As requested, this is the support thread for my Zener Limiter boards. They are not available. Please don't ask for gerber files.
Black Market thread: FS: PCBs for TG1 Zener Limiter
Manual, updated 2019/09/30 (board revision v2.5): TTx Zener Guide
The guide includes BOM, schematic, an optional DIY PSU, general build and fine tuning instructions, a front panel design etc. - I will update that archive occassionally, when issues come up that I think are worth to be included or need to be corrected. Please make sure you have downloaded and read the most recent guide before posting here for support.
Feel free to also share stories and/or pictures of your builds, finished or while still in progress