RF amplifier two 813
15:47
Testing 813 valves.
15:27
Basic thoughts on Tube RF Amplifier output ' Tank' circuits.
16:01
813 verses four 807 valves for mitters
9:18
10-Meter Grid Driven 4D32 Amplifier Part 1
5:51
Project 78: LTC6090 Op-amp and 2SC5200N in a Quasi-complementary Topology Audio Power Amp Project.
19:17
DC Heater Supply for Valve Power Amplifiers
23:02
30 - RF Power Amplifier
4:59