Xtc modding

For you Bob Villa types that modify modules

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Nutbox
RM20
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Xtc modding

Post by Nutbox » Mon Jun 09, 2014 3:40 pm

Hi there,
I was just wondering what mods can be done to the xtc module.
I know changing C3 to a .001u cap gives a tighter lower end?

But is there any other mods that can be done to improve it
I have had a search but it all seems a bit vague on what mods work on the xtc.

So all help appreciated thanks dazz

zepplin490
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Post by zepplin490 » Mon Jun 09, 2014 11:33 pm

I am wondering the same thing as to what a Beginner Modder can do with an XTC... The biggest mod ive ever done was clipping the C1 off an SL+....
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Nutbox
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Post by Nutbox » Tue Jun 10, 2014 3:50 pm

Can anybody point us in the right direction then?
Cheers dazz

tschrama
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Post by tschrama » Wed Jun 11, 2014 3:02 pm

To make it more similar to the real XTC:
-remove C10 (2.2uF)
-add 1uF over R9
-add a 2k7-220nF over R10
-remove C17 (470p)

Nutbox
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Post by Nutbox » Wed Jun 11, 2014 3:36 pm

Hi tschrama
thanks for the info, just to clarify is that piggy back the cap on to r9, and is that add a 2k7 resistor and a 220nf cap to r10.
Also is it best to use orange drop caps for this?
Thank you again for the help dazz

tschrama
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Post by tschrama » Thu Jun 12, 2014 1:57 am

yep, piggy back 1uF over R9 ; picky back a 2k7 in series with a 220nF together over R10.

These steps together compensate , more or less, for the different input stage and higher V+ of the rm100 compared to the real XTC. It will make it a bit tighter and upping the gain a bit, but it keeps the complex midrange. For a even tighert feel switch the 2.2nF input cap to 1nF, if you not allready done that. It might be a bit too uch all together. try and see...

If you have a specific tone desire with you XTC module, I might be able to give some more specific modding tips.

Nutbox
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Location: Uk

Post by Nutbox » Thu Jun 12, 2014 9:15 am

Hi tscharma ,
That sounds like a starting point as for specific tone I dont know yet , because it is a mod I am doing for my guitar tutor because he said it was pretty flat and didnt inspire him like his plexi.
I shal do these mods and see what he thinks .
thanks again much appreciated dazz

Nutbox
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Location: Uk

Post by Nutbox » Mon Jun 16, 2014 3:14 pm

Please could you clarify what would be the best piggy back caps for the mod,because I have a load of ceramics or is it best to use orange drops or silver micas?
Cheers

Mattfig
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Post by Mattfig » Mon Jun 16, 2014 4:14 pm

FWIW, when I first started modding things here and there I just used Orange Drop Caps for everything as a reference...Always good to stay with one brand when doing initial testing, then refine with different brands....Just my .02 ...
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tschrama
RM100
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Post by tschrama » Tue Jun 17, 2014 1:02 am

.. unless I am building instrumentation electronics...I dont care for different types of capacitors, brands even less so. Cheapest polyester red wima's are fine with me..

Nutbox
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Post by Nutbox » Tue Jun 17, 2014 1:21 am

Thank you for the info , whats the best site to help me start to get to know how to mod these modules the best resources shoukd we say lol.
cheers

tjames
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Post by tjames » Tue Aug 12, 2014 6:07 pm

Maybe I'll give this a try.
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relative8
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xtc mod

Post by relative8 » Fri Oct 17, 2014 7:27 am

would clipping c10 and c17 and doing nothing else, improve the sound?

Trying to get my 10th post as well, please excuse the newbiecy

JSuttie
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Post by JSuttie » Thu Sep 03, 2015 12:50 am

I know this is an old thread, but has anyone got a few sound clips of the XTC modded this way?
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Nubie
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XTC MODS

Post by Nubie » Thu Oct 12, 2017 7:41 pm

Reviving a really old thread here! I did these mods and what a difference it has made!
Thanks a lot !

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