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Debbie took me out for dinner at Maple Tree Inn, one of the best Cajun places in Chicagoland. Started with 6 oysters 2x2x2 - 2 Rockefeller, 2 Bienville and 2 Deviled. Then 6 grilled oysters. Then southern fried catfish with dirty rice for main. Debbie’s BBQ shrimp with cheesy grits. A wonderful dinner. Sent from my iPhone using Tapatalk

Got the filaments down to exactly 6.0VAC using 0.3R 5W resistors. B+ and B- are both solid now as well. +375V and -378V. About 0.2 drift over 30 minutes of warm up then stays fixed after that. Still comparing to my SRX and Carbon, but the sound is certainly glorious! I know, pics or it didn't happen. So.... Above, you can see that in order to make this fit in a 300mm deep case, I had to create 2 layers of boards. PSUs on bottom, Amps on top, with about 30-40mm of overlap. There was actually plenty of clearance and I could have moved them to overlap even more if needed. I was able to leave enough room in front for the power switch and future quad pot when it arrives. Please don't give me too much crap for the messy wiring. I plan to take it apart next week to add the quad pot and clean up the internal build a bit. I just wanted to prove to myself that it would fit! Also, notice that I am using the 755-SCT2H12NZGC11 as a replacement for the C2M1000170D for the PSUs. It appears to work just fine and runs cool. So we do appear to have a backup device for when the C2M1000170D SiC is out of stock. Also, in the front middle (under the mess of wires) is a timer delay for the CPC1117 HV delay turn on, as referenced earlier in this thread. I have it set for 60 seconds. Above with the tube cages. I have not install yet, but just wanted to see how they will look. That will be next week... And finally, sharing some room with my Carbon. Not pictured are my SRX builds (one mine, one my son's). BTW, so far, the BH runs cooler (both case temp and silicon temps) than my Carbon. Both running at 20ma.

Running like a dream now! Thanks mwl168 and sorenb for the fixes. I reduced the amp to +375v and -378v by overlaying 4M7 resistor in parallel to the 390K ones, and it is holding rock solid. Loaded or unloaded, same numbers. And with the 2R6 on the B- current limiter, it is handling the 135ma on that rail without issue. I did not have to change the B+ side current limiter. Frankly, I would never have solved the current limiter issue without your guidance, mwl168. Just spent about 10 minutes on the BH using some older Lambda Pro's that I use to test amps (if they get fried, I will not cry). Now to plug my 007's in and lose a couple hours of time....

Pig

In the beginning I soldered most of them. Worked well, but a bit fiddly with smaller connectors (JST XH/PH etc). Then I decided to buy one of these http://www.engineer.jp/en/products/pa09e.html and now I'm not going back to soldering anytime soon

In what universe is 1299$ for a pair of tubes "reasonable"? in Trump's where everybody is rich and beautiful?

Hi All.. I accidentally deleted the old thread just now, whoops! Can everyone post the boards they want here in this thread as I start over. I'll also inquire about pots from TKD through a US distributor. This was the old spreadsheet https://docs.google.com/spreadsheets/d/1Z1L3MQuuY4ZTUyPQb1qBmVJp8MtC7qEzBUui3z5dFrQ/edit#gid=0 Attached are all the boards except the unbalanced to balanced tube bottom mount Bridge_Vert.zip cfp2hmt.zip circlotronhvpowersinglenewver3swt.zip goldenreference6d.zip grhv100v.zip kgbhver6sbipolar.zip kgsshvpssicfetsinglenewleftfatsws.zip kgsshvpssicfetsinglenewrightfatsws.zip TKD 4CP 3 pot final.zip THAT340- SOT23.zip that340.zip THAT340-J109-K389-JFET.zip that340lsk.zip SuperSymmetryDynalo-TDK-v1-5.zip ubaltoblatubeschem2.zip gg.zip kgsshvcarbonv6ground2.zip

I finally got the Blu-ray set for this show (just watched the first 4 episodes). The sound design is by David Lynch... I'm not sure if people with TV speakers are getting everything out of the show. Has anyone else watched it yet? I'm surprised by how many actors Lynch was able to get back. There are some big-name stars, too, but I don't want to put too many spoilers in here.

Lazy Brunch

Happy Birthday, Mike! You and Deb, along with the rest of the Chicago crew, are some of the few things I miss from Illinois. Have a superior day my friend.

Collective stupidity doesn't make that price "reasonable" but I must accept your point. Sad days...

ECP headphone power amp - now that's the sex

Crazy tuberoller world...

Happy birthday Adam!

Happy Birthday!

Happy Birthday!

Happy birthday!

Happy Birthday

I never knew that Pavarotti got his start with the 5th Dimension.

Happy steak day Adam! Cheers!

Happy Birthday! Hope you're having a great day.

Happy birthday!

no issue running it a bit low, and leave it at that.

Tea and a Slice!

Happy Birthday!

secondaries are too low for getting 400V out ... try 375V rather ...lower the two 390k to 365k, or parallel to get there

Happy birthday!

Happy Birthday!

no current limiter, and less filtering ...if you don't want current limiter, remove 3904 rather

assume you GRHV voltage out is 390V under load and +404 and -410 without? what is the voltage at the drain of the Sic (middle leg) against ground? and what is the voltage between R9/R7? both with and without load

Happy Birthday!

Happy Birthday Adam!, and remember ...

Happy Birthday !!!

Thanks, everyone! Spent the day shopping for and assembling Billy Bookcases, but I’ll soon be headed to my favorite steakhouse in the City for dinner tonight to properly celebrate.

Which Antek did you get? 0.68V means it is hitting the current limit so you would have to lower the resistance a bit regardless.

The value needs adjusting not the wattage. Don't remember for sure but try 3R 5W or so. In a pinch you can parallel 2 5.1R to get 2.55R but it's a good idea to replace it with a value that's more appropriate for your application. Going by memory I think the B- on the BH draws around 140mA.

Not sure this is a factor but, the Blue Hawaii draws significantly higher current than the Carbon does, especially on the B- rail. If you are using the 5.1R current limiting resistors on the GRHV you will for sure have issue with the B- and possibly the B+ rail too.

Noticed that 4 x pzta06/56 chips are about same as a DIP-28 chip and I was looking for similar heatsinks. Short of ordering a minimum of 7000 from Mouser, I found these https://console5.com/store/dip28-heat-sink-glue-on-thermal-epoxy-style-dip-28.html So glad there are so many nostalgic gamers out there.

Just remember that Doug is a hard grader.

Can you put really loud speakers outside the SCIF?

Full English with roasted marrow bones and short rib bubble-and-squeak.

I like to run my filament 5% low, which is 6 volts. I believe David Berning, who designs for long tube life, likes to run his 12.6 volt tubes at 11.5 volts, and his 6.3 volt tubes at 5.7 volts, which is close to 10% low.

So the tubes you are using now are drawing 2.6A filament current per pair based on the measurements you provided. Since the filament supply is not regulated, subject to mains fluctuation and different tubes will likely varies a bit in their filament current draw. I suggest you make some calculation and set up the resistors to drop the filament supply under load to fall in a range you feel comfortable with. I have some high cost NOS EL34 tubes so I personally feel most comfortable having the filament be between 6 - 6.3v. And, by the way, I believe the filament current draw varies a bit from cold start to fully warmed up too.

So, I got my dad's UG back. I had asked that the case be cleaned up, but that the polish be conservative. In hindsight, maybe I should have asked for a bit more polishing, but the watch looks honest. I have it on a late 60's NOS Spiedel Teju-skin strap, with a correct UG gold filled buckle. The watch wears extremely comfortably, and has a totally different flavor from anything else I own: I'm very glad to have it, both for those reasons and that it connects me to a period of my dad's life that I know very little about, even if just tangentially. Sorry for the slightly out-of-focus wrist shot.

you need > 6.0V, 3x 1ohm might get you there, else use 4x

Other BH working !! I think that 5,5Vac is low. 6Vac can be right. You can try with three 1R in parallel (about 0.33R)

Congratulations! I think the 5.5v is too low for the filament supply for the EL34. This is an often debated topic whether lower filament voltage is beneficial or not but I think most believe it should be within 10% of the 6.3v.

Replacing the USB is pretty straight forward. Only removing/assembling the Yggy case with its plethora of screws can take some time. Gotta send in your Yggy for the Analog 2 upgrade. It’s more than just the replacing output PCBs. They also update the DSP firmware to deglitch the original Megaburrito digital filter, and add/replace/rework parts to upgrade to the current production configuration. They have learned some things to make it sound better in the 3+ years it’s been out. Sent mine in yesterday. We’ll see how it turns out.

first crack at stroganoff. missed slightly on some underlying flavors (pinch too much brandy and dijon), otherwise loved it and inhaled my helping and the wife’s leftover sirloin.