I have a Tempest MKI. Have been using Electro Hamonix tubes without problems for years. I bought a quad set of Gold Lions and they showed red plates after just a few minutes. Everything measures correctly per Rogue and I have checked every resistor around the tube sockets and they measure within tolerance. Cathode resistors are showing about 55 Volts droped across 660 Ohms for 83 milliamps. I tried adding resistance to the Cathode as high as 990 ohms without success. Any similar experiences? Rogue recommends I upgrade to the MKII. Anyone want to donate $1K?
