GrindingThud

Thanks, I figured as much, especially with the servo....but I thought I'd check.

How immune do we think the design is to TRS jack shorting? I plan to depower when jacking, but just in case....

Ummmm, WoW, and that's an understatement. Thank you to all involved with this project. This is just an absolutely crazy good sounding amp. I'm not done putting together all the packaging and grounds but just had to jack into it with some ad-hoc jumpers. Outstanding!

Did a trial power up this evening....no smoke. Test points measured in high like you said. Took about 5 turns to level it out to .125 Did not get to listen to it yet.....the audio inputs, volume, and outputs are not wired.

oo, thanks! exactly what I was looking for.

I'm getting close to the point where I'm able to power up the amp. I've got the trim pots set in the middle (250Ohmz).....any idea how close centered is to the desired bias point? I'm assuming 125mv cold is across the 2ohm output resistor test points. Btw there is an ebay unit up for sale again....2999..

I can shrink em and just upload here.....fixed. Got the PSU up and running after some minor troubleshooting. The big caps I used were snap ins and the hole in the PCB was a hair tight. When I opened the holes up a little to fit them, I inadvertently removed the through plating, leaving them ungrounded (doh). ...now on to finish the amp

I've never ordered such a large BOM from Mouser before, what an outstanding company. Perfectly packaged, labeled, and verified:

Woohoo, Santa says I have a package from a far away land waiting for me at the post office......

Nice! How is your circuit ground tied to chassis ground...looks like you have an RC network there?

All three of those I had not considered, thanks! The Lemos I had completely forgotten about and are very cool. What caught my attention on using cat6 is it's available in 22awg and good to 250Mhz. Using the whole cable, much like the DB9 Krell originally used, I've convinced myself it will work well and look good.....until of course my kids plug the computer network into it. Still not sure I'll do it though, there's something special about the mil spec connectors.

OMg, that's crap! $12 connectors filled with goo. What brand/model is stamped on the cable...or is that a "custom" bundle?

Sweet! Almost done collecting parts here....just need a few more and the boards to come in from Lil' Knight and I'm building. What value Pot did you end up using? I'm going to use Amphenol military PT06A84 as the connectors for the umbilical....but then considered trying Neutrik RJ45 connectors. http://www.mouser.com/ProductDetail/Neutrik/NE8FDV-Y110/?qs=sGAEpiMZZMvQhAhQbXdbBsdmA6gGtClgIownSYewpEY%3d Looks like they can handle the load and would be very tidy. Thoughts?

Thanks. I'm assuming if it stays in class A, the amp won't draw much more from where it is biased at.

Very nice! What transformer is that?

Yes, PS will be in a remote chassis. . I may also use a sigma22 PS in one of these: http://www.ebay.com/itm/120945750823 Like this: http://cdn.head-fi.org/9/90/9037f0cb_b22_2ch_insides.jpeg

I plan on using Neutrik connectors. Any opinions on if it would be worth also putting 4 pin XLR output? http://www.mouser.com/Search/ProductDetail.aspx?R=NJ3FP6C-Bvirtualkey56810000virtualkey568-NJ3FP6C-B http://www.mouser.com/Search/ProductDetail.aspx?R=NC4FD-LX-Bvirtualkey56810000virtualkey568-NC4FD-LX-B

eBay link here: http://www.ebay.com/itm/400523705862 Internal height is just under 2.5" Internal dimensions: Width 310mm Height 62mm Depth 240mm External dimensions: width 320mm Height 70mm Depth 248mm Front panel 8mm thickness. Back panel,Top and Base plate 3mm thickness. side panel:4mm thickness.

I found a picture of one online that looks like it's got an ALPS 10K....I'll try that and see how it goes. http://www.avx.hu/forum/index.php?/topic/41329-krell-ksa-5v/?p=1313992 Looks like I'm going to try and squeeze it in here:

Ok, I think the last thing on my order list is the pot.... Any suggestions in this area? I was thinking an alps 50K...what was in the Original Krell?

Read the thread again....these appear to be ok. Never mind...... The 4 extra 4.7uf Wimas are specd at 63v/5%....see any issue downsizing to 50v/10%? The main caps are 35v and these are in parallel with those. Saves $13 and they are in stock.... Has anyone settled on a nice transformer? I'm looking at this one, 50VA at 120V: http://www.mouser.com/ds/2/410/VPT48-1040-224303.pdf

Thanks!

Ok, so I'm building this out in Mouser and notice the Vishay resistors are 1/4 watt (except the 2ohm at 3W) vs the Xicons at 1/2 watt. Is 1/4w ok? Lol....the parts are adding up quickly. Also looking at the LSK389...do we want A, B, or C version (different Idss ranges)

Thanks! I see I have choice of board thickness. I assume .062 is adequate for this build? Also see that there are two power supplies and some are using Sigma22. Is there an opinion on what supply is best?