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StratoSphere
Double Platinum Member
Canada
2232 Posts |
 Posted - 04/02/2006 : 17:52:44
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| i was browsing reviews on harmony-central for the tr-2, and came across a "C4" mod. apparantly all you do is cut out the C4 capacitor with a pair of scissors, and it sounds loads better.. anyone actually try this for themselves? any good? |
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phostenix
Gold Member
USA
754 Posts |
Posted - 04/02/2006 : 18:33:38
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Hmm. I don't have a TR-2, but looking at the schematic, removing C4 will affect the waveform of the LFO - the signal that makes the volume vary, giving you termolo. I'd guess that it is smoothing out the signal & removing it would give you a "harder" changing tremolo, if that makes sense. Better for choppy tremolo, at the expense of slow & smooth. But, this is all speculation on my part. Maybe someone who has one might be willing to de-solder that cap see what it does.
Grace and peace,
Steve
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StratoSphere
Double Platinum Member
Canada
2232 Posts |
Posted - 04/02/2006 : 19:16:56
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| ya most users who did NOT cut out the C4 capacitor complaimed about noise and severe volume drop. im thinking of buying a tr-2 next weekend, and am considering doing the mod. im obviously just afriad of messing up the pedal.. |
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stahlhart
Platinum Member
1318 Posts |
Posted - 04/02/2006 : 22:35:24
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A pair of scissors is ***NOT*** the correct tool for this job!!! 
The proper approach is to desolder the capacitor from the board, such that it can be resoldered if the modification ever needs to be reversed to return the pedal to stock. Why destroy the capacitor unnecessarily?
Some of those guys on H-C should just stick to playing... 
C.K.
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stinkfoot
Silver Member
Sweden
181 Posts |
Posted - 04/03/2006 : 13:07:10
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The last time I had a TR-2 in for mods, I took the opportunity and tried removing C4. I might be deaf, but to my ears it didn't make a lick of a difference. I didn't try the choppiest setting, though (wave knob fully cw), which might have made a difference - I simply set the controls where I'd normally set them (speed/depth around noon, and the wave knob more or less fully ccw, or around 9 o'clock) and tried the pedal with/without that capacitor. With those settings, I didn't hear any difference worth writing home about...
/Andreas |
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phostenix
Gold Member
USA
754 Posts |
Posted - 04/03/2006 : 17:53:17
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Andreas, obviously you forgot to put your psycho-acoustics hat on that day. 
Grace and peace,
Steve
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FRANZONI
Double Platinum Member
Ireland
3543 Posts |
Posted - 04/03/2006 : 20:28:32
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i bought a tr 2 a few months ago i don't really have a problem with a volume drop as i use it in a loop (ls2) so i can ajust the volume from the ls2 to suit,i think the tr2 is a great tremolo i saw a picture of peter greens set up and he had one as well
  as the rv3.do any of you use the ls2 to loop pedals? and did any of you notice a little high end in the signal when ls2 is on.....? |
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diggum12
Silver Member
USA
282 Posts |
Posted - 07/07/2006 : 17:23:11
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I did the C4 removal mod AND changed the R19 resistor from 10K to 4.7K. You won't really notice the C4 removal unless you do the resistor mod. Reason being is because the pedal in and of itself has the volume drop problem. The resistor mod fixed the volume drop and then some, putting my peak or "crest" of the wave slightly ABOVE the standard level, which makes the effect stand out, but not annoyingly. You absolutley will hear less noise, more defined waves and overall increase in effect output w/ this mod.
If you want the effect to be level w/ your signal, just use a 6.8K resistor (or 2 3.3K's in parallel) and it will be even keeled with your output. I recommend a 4.7K if you want the effect to be noticed. I credit Zuff from HC for the discovery.
Cheers! |
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stahlhart
Platinum Member
1318 Posts |
Posted - 07/07/2006 : 17:38:05
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I think that you meant two 3.3Ks in series -- putting them in parallel would give you a net resistance of 1.65K ohms...
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diggum12
Silver Member
USA
282 Posts |
Posted - 07/07/2006 : 19:16:33
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| Ooops. That's why you da man! |
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TR-2 Mod C4
