Is there any 50W 300B SET monoblock out there?

Wrm, about 180lbs per side. The output transformers weigh 62lbs each.

Here's a pic of the OPTs before potting, with an ECC83 tube for reference:

OPT Core

Rodman, I was pretty much answering this statement by Brf:

"What you need is a tube manufacture to manufacture a more powerful triode tube."

Just letting ya know it exists already...

Thanks Granny, WRM and Rodman...It took me a year of careful planning and building but I hope to enjoy them for the rest of my life.

I built an SET with 200WPC. It uses the 833C Directly Heated Triode tube. It sounds like an enormous 300B amp, with better bass, IMO.

Not commercially available, but it can be done.

The Midlife Crisis

Wrm57, how about peek underneath?

Underside

Jwm, thanks for the compliment but I'm not planning to make any commercially, for a few reasons. First, I have a demanding full-time job that I'd like to do for another 8 years or so. Second, the amps cost ~$12k just in parts, some of which are painstakingly hand made, such as the teflon tube mounts. Third, the plate voltage on the 833C is 2.3kV...I shudder to think of the potential liability lawsuits if a customer's dog, cat or child (or self) did something stupid.

That said, anyone near central NJ who is curious about the sound is welcome to visit for a demo. Just pm me to set up a listening session...but I won't build you one, that's up to you!