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05-27-2008, 07:00 AM
| | Registered User | | Join Date: Aug 2007 Location: Stevens Point, WI | | | Burr Brown I.C. for HBE Hematoma? Or not?
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Anyone know anything about this mod for the Hematoma? Is it a worthwhile upgrade? I found it offered at http://www.customguitargear.com/hbehematoma.html for $16
This is apparently a "famous" IC and gives a "smooth, warm, round tone". I've been going between a fulltone and hematoma for a long time, and am getting closer to the hematoma every day. Just trying to decide on the details now. Thanks.
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05-27-2008, 07:15 AM
| | Registered User | | Join Date: Jun 2007 Location: Guildford / Exeter | | | Don't bother. It's perfect on its own.
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05-27-2008, 07:20 AM
| | Registered User | | Join Date: Mar 2007 Location: Hilversum | | | If you do want the mod, open up the pedal. If there is a socket with an 8-pin black chip, its as easy as taking it out, and inserting the BB I.C. BTW, the burrbrown op-amps only cost about 3 bucks.
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05-27-2008, 10:43 AM
|  | OVNIFX
EXAR pedals rep for North & Central America | | Join Date: Oct 2005 Location: PDX, OR | | | FWIW the Burr-Browns are known for having less distortion than some other opamps, so that may not be what you want. |
05-27-2008, 11:17 AM
|  | I Know Nothing | | Join Date: Dec 2003 Location: Columbia River Gorge, WA. | | Quote:
Originally Posted by Beachcoma  BTW, the burrbrown op-amps only cost about 3 bucks. | B-B makes a zillion different opamps. 16 bucks would be more or less reasonable for OPA627, a ripoff for OPA2134 or 2604. |
05-27-2008, 11:54 AM
| | Registered User | | Join Date: Dec 2006 Location: Fort Myers, FL | | | I suppose I would see what was in there first. If the stock opamp is a TL072, I would try out an OPA2134. If it's a 5532, I would leave it alone...
I use a lot of OPA2134s, but I usually use them in the clean blend circuits that I add to most effects. I'm a big TL072 fan, they are very cheap and very low noise. |
05-27-2008, 02:37 PM
| | Banned | | Join Date: Feb 2006 Location: West Coast of Canada | | Quote:
Originally Posted by CraigD30 This is apparently a "famous" IC and gives a "smooth, warm, round tone" | Never heard of the mod, but my Hema gives that kinda tone without ANY mods. |
05-27-2008, 07:11 PM
| | Registered User | | Join Date: Nov 2002 Location: Everywhere, USA | | | I did the mod. I had the Amp Shop in LA do it for me.
It really just smooths the tones from the pedal out. You can still get agressive, however, the mellows are more mellows and, to my ear, the BB makes things sound more old school. Also, on the pre-amp, it makes the boost effect a little less obvious when first pressed.
I thought it was worth it, but I still have the original chip also, so that if I wanted I could go back and forth.
Either way you go, you can't lose, because, as others have said, that pedal rocks no matter what. |
05-28-2008, 05:19 AM
|  | Registered User | | Join Date: May 2003 Location: Leeds, UK | | | Burr Brown's are great chips but they're not a panacea to good tone. $16 seems reasonable.
You'd be just as well buying a selection of 8-pin ICs and trying them out.
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05-28-2008, 06:12 AM
| | Registered User | | Join Date: Jan 2003 Location: Saskatoon, Canada | | | The question is which Burr-Brown op-amp.... (they make slew of them)?
As mentioned earlier, the OPA2134 and OPA2604 are way overpriced at $16, and I don't particularly like either one - IMO the OPA2132 is a bit better (more open-sounding). A pair of AD825s on a DIP adapter sounds even better yet. Although some of their commonly used op-amps are on the warm side, BB make a number of chips which sound completely different. Also, while a standard TL072 may not be the cleanest sounding chip for hi-fi use, it's inherent fuzzy midrange character seems to work well for distortion boxes.
National, Analog Devices, TI, etc... also make a number of high performance op-amps worth looking into.... e.g. LM4562, THS4032, AD827, OPA211, AD8599, AD8022, etc....
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05-28-2008, 04:02 PM
| | Registered User | | Join Date: Aug 2007 Location: Stevens Point, WI | | | Thanks for everyone's input. I e-mailed them for info on the chip they use, and they told me HBE dosen't give out the BB part #, so I have no idea what I'd be getting with this option. I think I'll just keep it OG. Or maybe not. We'll see. Thanks again.
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Last edited by CraigD30 : 05-29-2008 at 02:58 AM.
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