Pars

This appears to be the same case here, as the duals were implemented using individual TO-92s rather than the 7-pin dual socket. Spacing between the pin rows is not high enough to support sockets of any type. Pad sizes and shapes are also on the small side. I prefer elongated pads on transistors, for example. I'm looking at the dynafetr files using external heatsinks.

I'll need to take a look at the board files (I assume Gerbers), and think from what I have read that the Toshiba FETs, external heatsinks (dynahifetrhs.zip) is the one I want to look at? As for the schematic, there is a pair of devices in it... these double to 4 total, the additional pair in parallel with the existing pair I assume (including addl drain resistors (is that the right term))? Dual parts: thru matching, I think you can get better matches than the duals give you... one of my duals has to be 20% off in matching. For the dual BJTs, would something like 2SA970/2SC2240 be a good substitute? A couple of requests on the boards: I always felt the pad sizes on the Dynalo/Dynahi group buy boards were too small, making soldering connections to the ground plane or power planes difficult, and making desoldering from these same areas really hard. Secondly, the footprint used for the dual parts on the Dynahi boards did not allow the use of Zip sockets to socket the devices. The Zip sockets I feel are a must to allow, even though we will be using pairs of single devices here. Like I said, I'll look at the gerbers.

Tried 2 different browsers... nada. As for BOM, is http://gilmore.chem.northwestern.edu/dynagbffet.gif this the only schematic available? This only shows a single output pair. Someone (j4cbo?) on the headwize thread had done a schematic and several board layouts (Eagle), but they aren't available any more.

No. I didn't see the image(s) he referenced previously either.

Oops, copied wrong post for list: luvdunhill - 8 - 4 Asr - 0 - 4 Stretch - 0 - 4 looser101 - 4 -2 PFKMan23 - 0 - 4 Naamanf -? - 4 Icarium - 0 - 4 Dreadhead - 0 - 4 n_maher - 4 - 0 Digipete - [8-12] - 4 grawk - 4 - 4 Pars - [8-12] - 2

As Nate said, oh frack it: luvdunhill - 8 - 4 Asr - 0 - 4 Stretch - 0 - 4 looser101 - 4 -2 PFKMan23 - 0 - 4 Naamanf -? - 4 Icarium - 0 - 4 Dreadhead - 0 - 4 n_maher - 4 - 0 Digipete - [8-12] - 4 Pars - [8-12] - 2 Willing to help build, match parts, etc. Anyone have a BOM for this? I notice one on Headwize done in Google docs, but it seems to need updating (which I can do??).

More like this? no handles

HiFi2000 Pesante Dissipante modushop.biz

Happy Birthday!

Faith No More Epic (Live on SNL) Music Video on IMEEM Video@@AMEPARAM@@http://media.imeem.com/v/Rw85f8UAqK/aus=false/pv=2@@AMEPARAM@@Rw85f8UAqK

Hang in there guys. Once they are on antibiotics they seem to kick in fast. Both my sons get ear/sinus infections (even at 18 for oldest). Then my wife will get it. Me, never for some reason

Continued on and made second mistake on a -42dB one... oops I didn't try any of the others.

Did the pop music w/HD201s and made first mistake on -45dB.

Much of the verbiage on the Burson site, as well as the Audio-gd site, is audiophool bullshit. Burson dismisses opamps for being based on a single silicon strata, which in reality is as much of their advantage as is their disadvantage. Use of a single strata can accomplish much tighter thermal bonding, and achieve much more closely matched device characteristics than is easily accomplished in a discrete design. I'm certainly not adverse to discrete designs; it is what I use in my CD player for I/V rather than opamps. Touting a discrete device, essentially based on opamp topologies and yet not documented (specifications) thoroughly as any opamp would be, as being the ideal component for any opamp application is asinine.

Interested, but kinda blowin all my play money right now on another dyna creature.

Well, it was a good game, marred by some really stupid penalties. Congrats Steelers!

Gotta root for the Cardinals... Kurt Warner bagged groceries for my mom

Yes, but whose Opinion and Experience is he referring to? Filburt's? I don't think I would go there...

Andreas Kapsalis Trio

Happy Birthday!

Wiring proximity to the transformers can be a cause of this, usually the input wiring, pot, etc. On this amp, it appears that the wiring from the input PRCa comes around the left side of the chassis (behind the board or terminals with caps on left amp wall) to the pot, which is about as far away from the transformers as you can get in this. The output jack is very close to a transformer however.

A SumR transformer...

Very nice! You decided to go Khatargo? What did you do with the Stratos?

Hehe... that's more than I've got, tho I've always meant to build one of those. Made me a little nervous firing up the counterpoint PSU after rewiring the umbilical

Hehe... that's more than I've got, tho I've always meant to build one of those.