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Can't remember who posted the original BOM, don't think it was you. The Wima are pretty much the only ones that large cap in that small of footprint. Sent from my iPhone using Tapatalk

I'm curious why the BOMs I see show Elna Silmic caps for the 220uf caps on the PSU? Usually audio grade caps are spec'd for coupling caps (Pass seems to like them), but for a PSU? Some reason that I am missing? I used Pana FM/FR for the ones I built. Sent from my iPhone using Tapatalk Sent from my iPhone using Tapatalk

Probably should ask this in the GRLV thread, but I'm curious why the BOMs I see show Elna Silmic caps for the 220uf caps on the PSU? Usually audio grade caps are spec'd for coupling caps (Pass seems to like them), but for a PSU? Some reason that I am missing? I used Pana FM/FR for the ones I built. Sent from my iPhone using Tapatalk

Is it one of the Bulgin MP0045 switches? Latching? I need to get one, or something like it. I know Birgir was using switches from one of the PC modding places, frozenCPU. Sent from my iPhone using Tapatalk

Just had to try it to see if I remembered... NoNoNoNoNoNo And no way in hell that is filburt's doing. Sent from my iPhone using Tapatalk

or risk overheating the ban hammer

Same here. Single sided sandwiched with double sided blanks? I'll give you an A for creativity! I personally will stop at 2-layer, and commercial houses are so cheap anymore I don't bother with those

Would any of those handle enough current? Sent from my iPhone using Tapatalk

^ I like that phrase, Dan. Accurate Sent from my iPhone using Tapatalk

Happy Birthday!!! Sent from my iPhone using Tapatalk

Ahhh, makes sense now. Carry on

Looks really good. I like the case(s)... custom? Or off the shelf? Nice clean look.

A couple of things: A torroid transformer doesn't put out DC... it is AC Those SOIC adapters will be a nightmare if the opamps you replace the existing with are fast at all. What opamps are you replacing and why do you think they need to be replaced? FOTM?

What positive comments?

I don't think we got more than 2", if that, further west in Chicago burbs. Partly sunny and not snowing out here (right now). Robins are wondering where they fucked up, however

I'd wait til you hear from the chef...

Happy Birthday!

Payment sent.

Agreed, not worth messing with. EDIT: And I found out last night what you were talking about regarding the two DC offset pots Marc. I didn't realize they would effect the bias as well, and had one board biased >300 mA for a short time. Pulled the board and found I had one side at around 45 ohms (pot || 620 ohm R). I may replace one side with a 500 ohm resistor. This is the most stable wrt DC offset of any KG design I've built. Sent from my iPhone using Tapatalk

^ I knew I forgot something in that post... disposal of that crap

I dunno John, you do such shitty work... sure, I'd love it if you shared that

http://www.antekinc.com/as-0528-50va-28v-transformer/ Earlier in the thread (had you read it) KG said you need ~35V raw dc, so 27 * 1.414 will get you ~38V minus the diode drops for the rectifier(s). I haven't looked at the schematic, but assume a bridge, so -1.4V, so you are at about 32.6V raw DC. Might work. 27-28V transformer will get you closer. 28V Antek above would put you at (28 * 1.414) - 1.4 = 38.2V. It appears some have built this with a 25V transformer.

I figured that. Same with bipolars, normally. If someone had a matched set of these I might be interested. Should be a bunch of them out there. I know I got the set I am using from you, and had been going back thru the GB stuff and my email, but didn't find where I had talked to you about them.

Went back to the 10K/1K feedback resistors, and all is well again. I've been reading online (Cordell, IRC, others) regarding using parallel mosfets with no source ballast resistors. Nelson Pass has been talking about it as well (Burning Amp talk). I know the Counterpoint amps used to do this (and were criticized for it). This apparently is without really tightly matching the FETs, but the gate voltage/current must be matched well and the Vgs should be as well. I measured Vgs on this, and while it is matched well between pairs of devices (N-ch or P-ch), it is not between the two types. I don't see any example schematics around either. I wonder what would happen if I decreased the ballast resistors to something like 0.1 ohms...

What I/V stage is that? Sent from my iPhone using Tapatalk