looking advice for 833 tube amp

[limwuilun]

hello everyone, I 've been a diyer when was young. Kinda paste and do it. Of cos gain some experience from learning on google. Start from pp amplifier to single ended. 300b,,,211 and 845 with 1850v HT... recently interested of 833 se...but have some issues.

Refer to the photo below, block A,,,,thinking of using ccs,,,40H choke or ccs 2a3 set at 40mA for ,,,4p1s set at 25mA,,,or maybe a pure resistor?And I have issues when using SMPS at heater supply cause buzz sound . This 833 with amplification factor of 35,,,I m wondering if can drive it with high voltage MOSFET solid state driver or not?

 

[Magz]

Lots of info here...

https://www.diyaudio.com/community/threads/the-midlife-crisis-my-833c-amp-build.232484/

 

[Parafeed813]

The builds by Magz and Reinout are great.
Do read up on these, as they talk about lots of things to keep in mind (besides the obvious: voltage).
You are proposing a fairly low HT (for an 833). This means you need more drive current compared to running them as high as Magz does.
A 2A3 or 4P1L won't do.
https://www.diyaudio.com/community/threads/where-are-the-833-amps.24424/
https://www.diyaudio.com/community/threads/tb3-1000-is-alive-european-833a.111971/

 

[grataku]

Lots of info here...

https://www.diyaudio.com/community/threads/the-midlife-crisis-my-833c-amp-build.232484/

-My wife, upon seeing the 833C triodes in person - "That's not an amp, that's a Midlife Crisis!"

-My reply, "Hey, it's cheaper than a Corvette..."

My wife counter, "a week in intensive care or a funeral are more expensive than a Corvette. Get the Corvette!"

 

[Magz]

The divorce was more expensive than all those things rolled into one, x10!
At least I got the amps and the house they reside in...and a new girlfriend, too!

 

[grataku]

Sometimes the best audio upgrade you can make is getting a divorce. Who marries someone that can't handle a couple of 833c anyways? 🤣