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The Kurt Rosenwinkel Forum » Tag: Mod - Recent Posts http://www.kurtrosenwinkel.com/forum/ The Kurt Rosenwinkel Forum » Tag: Mod - Recent Posts en Sat, 25 Jun 2016 19:29:51 +0000 add4 on "Kurt's OOOOOOLD problem with the rat" http://www.kurtrosenwinkel.com/forum/topic/kurts-oooooold-problem-with-the-rat#post-14125
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Sat, 06 Jun 2015 00:39:11 +0000
add4 14125@http://www.kurtrosenwinkel.com/forum/ <p>So i guess i am (very) late to the party, but in case Kurt still has any interest in this here is something that i think could have interested him 8 years ago.</p> <p>I was planning my pedalboard, and when i wrote 'rat' in the list, i remembered that i usually never like the rat with my volume pot all the way up, and wondered if i could find a way to integrate the effect of having the pickups volume down in the pedal, that would be great.<br /> Then i remembered that it's a commonly done mod for the fuzz face in order to provide subtler shades of distortion.</p> <p>Quoting the excellent article of R.G. Keen: 'the technology of the fuzz face' (<a href="http://www.geofex.com/article_folders/fuzzface/fffram.htm" rel="nofollow">http://www.geofex.com/article_folders/fuzzface/fffram.htm</a> )<br /> <blockquote>Another (Mod) is to connect a 50K pot, again as a series resistor, in series with the input of the circuit, before the 2.2uF input capacitor.</p> <p>If that last one seems a little odd, think back to what I said about the low input impedance. With a low input impedance, the input loads a guitar significantly; the base can only move a few tens of millivolts before cutting off or saturating the first transistor. If you put a resistor in series with the guitar pickup, it raises the apparent source impedance of the pickup, making it look more like a current source (albeit a tiny one) and less like a voltage source. A signal from a current source lets the input of the effect seek it's own voltage level, and merely supplies a varying current. This can be much more linear than a voltage source drive. As a result, the variable resistor allow you to radically clean up the distortion that the FF produces, producing subtle shades of softer distortion.</p> <p>In effect, the output mod is a "more" control, and the input mod is a "less" control. As you would expect, the two added controls can interact to produce many shades of distortion.<br /> </blockquote></p> <p>that mod is more simply explained at having another 'volume' pot as the one in the guitar, in front of the pedal.</p> <p>So a simple pot wired in series at the entrance of a pedal<br /> - lowers the input volume to the user's liking, allowing for better control on the distortion produced by the pedal<br /> - solves impedance problems linked to the pickup (if there is one, the input of the rat should theoretically be impervious to impedance problems)</p> <p>which is exactly what i'd like to have in front of the rat, while i keep my guitar's output pot where i want it.</p> <p>This remembered me kurt's question from 2007 on gearslutz: </p> <p><blockquote><br /> also a related question: my guitars outputs are too high and i dont like how they interact with my distortion box (rat). can i use some kind of d.i. box like an atty or radial jdv to sculpt how the guitar feeds the distortion box? </p> <p>...</p> <p>i also am playing a new guitar and i want to have some flexibility with how it affects the RAT pedal. i have a feeling that its not only a question of volume but also of impedance or ohms from the pickup. </p> <p>i think the solution might ultimately be different pickups, but for now i want a work around. i dont want to just lower the volume knob.<br /> </blockquote></p> <p>So in case it helps, i think it might be as easy as doing the mod i just mentioned. Of course i haven't tried it myself (yet) and i have about one thousand other pedal related stuff i want to do before that (babies makes you late in every personal project you had).<br /> But it think it would be worth trying and it could be as simple as using a simple pot, crocodile 'cables' and 2 jacks and put info in front of the rat, or have someone do the mod for you, or ask someone to build a rat with this mod.<br /> I know i'll try this when i'll build one for myself, with a few other mods to make the pedal more useable in a 'jazz' situation.</p> <p>Anyway i guess the question is completely out of scope now that Kurts rig is digital but in case it's still helpful, and/or for the sake of intellectual curiosity i thought i'd share.</p> <p>Peace<br /> Arnaud </p>
JorgeRubiales on "Fender Twin Mod - Speakers?" http://www.kurtrosenwinkel.com/forum/topic/fender-twin-mod-speakers#post-4577
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Thu, 12 May 2011 10:39:59 +0000
JorgeRubiales 4577@http://www.kurtrosenwinkel.com/forum/ <p>+1 to the 15&quot; </p>
fakejake on "Fender Twin Mod - Speakers?" http://www.kurtrosenwinkel.com/forum/topic/fender-twin-mod-speakers#post-4576
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Thu, 12 May 2011 02:21:46 +0000
fakejake 4576@http://www.kurtrosenwinkel.com/forum/ <p>I dont have a Twin, but for any amp that is large enough (twin is, deluxe reverb as well) I would seriously consider putting in a single 15&#39;&#39; speaker, especially for jazz. Better bass response, cheaper and less weight than 12&#39;&#39;. You need a new baffleboard though. If the one in the fender reissues is a particle board (like in the silverfaces), you could replace it for a solid one, which should be a nice improvement as well. </p>
jbroad on "Fender Twin Mod - Speakers?" http://www.kurtrosenwinkel.com/forum/topic/fender-twin-mod-speakers#post-4573
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Wed, 11 May 2011 14:35:17 +0000
jbroad 4573@http://www.kurtrosenwinkel.com/forum/ <p>i would go with the jenset jet tornado neo speakers if you want to save your back. they are very similar to the EVM12L but are considerably lighter. i have one in my port city OS 1x12 wave cab and it sound fantastic </p>
Basile865 on "Fender Twin Mod - Speakers?" http://www.kurtrosenwinkel.com/forum/topic/fender-twin-mod-speakers#post-4572
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Wed, 11 May 2011 11:22:02 +0000
Basile865 4572@http://www.kurtrosenwinkel.com/forum/ <p>I&#39;m going to be needing to replace the speakers in mine as well, as one is flubbing out under high volume (I bought the twin used).</p> <p>I was very interested in the Electro-Voice EVM 12L Classic. Its essentially a speaker that has 200 watts handling and will not flub out or distort at all. It takes anything you throw at it and stays strong and clean all the way up through the volume level.</p> <p>Those are the pros. The cons is that theyre pricey at about $230 a piece, and I believe they&#39;d add considerable weight to the twin - as if they&#39;re not heavy enough already! But to have a very powerful and capable speaker would almost be worth it. Not sure if I&#39;m willing to pay that though.</p> <p>I recently found out about the Eminence Delta Pro 12A which essentially is noted as similar to the EVM 12L. Various reviews say they&#39;re a little warmer then the EVM 12L. They have a whopping 80 oz. magnet and 400 watts handling power. Sounds like a bit of overkill for a guitar speaker, but they get good reviews and are $120 a piece.</p> <p>The other option is to replace with the factory Jensen C12K speakers. They handle 100 watts and sound great from the newer reissues that I&#39;ve played. I have an older one with eminence speakers currently which sound just fine but they&#39;re tired and fart a little bit at higher volume levels.</p> <p>The thing I try to shoot for is a ceramic magnet and at least 50 oz. in magnet size. Larger magnets keep the low end nice and tight. Smaller magnets like 35 oz. tend to be better suited towards a musical break up. Sort&#39;ve like a Celestion Greenback. Thats not really what a twin is built for though. Ceramic magnets I feel are a little warmer then Alnico. Alnico have a little more chime and detail in the top end.</p> <p>The super high power speakers run a risk of sounding a bit hi-fi I think, which is something Jazz players would probably want to avoid, but we could probably EQ out the high treble and have a super strong low end which is something I&#39;d love. Good Luck with it! </p>
steepcreeks on "Fender Twin Mod - Speakers?" http://www.kurtrosenwinkel.com/forum/topic/fender-twin-mod-speakers#post-4571
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Wed, 11 May 2011 10:18:03 +0000
steepcreeks 4571@http://www.kurtrosenwinkel.com/forum/ <p>Anyone care to share nuances of different speakers for a Fender Twin. Having a 65 re-issue modded and need some suggestions. Thanks </p>