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- Users: jarscar
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Millett "Starving Student" hybrid amp
uote: Yeah and I fixed my grounding scheme, all my problems had to do with a daisy chain grounding. I no longer have any noise at all, and I didn't directly ground my parts to the case, but l didn't insulate them from the case either, the ground of the RCA jacks for instance connect to the...- jarscar
- Post #6,530
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
Quote: The case being metal isn't a big deal, everything that connects to it will be grounded and in the end your case will be grounded also, the only thing you really need to worry about is shorting the circuit by accidentally touching a solder joint or stray wire to the case. The only...- jarscar
- Post #6,528
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
Quote: Edit: I turned it off and walked away, I guess I shouldn't jump to conclusions, the voltages are all correct now, I guess I should have unplugged everything then tested again, but thank goodness it was just user error and not mechanical failure. Also I'm buying a new multimeter, and...- jarscar
- Post #6,518
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
Quote: Thanks a ton, that tells me enough to play it safe and just rebuild that section of the amp, I've got enough spare parts so there's no reason not to- jarscar
- Post #6,517
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
Quote: I'm getting around 34v at the gate for the MOSFET acting up and 15v for the one working fine- jarscar
- Post #6,515
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
I had to take my amp apart to fix an issue I was having with the paint job, upon putting it back together one of my MOSFETs is getting well over 40v from the source pin instead of ~13v I didn't have to change any wiring when I took it apart, aside from having to disconnect the RCA jacks and...- jarscar
- Post #6,513
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
*Edit I just did a quick thread search, tons of heat is apparently normal. I'm seriously giddy over how awesome this thing sounds though. Well I've been using this happily for a while now, sounds awesome. One question though: just how hot is this supposed to get? cause after about an hour...- jarscar
- Post #6,510
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
I actually went back and redid a large portion of the grounding, it reduced the loudness of the hum by about 50% and now I have to have the volume up a little higher before the hum is really apparent, it's probably still not as good as many of the amps built by people here but this has taught me...- jarscar
- Post #6,507
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
Quote: That's how mine is, at anywhere from 0-30% my right channel is a little bit louder, but if I turn down the source audio and turn up the amp volume the audio levels out and both ears have even sound, it's probably because I spent about 50 cents on the pot :/- jarscar
- Post #6,505
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
I got the case at taydaelectronics.com it's a diecast aluminum case, I had to prime and paint it myself but I love the size. I sanded the edge of the bottom plate to give it a brushed finish.- jarscar
- Post #6,503
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
Quote: That's actually very helpful, sadly as you just said, I'd have to rebuild the amp to achieve total silence, as it sits I fixed the nasty buzz in the right ear, and it is dead silent with volume at off, at high level maybe 75% volume I begin hearing an audible but mostly harmless...- jarscar
- Post #6,499
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
Looks like I was a little too optimistic about that buzz/hum, I checked all my soldering, made sure nothing was shorting, checked and rechecked voltages, made sure everything was properly grounded, etc etc. The buzz/hum is only in the the right ear and is independent of the volume, if I...- jarscar
- Post #6,496
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
Yup, had my capacitor polarity off, works fine now, have a pretty ugly hum though, I've got a couple ideas what that is though, a little more tinkering and I think I've finally got a winner! Thank you so much for the help, I have only asked a couple questions but I can't help but me a little...- jarscar
- Post #6,495
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
Quote: Thanks, I'll look after work. If I had to be honest then I'd have to say that last part, with the parallel capacitors(one electrolytic, one not), threw me for a loop at first. I looked at the original P2P builds from earlier in this post and tried to match the wiring but I probably...- jarscar
- Post #6,494
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
Ok I got everything built and done, put the tubes in and fired it up, clear as a bell out of the left side, right side I hear just a hint of sound, the MOSFETs seem to heat up and the tubes light up, I basically rebuilt the whole right side in case I had a bad connection or got a wire in the...- jarscar
- Post #6,492
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
Quote: Thanks, I'll most likely end up doing that build, I was kinda hoping these 12SN7-GTs would work because they're the best looking/condition tubes I've found in my pile, but for the sake of simplicity I'll probably just use the 12SR7s or even buy some 12AU7s- jarscar
- Post #6,481
- Forum: DIY (Do-It-Yourself) Discussions
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Millett "Starving Student" hybrid amp
Hi all, I just got a huge assortment of tubes, and it made me want to really try building this amp. A lot of these tube boxes are mislabeled but just from what I've gone through I've got: 2 pair of 12SR7s, but they look a tad rusty but two look fine 3 12AH7-GTs (in so-so condition) an...- jarscar
- Post #6,476
- Forum: DIY (Do-It-Yourself) Discussions