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mojah63
Copper Member
USA
10 Posts |
 Posted - 09/09/2008 : 15:48:12
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quote:
Originally posted by cctsim
I don't have the MT2 but If I had one I would try changing R34 to something like 6.8k or even 10k. This is an RLC simulating gyrator but the center frequency is set to 4894 Hz. This is way to high.
A value of 10k will set it to 1547 Hz which is more HM2 territory.
with a Q of .69
You'll need to adjust the whole thing if you what to have the same Q (notch width) the gyrators, stock, from input to output are 953hz 2.81Q, 4896hz 2.17Q, 105hz 14.6Q. A typical 1/3 octave bandpass will have a Q of about 4.3 and a 2/3 octave filter Q value could be about 2.4 There is a calculator here: http://www.muzique.com/lab/gyrator.htm
To change the gain would ad another wrinkle r44 and r30 would be the easiest suspects..
It is a VERY interesting concept never the less thanks for bringing it up, cctsim. I just did some of moonwatchers mods and I'll know tonight at rehearsal how that works out.
A great test would be to disable the pre and post distortion gyrators, put an eq pedal before and after the mt-2 and see where you end up then adjust the gyrators accordingly... |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 09/09/2008 : 16:53:50
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| Wow! THanks! |
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MoonWatcher
Bronze Member
USA
98 Posts |
Posted - 09/10/2008 : 20:56:40
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I just got a batch of 4580L chips that I want to put in this pedal. Unfortunately, one of them sounded pretty poor in my DS-1...
The slew rate is on the high side, but the gain bandwidth product is astounding. |
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mojah63
Copper Member
USA
10 Posts |
Posted - 09/11/2008 : 02:12:35
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quote:
Originally posted by MoonWatcher
I just got a batch of 4580L chips that I want to put in this pedal. Unfortunately, one of them sounded pretty poor in my DS-1...
The slew rate is on the high side, but the gain bandwidth product is astounding.
Did your ds-1 have the new NJM3404AL chip in it? Some reports have this sounding a smother than the M5223AL.. I have a beat up silver screw I've been using for the last 12 years. Love it... I push it with a rangemaster clone for solos.
My mt-2 sounds better/different but not good enough to replace any of my other dirt pedals on my board (ds-1, ocd). I may start from scratch.. I didn't mind the stock lower mid wha sound but the upper mids were too much and it didn't have enough low end for what I want it to do on my rig. It will be a bit before I can get back to it. |
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MoonWatcher
Bronze Member
USA
98 Posts |
Posted - 09/11/2008 : 05:48:30
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quote:
Originally posted by mojah63
Did your ds-1 have the new NJM3404AL chip in it? Some reports have this sounding a smother than the M5223AL..
This is potentially great news - I want to get a brand new DS-1 so I can evaluate that chip!
I used to really bash the Mitsubishi chips, but the 5223 is pretty good, as a result of my testing. |
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JCDenton6
Bronze Member
USA
101 Posts |
Posted - 01/15/2010 : 04:32:02
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quote:
Originally posted by Dingus
This thread had me revisiting my MT-2, and my recent ML-2 that I just got from a pawn shop. I was listening to Keeley's clips on his website, and I must say that the ML-2 sounds a lot like the keeley-modded MT-2 clips to me... any one else hear that?
Hello Dingus, you are right about the ML-2, it does! You can't go wrong with that. But The Boss ML-2 uses SMD components and has some COSM modeling, which makes it VERY difficult to modify...but I wonder how that would sound |
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JCDenton6
Bronze Member
USA
101 Posts |
Posted - 01/15/2010 : 14:58:53
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Hey mojah63, @freestompboxes.org you talked about getting some Mouser 575-113120 parts if you constantly switch out components.
That's a brilliant idea good sir! That's new to me.
But how would you cut the Mouser 575-113120?
EDIT: Nevermind, they sent my order with the sockets pre-cut...Don't mind me, as I'm still new to modding pedals. |
Edited by - JCDenton6 on 01/20/2010 01:31:36 |
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Keeley mod for MT-2
