6021W High Gain Submini Amp

[Kaptinkangaru]

Greetings all, first post. Wanted to share my latest creation, a 1 watt amp using 3 6021W's. Topology is 3 gain stages into a cathode-driven tone stack, driver stage, and SE output. 12V in is converted to 6.3V using an LM317, and high voltage is provided by a Royer oscillator. B+ ~290V. Designed in EasyEDA, board milled on desktop CNC, 3D printed enclosure for power supply with fan for the LM317, jammed into a Hammond 5x4x2 enclosure. More pics and videos to follow, i seem to have hit the limit. Let me know what you think!

[Kaptinkangaru]

shot of the power supply, and one more glamour shot.

vids linked below, no clue if or how i might attach one:

https://photos.app.goo.gl/ru9Tx2R17fQfAPdY8
https://photos.app.goo.gl/6Y5zaPdXrrMERH6w7

[fossilshark]

Wow thats a work of art! How did you do the silkscreening on the board? I am very close to pulling the trigger on a desktop mill but getting silkscreen results like that seems to be tricky.

[Kaptinkangaru]

My wife has a ton of craft stuff, including a printer with sublimation ink. I print my silkscreen on it, and use a heat press to transfer the ink. If you've ever done a toner transfer for a PCB etch, this is about 50 times easier and more reliable/consistent.

[dogburn]

Looks great and sounds great. You get some Nirvana-sounding tones out of it.

[kagliostro]

Nice Job


Franco

[sluckey]

Multiple skills. I like that! 

[Kaptinkangaru]

Looks great and sounds great. You get some Nirvana-sounding tones out of it.

Thank you. I wasnt going for any specific sound, rather I was experimenting with how much gain I could eek out while still keeping things relatively tight. In my mind, its somewhere between an early Mesa and a hot rodded marshall. The tone controls appear simple, but offer a very broad range of sounds.

Multiple skills. I like that! 

Part of why I love this hobby, next skill to master is woodworking. I've got a few headshells to build. Have some nice exotic boards, saws, routers, jigs, etc.....everything but the expertise lol. Hoping the time permits this fall.

[sluckey]

With your eye for detail I suspect you will do well with the woodworking. Always count your fingers!