64!!! Just the heater puts out 30 watts a tube. That's 2 kW right there and we haven't even turned on the plate supply....
I suppose it would be a good idea if you wanted to run a steam plant or a glass-blowing facility or maybe even if you owned stock in the electric company...
I bet it sounded great before you ran from the room screaming, with thermal burns on the exposed parts of your body!
I suppose it would be a good idea if you wanted to run a steam plant or a glass-blowing facility or maybe even if you owned stock in the electric company...
I bet it sounded great before you ran from the room screaming, with thermal burns on the exposed parts of your body!
They were toasty. 32 tubes (64 sections) per side. The CCS loads (2SJ49) pumped out a few BTUs as well. We ran them for a total of 40 minutes as a demo for the editor of Audio Update (that dates me!), then never again. He put a photo on the cover and actually treated it seriously in his article.
I still have the tubes, the FETs, and the chassis.
I still have the tubes, the FETs, and the chassis.
I think AMR said it better, there's the bespoken and there's the rest of us. Everything the rest of us is doing here is mid-fi, a pointedly arrogant comment?
That was my gf's nickname. This monster just about peeled the paint off the walls- the amp, not the gf.
Scott, there is a difference between 'mid fi' and 'high end'. Charles and I tend to design 'high end' and are proud of it! We get laughed at here for doing it, but we are proud and competitive anyway. Congratulations, Charles for getting an 'A' rating this month on your new preamp in 'Stereophile', AND it's cheaper than the JC-2 as well. Just wait! You have my 'blood up' now! Now, I will have to recall a JC-2 and see what can be 'improved'. Servos come to mind. 'Keep on Truckin'
If I'm not mistaken, you built a homebrew discrete JFET phono stage with zero feedback one time. I guess you don't use it any more as you have likely switched to digital.
But if you still have your vinyl rig, try comparing your own ancient device against the modern IC's that ADI sells. Then tell me that op-amps aren't mid-fi. If I'm wrong, ADI will sell a lot of IC's this year...
Just as I don't understand "high-end" designers that put pre-packaged class-D modules in their power amps, I don't understand why someone would use pre-packaged IC op-amps in other parts of their system.
Well, I have to take back part of that last statement. I actually do use 3-pin voltage regulators, because they are cheap, simple, and easy to use -- but only for non-critical digital circuits such as the display or the display uC. If I ever start running them in critical applications, you can take away my "high-end" license and issue me a mid-fi citation.
But if you still have your vinyl rig, try comparing your own ancient device against the modern IC's that ADI sells. Then tell me that op-amps aren't mid-fi. If I'm wrong, ADI will sell a lot of IC's this year...
Just as I don't understand "high-end" designers that put pre-packaged class-D modules in their power amps, I don't understand why someone would use pre-packaged IC op-amps in other parts of their system.
Well, I have to take back part of that last statement. I actually do use 3-pin voltage regulators, because they are cheap, simple, and easy to use -- but only for non-critical digital circuits such as the display or the display uC. If I ever start running them in critical applications, you can take away my "high-end" license and issue me a mid-fi citation.
Thanks, John. Do you want me to twist the knife?
The K-5xeMP is made in the US with a US chassis, US transformer, US PCBs, Roederstein resistors (actually Beyschlag now...), a mix of Wima and Rel-Caps. The only thing from the Far East are the RCA connectors we have custom-made for us there. Oh, and the Toshiba JFETs!
In the immortal words of "W"..."Bring 'em on!"
YouTube - President George W. Bush Says "Bring 'em on"
(Also known as, "Servos? We hain't gotch no servos...We don't need no servos...I don't have to show you any steenkin' servos!!!")
YouTube - We don't need no stinking badges!
I do
Maybe that's my pro audio background showing though - console designers use rather a lot of opamps, and for power consumption to go up a factor of 10 would be a complete no-no. Its already tough enough keeping heat under control.Sometimes I do wonder if Apple really is the canary in the coal-mine.
I dunno what a 4" or 6" fab is but I did not notice a changed noise spec in the AD844 dataheet.
I also noticed the reduced power consumption trend.
With 4 ICs in my DAC and a 30 Watt power transformer it's hardly relevant.
In fact we just added a couple of rooms to our offgrid house and I'm fixing to set my rig up to transfer the rest of my LP's that can't be replaced. All battery set up, +-12V @ 250A directly from 25' of 0000 welding cable. Do you honestly think something like the AD8559 is not up to making a phono front end? I'll probably stick with a pile of JFET's, I haven't listened through IC's since Walt and I did the AD624 preamp in 1982.
Not much point in doing an A/B you guys wouldn't listen without peeking, too much to lose.
Ain't that just the truth?
'Never try to teach a man something when his salary depends on his not knowing it'.
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