Tuesday Tube : 10 Raytheon 4-Pillar
Another version of 10 tube with Oxide-Coated filament. One of the best design and supported structure. Raytheon 4-Pillar series...
Read More
Monday Modify : Revise PreAmplifier for F2a Push Pull Amplifier
Having plan to change components for my 210 tube PreAmplifier. Want to make more transparent to F2a Push Pull...
Read More