k and 8.8k and it's much better.
thanks for the update, even if its years later ...
so did your mod(s) solve the volume drop problem? is this pedal now useable with bass?
interesting info i found on: http://www.ovnilab.com/articles/filter.shtml
scroll to the last paragraph ... bad 500K pots were mentioned related to the FX-25 (without "B") ... maybe same problem with the FX-25B?
If you dont want to take a chance screwing up a rather hard to find pedal, why not just pick up a compressor? That way you could put the envelope filter in front of the compressor, and you wont experience the volume drop.
I started using the fx25 after years of it being on my shelf only after i started using a compressor.
Wahs and Envelope Filters or any effect controlled by dynamics should be before the compressor. That way you maximize the sensitivity of the effect rather than having a flattened signal going through to the effect.
I believe every bass player should have a compressor anyway, so try that.
I started using the fx25 after years of it being on my shelf only after i started using a compressor.
Wahs and Envelope Filters or any effect controlled by dynamics should be before the compressor. That way you maximize the sensitivity of the effect rather than having a flattened signal going through to the effect.
I believe every bass player should have a compressor anyway, so try that.
