luvdunhill

This graph is worthless without the compliment devices, but ...

excellent! So, on that note, despite the fact I'm not finished with the n-ch MOSFETs, I feel that I will in fact have a few matched devices left over from my contribution to the MOSFET order after I take the devices out for another project. After a lot of thinking, I will only be offering them as matched pairs, not quads per the rest of the group buy. Also, I'd like to sell the rest of the devices with them, excluding the JFETs (unless they don't sell and I get really, really bored). I'll make sure to order enough boards to cover these possible builds as well. I'm tempted to ask the same price as the group buy ($60 a board), despite the reduction in parts, just due to the unforeseen additional effort with the MOSFETs, and the fact that it's pretty hard to get decently matched pairs without buying two times the needed devices, so I feel that the market will bare this price. I plan on posting a graph for the p-ch parts sometime today and you'll see what I mean I want people to realize that these aren't just sub-par matches, but in fact are even better complimentary matches than the other sets, just not available in quads, which really makes this possible as they are drawn from the "tail" of the distribution. Please PM me if interested.

Looser101: not that it matters all that much, but is your order for 3 stereo amps, or one balanced and one stereo? Just trying group some of the harder to group transistors tonite and this would be marginally helpful

I think it can, depending on what you mean by "pass". If you're willing to hack the player a bit, I think it can be done. Search around at DiyA and see what model Russ and Brian hacked to do this.

final size

no, it's not black. I wish... I got it from onlinemetals, which admittedly doesn't have the best pricing available (Pierce Metals for example is usually cheaper on other items) but I needed a few other things as well...

Doug, for your original question, how about a 1000V 10A 400W DMOS device? http://ixdev.ixys.com/DataSheet/DS99529A(IXTH-TT10N100D).pdf

I wouldn't worry about those numbers. All that is important is that they are the same per quad.

they're selling fake ramen?

ok, thanks Maybe Chris needs to see if he has enough heater and real estate for a pentode CCS then!

$200 worth of perforated aluminum. 3003-H14 0.125" Thick with 0.125" diameter holes and 0.1875" stagger... 40% open. Seems to be real nice stuff after handling a sample, just kinda pricey.

ok, I apologize, my facts are wrong, but the question still exists

cool! So, since you have your own thread, Pars mentioned something about you saying that replacing a plate resistor in his Counterpoint preamp with a DMOS type CCS was a bad idea. I was wondering, why would something like this ever be a bad idea? I don't really know the circuit, but the question was asked in the general and this specific example was brought up as a counterpoint (heh) to why replacing a plate resistor with a solid state CCS wouldn't always be a good idea...

Depends how many cars I had bought in the past. I figure this is your first hi end audio purchase?

I have a strange question. I'm running to an issue paralleling four 2SK170/2SJ74 JFETs where the noise from the degeneration resistors is something I'd like to overcome. I'm wondering if anyone knows of a scheme where at most a single sources resistor is used (i.e. all the sources are tied together before this) and some sort of a a servo arrangement is used. I'm looking for a way to avoid super tightly matched devices as well. I understand the scheme used in the Xono and say the Vendetta phonostages, as well as a number of the Borbely designs, but these aren't exactly what I want. Feedback is acceptable as well.

hmmm.... just hmmmm....

yeah, that didn't come out right I'm not even sure what point I was trying to make either...

Just because a technology is used to cut a record, doesn't make it good. Case in point, inner grove distortion.

Source on hard to find parts? That's my specialty Two sources, both very reliable. Search Results LU1014D N-Channel POWERJFET Lovoltech 2pcs - eBay (item 220338538567 end time Jul-01-09 12:29:33 PDT) Also, I'd suggest trying the IXYS DMOS devices if you want to go back to that plan

so that's where all those diodes went

D:

just remove the mesh. Best mod ever.

sorry, right thread, but ambiguous post. Here's a schematic.

Doug, I have a considerable number of LSK170 that are already grouped by Idss. In general, they fall into the Toshiba "V" grade Idss classification. I'd be more than happy to ship you a bag of them and let you choose whatever pairs you'd like. Failing that, I have a considerable number of the Toshiba parts (both binned by Idss, and still in original packaging) that I could send as well. I use a similar topology with my NOS DAC, except using a eight legged devil instead of a transformer I guess I was referring more to this type of topologies discussed in this thread, but I appreciate the information about DC offset. I wouldn't have though about that diyAudio Forums - CHOKE Loaded MOSFET, easy to build - Page 1 I think you need your own thread around here, many people enjoy picking your brain about things In fact, your name came up the other day with respect to a CCS for Pars Counterpoint Preamp. Maybe a mod around here can make that happen (thread split)!

Congrats! I hope the ear burn-in continues to be so successful!