RAT Pedal Modified :: 'The Evolution of the Rat'

Effects pedals or devices to alter the sound of your bass
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model.citizen
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RAT Pedal Modified :: 'The Evolution of the Rat'

Post by model.citizen » Sat May 01, 2010 11:16 pm

well, i finally put together the remaining experiment on my ageing Rat pedal. completely stuffed up the new casing, though now i have a template for another (plus i don't trust the cheap plastic box i'm using...though it was cheap). as such, no pix sorry! ;)

now she sports an additional footswitch to bring the hi-end gain in and out, two pots for controlling the low and hi-end gain, and a pair of 3-way toggle switches to control the low and hi-end frequency range. plus an internal output cap change.

i still need to work on the hi-end frequency range a bit...the settings are too subtle to hear even with a guitar.

at least now it retains it's low-end pretty much completely, and gives a 2-channel option to switch between a dirty overdrive and a screaming fuzz.

i might find happy settings for everything and end up rebuilding it into a slightly smaller box, with the additional controls stuffed inside.

lemme know if you want details of what went where, it's tres easy.
i like rickenbackers. and fridges.

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john
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Re: the evolution of the rat

Post by john » Sat May 01, 2010 11:33 pm

I would be keen on hearing more.
And Pics would be cool if you can

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Re: the evolution of the rat

Post by T-Dub » Sun May 02, 2010 8:29 pm

What caps did you change for more more bass?
I was going to put a clean blend in my build that I'm about to do, as well as the same footswitchable ruetz mod (great minds think alike!). If it can retain all the low end, I might just make a paralooper instead.

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Re: the evolution of the rat

Post by model.citizen » Sun May 02, 2010 8:45 pm

i changed the output cap to 4.7uF (can't remember what the original was) - did this mod ages ago but it was pretty subtle. then i tried the Ruetz...still low-end loss...added a 4.7uF electrolytic cap in parallel with the existing low-gain circuit one - that was the ticket, finally keeping (from what i can tell) all the low end.

footswitch brings the Ruetz mod in and out...instead of the low and hi gain resistors (removed completely), i've got linear 500ohm pots. and instead of the 4.7uF and 2.2uF caps for low and hi (again, removed), i've got a 3-way toggle switch wired in for each, with a selection of caps wired to each pole (1.1uF, 1.1uF, 3.5uF for the hi...2.2uF, 4.7uF, 4.7uF for the low).

the two gain controls act as a blend of sorts...with the low-end gain down, the high-end gain controls the amount of "boost" that the additional footswitch gives. right up at maximum she starts to really splutter and squeal, quite nasty. add to that the 3-way frequency range switch, and there's a lot of noise to be had. and this with the low-gain keeping the low-end girth happening.

with the low-gain up, the boost isn't as pronounced, and disappears when the low-gain is maxxed. again, at full gain it can get pretty nasty (read: nice!).

the new controls, along with the standard controls, open up all kinds of sounds. some form of bass boost option would be cool, might think about that for it's next revision.
i like rickenbackers. and fridges.

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Re: the evolution of the rat

Post by john » Mon May 03, 2010 1:05 am

Wow. Sounds awesome. Any chance of putting up any sound clips? or a you tube so we can see what you're doing

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Re: the evolution of the rat

Post by john » Mon May 03, 2010 1:13 am

T-Dub wrote:What caps did you change for more more bass?
I was going to put a clean blend in my build that I'm about to do, as well as the same footswitchable ruetz mod (great minds think alike!). If it can retain all the low end, I might just make a paralooper instead.
You probably have come across this already, but this is a simple blender that you could put in your build

http://www.seanm.ca/stomp/minblend.html
And this is a bit simpler then the para looper
http://www.seanm.ca/stomp/bblender.html

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model.citizen
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Re: the evolution of the rat

Post by model.citizen » Mon May 03, 2010 8:29 am

i put together the b.blender a while back...and never got it to work. i might revisit it, it is a simple circuit.

john - i'll have to find an original un-molested Rat to do a proper comparison, plus find some chops to make a Youtube viddy not so cringe-worthy!

here's some pix of the beast. gotta love my stuffed up case (didn't leave enough room for the long-body jacks when i first drilled it). plus the plastic's cracked already after only a couple of tests (anyone know where i can get a metal case that won't cost me my first born?).

orange cap in the second shot is the replacement output cap. one of the leads from the circuit to the pots/switches actually comes from the underside of the pcb, as the copper track broke off on an earlier attempt :(

Image
Image
Image
Image
i like rickenbackers. and fridges.

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Re: the evolution of the rat

Post by john » Mon May 03, 2010 12:15 pm

Ha ha ha . Yeah you could do with a new case. Jaycar has enclosures that would fit that for about $15 i think.
Seeing really shows how much you have actually done, good work.
re the utube. I am not so interested in chops or a comparison with an original, Just the nasty (read good) :mrgreen: tones of yours. Plus the splatter and squeal :twisted:

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Re: the evolution of the rat

Post by model.citizen » Mon May 03, 2010 1:07 pm

heh heh...that one was an $18 jaycar special...pity, 'cause it's a wedged shape that's very pedalboard-friendly. in all fairness i got a plastic case as i wasn't too sure what was going to fit where. and as it stands i ended up wiring the flyleads too short - hence the rat sitting on the RHS of the casing rather than the left.

they had some thin metal cases for about the same price, might have to get one of those. an alloy case would set me back around $40! :shock:

i'll see what i can do youtube-wise...it'll be my first time...

i forgot to mention that (in the pix) i added an extra 4.7uF cap on the "sub" frequency...i think it's a wee bit deeper now (total 15uF), but something i won't be able to test until Thursday when i can crank it at practise (oh to have a frequency analyser!).
i like rickenbackers. and fridges.

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Re: the evolution of the rat

Post by timi » Mon May 03, 2010 1:31 pm

I've already done the ruetz mod on mine (with a switch) but might look into the output caps.

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Re: the evolution of the rat

Post by T-Dub » Mon May 03, 2010 2:13 pm

[quote="john"]
You probably have come across this already, but this is a simple blender that you could put in your build
http://www.seanm.ca/stomp/minblend.html

Yeah bang on, I was going to put the FET version in.

I love the creed references on that build "I think I'll say...yasseah...don-no why I'm always doin' that." "Gonna take off ma glooove"


http://www.youtube.com/watch?v=ipy58SaIRhs[/youtube]

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Re: the evolution of the rat

Post by model.citizen » Mon May 03, 2010 2:56 pm

T-Dub wrote:I love the creed references on that build "I think I'll say...yasseah...don-no why I'm always doin' that." "Gonna take off ma glooove"
yep, named it after that clip (checked out Creed Shreds 4 yet? utter masterpiece!).

Dookin is the normal effect, Yasseah! is when i wanna make it scream :twisted:
i like rickenbackers. and fridges.

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model.citizen
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Re: the evolution of the rat

Post by model.citizen » Mon May 03, 2010 2:59 pm

timi wrote:I've already done the ruetz mod on mine (with a switch) but might look into the output caps.
don't worry too much about the (master) output cap (it didn't do much if anything that i could tell).

just wire another 4.7uF electrolytic in parallel to the existing 4.7uF, and it'll be much fatter. guys in the band were floored when i brought it in for practise after this mod.
i like rickenbackers. and fridges.

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Re: RAT Pedal Modified :: 'The Evolution of the Rat'

Post by ash » Sun May 09, 2010 4:26 pm

Super stuff!

I've been making lots of guitar edals and trying them all with bass and they all have too much bass-suck to be useful.

I have similar plans to experiment with blending and biamping a fuzz pedal rather than a Rat. Although I do have a Rat to try it on.

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Re: RAT Pedal Modified :: 'The Evolution of the Rat'

Post by model.citizen » Sun May 09, 2010 6:50 pm

after some testing, i removed the low-gain frequency selector - couldn't hear any real discernable difference between the settings, so i hard-wired 15uF of cap in there (10uF + 4.7uF, in parallel).

been fiddling with the hi-gain frequency caps a bit too...and probably more later just coz the tinkerer in me can't stop fiddling with stuff.

next step, an LED for the Yasseah! channel.

Image

and a soundclip - dirge-like riff (actually an intro to one of our tunes) played badly on an out-of-tune 4003, into the D-Y!, into a VT Bass (clean SVT setting), into the laptop, stereo-ised, then normalised. different settings on the D-Y! throughout, mainly with distortion at 12 o'clock and filter at 9 o'clock.

http://www.mediafire.com/download.php?yn0zgmmoyzi
i like rickenbackers. and fridges.

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