Since 1999, I have been writing detailed, schematic-filled articles on new and old tube-circuit topologies—all for free on my website, tubecad.com
. The new topologies have been for the most part my own creation. I have posted over 350 articles—once again, all for free for everyone. For each post, I don't just write text: I also draw schematics, create and run SPICE simulations, and answer email that results from the post. In fact, over the last 17 years, I have answered thousands and thousands of emails related to my posts.
If you enjoyed my writings or have built some of my designs and feel like giving back something to help me continue doing what I have been doing for the last 17 years, please think about supporting my efforts to further expand the world of tube audio by pledging as little as a few dollars per month to allow me to continue to do what I love doing and others love reading.