Quote:   I biased the MOSFETS around 240mV, power supply is set at 27VDC.  I was also concerned with heat buildup, but I think my very thick AL plate has enough thermal mass to keep things cool for the durations I am running the amp, and maybe the ability to dissappate the heat as well. ...

Quote:   Check my signature for a link to a build gallery.  There are a few there.  I'm on travel right now, but when I get a chance, I'll take more of the internals.

Quote: Nice catch.  Edited.

Well, I just completed my first amp build.  It is a Millet Hybrid MOSFET-MAX V1.2.  The amp itself sounds wonderful and really impressive.  Such a difference in sound a little tube can make.   The case is custom.  I used .375" thick 6061 AL for the base.  I had to put in 8 drilled and tapped...

Quote:   Wow, that is amazing.  I'm working on my own right now.  Can I ask how you made that case?

First, I'm not saying that my methods will work for everyone.  I'm just putting them down so that someone else may learn and they can try them for themselves and determine if it's right for their project.   That being said, I recently finished my first ever SMD project, the grubDAC.  I...

Okay, after reviewing the BOM and board, if you aren't going to have the input switching, it's as easy as not purchasing anything in the "INPUT Control" section of the BOM: RS1...to the 2-pos terminal block.  

As others have noted, if you want quality parts it costs some. However, there are ways to reduce your costs on the build, without sacrificing quality. There is a section for input switching that you don't necessarily need if you are never going to use either an onboard DAC or second analog...

You can purchase a pair of 2N5486 from amb.org/shop for US $0.50 per pair.  Not sure if you are saying you can't find them or can't receive them, but AMB ships worldwide.

Knavish, I was just like you about 3 weeks ago.  Never built any DIY audio equipment at all.  I started with the MOSFET MAX myself.  It's fairly easy to build, as you said, it's all through-hole mounting, no SMD.  Using the BOM on diyforums.org for the Max makes it easy to order.  If you are...

Thanks for all the help Tom. I have made the proper adjustments. Also, tonight I final hear sound through the amp. Some Pink Floyd, Adele, and Foo Fighters. I'm not sure if I'm just biased, but it sounds great. The sound is interesting. This is too much fun!

I have another question that came to light last night.  When I first powered on and tuned my MOSFET-MAX I did not have my potentiometer installed, nor did I have any input or outputs installed.  Last night, I was messing around and forgot that I'd placed the pot on the board and I went to check...

Quote: Could I possibly switch out my Skeleton DAC for a Grub DAC and pay the difference?

Quote: Hey Tom, any chance you have or are getting more GrubDAC kits?  Or even just the PCB?

Question on source selection.   I've decided to go ahead and add in the skeleton DAC to my board.  I'm now reviewing my options for switching sources.  Of course, I could use a simple SPST attached at "IS".  However I was thinking about using the TRS headphone jack as the switch, such that...

Well, today was first power on for my MOSFET MAX.  The build was more difficult than my Millet P-P Engineer's Amplifier.  I guess because many of the components are smaller and closer together.  I made two mistakes while building, which I noticed immediately after I did them.  Both mistakes was...

Quote:   My reasoning behind the change is simply cosmetic in nature.  I'm not smart enough to go messing around with higher voltages.  I'd still tune the on board regulator to around 27VDC.  On your second note, that may be more of a concern.  I don't want to introduce any additional...

Quote: Yes, my thought was to not bypass the voltage regulator on the board.  I wouldn't have expected the SMPS to provide cleaner juice than what was there.  I'd only bypass the diode bridge (not needed).  Tom, does this alleviate your concern?   I had two concerns, the first being...

Speaking of the walwart power supply, I'm looking into alternatives.  I'm not a big fan of blocky, outlet hogging converters, convenient as they are.  I was looking into a different input source without by passing the the two 2200uf capacitor bank or voltage regulator.  I was wanting something...

Quote:   I think I will stick with the MOSFET-MAX version right now, since that is the direction I have already set out on.  I ordered a matched quad set of the Toshiba 2SJ74BL & 2SK170BL from AMB.org and a pair of 12AE6's from you (I think), Tom, along with the v1.2 PCB and other...

Quote: I was going with MOSFET.  However, I'm not knowledgeable enough to know which I should lean towards.  I don't have headphones for this yet.  I've been using cheap things that technically work, but will purchase a nice mid-range, closed-back, over-the-ear set for work.  Maybe the...

Hello Everyone, Very new to DIY Audio, just ordered some parts for a Hybrid Maxed Amp that I plan using at work.  I'll probably get most the little stuff before the PCB board gets here, but I'm taking the chance to organize my work bench.  I'll post some build shots as I move along, and I...