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Discussion in 'DIY (Do-It-Yourself) Discussions' started by pmillett, Mar 12, 2017.
Stupid question. Are the opamps in this unit singles or duals?
Got a part number for your heatsink?
Can you send a link to the linear supply you bought?
It uses two TI OPA551PAs (http://www.mouser.com/ProductDetail/Texas-Instruments/OPA551PA/?qs=wgAEGBTxy7kLauCnM%2btIHQ==). They are singles.
577002B00000G. Any std package with 0.25" fin height or less should work. Might be able to pull off up to ~0.40" if mounted backward (pointed away from the 1/4 jack). I have a few in that range in my cart for whenever I pull the trigger on another digikey order. Even with the small heatsink I measure up to ~140F. Probably OK, but I'd prefer to have it run cooler.
Well, I accidentally left my NuHybrid on all day while I was at work and came home to listen to some music tonight. It sounds amazing having been on all day. I imagine that isn't the best idea, but the difference is noticeable!
Hey thanks a lot for answering my question. When I finally get the parts for my build, I think I'm going to stick a couple of Sparko's Labs singles in there if the specs match up.
Interesting module. Datasheet mentions unity gain stability issues and output current isn't as high as the OPA551, so wonder if you'd run into issues with harder to drive HPs and higher volumes. I haven't tried rolling myself as the OPA551s seem to be great performers, but keep us up to date if you try it.
Ha, I've done the same. Did sound good, but it may be because I'm coming back to a warm amp after a rough day at work. haha.
Here it is, very happy so far.