I've been looking for a tube tester for a while, and my options were: Buy an old tube tester. It would need to be calibrated, and I don't know who are the reputable sellers. Prices varied a lot -- this option is basically a crapshoot. Buy an Amplitrex. Good but very expensive -- about $3000. Build one. The two primary options I found are the uTracer and the eTracer. I opted for the 3rd option. The eTracer is a more complete kit with well-supported software. The only issue is that I didn't own a Windows machine. The eTracer with case, power supply, an extra top plate that I needed for 211 tubes, and shipping costs $1250. I opted to buy a Lenovo laptop during black Friday sales. The combo ended up costing me <$2000 (side note: I've been a mac user since 2003 -- Windows has come a long way, and I'm preferring this machine over my mac). First tube I tested after completing the build: Parts Here are the parts I ordered from the site: PC control software $500 Built and tested PCB: $350 Model-01 chassis with accessories: $200 Extra Top-B-3 blank top plate for customizing sockets: $20 Mean Well EPP-200-27 internal power supply: $30 + Shipping $80 and PayPal fees $70 While it comes with all the tube sockets, I decided to replace the Octal and 9-pin miniature sockets with NOS ones I had at hand. I wish I had UX4 and UX5 NOS sockets that fit the existing openings on the top plate, so the ones provided would have to do (they're fine -- in retrospect, I needn't replace any sockets). There are some extra parts that are needed besides what comes with the kit. Below are the parts and links to the ones I bought: Screws/nuts for mounting the sockets: https://www.amazon.com/gp/product/B07W4CW91J 5mm×20mm slow blow fuse for AC mains ([email protected]): https://www.mouser.com/ProductDetail/littelfuse/0218002mxp/?qs=rkYlxpo0zrHcKzzUL2%2bKcA== Crimping tool: https://www.amazon.com/gp/product/B01N1RFZZ4 (optional) Spades for power connections: https://www.amazon.com/gp/product/B01M6ANEHI USB B to A or C cable and power cord. I already had a soldering iron, solder, silicone, (optional) heat shrink, (optional) techflex, (optional) heat gun. For silicone in builds, I use RTV silicone. The kit comes with 600V stranded Teflon coated wire. The wire is high-quality, but I prefer solid wire for point-to-point connections. For that I use Belden milspec 1kV wire. Finally, I use 311B tubes, and I needed a connection for the grid cap. I already owned a ceramic tube cap, and I appropriated a banana plug for the terminal connection: To be continued with build, tests, and a tube configuration file.