SMPS powered Tube Amp

[Blujay]

DCM critical mode is easy to control (single pole, no RHP) and has soft turn-on of switch. Turn-off transition obviously requires good layout and tight loop drain-rectifier-output cap. 48V supply itself sees no fast edges -- just soft ramp current

Simulation works if you have the bench experience along with

 

[Blujay]

Cheap

 

[jjasniew]

That's a manufacturer I'd trust over that other one I saw...

 

[dch53]

After my bad experience with a cheap resonant half-bridge converter for my stereo 300B amp I'm determined to build my own. I've attached a block diagram of what I have in mind.

The LT1248 PFC PCB is already laid-out and ready to be ordered. I'm currently working on the 24V flyback converter for which I'm hoping to take a shortcut and adjust a vendor evaluation board design.

 

[matejsirk]

I bought tiles:
https://www.aliexpress.com/item/100....order_list.order_list_main.11.fac6586aqe8Fbc

I used it in the amplifier:
https://www.diyaudio.com/community/threads/pp-amp-with-6e5p-en-pcc88.410958/#post-7646376

I don't see a difference between the classic (toroid) and this power supply. The only thing is that it has practically no noise.

I also bought 2 pieces (0-300V 1.6A):
https://www.aliexpress.com/item/330....order_list.order_list_main.41.fac6586aqe8Fbc

I plan to use them as a 0-600V stack, I haven't tested them yet.

 

[jcalvarez]

I also bought 2 pieces (0-300V 1.6A):
https://www.aliexpress.com/item/330....order_list.order_list_main.41.fac6586aqe8Fbc

Oh, never saw that one, interesting, please let us know how it goes, thank you!

 

[Blujay]

Nice!

 

[Jah Kreator]

Am thinking of doing the same for a high power QTL,,,,Allready got two for the filament supplies....16 x 6c33cb...constant current and voltage promised by the modules, it crossed my mind re stacking...will now join in with this....need 170 volts pos and neg at 2 amps....wish me luck