In a message dated 99-03-16 04:12:23 EST, you write: << 803 > 811 > 811a > 813 > 833a > Are there any other tubes that are popularly used for tube coils that I > should be an eye out for at this hamfest? >> Jeff, The 304TL and 304TH, 838, 845, 4-1000, 3-500Z, 4-250A, 5868, etc., are good. Just about any large transmitting triode, tetrode, or pentode, will work. Also industrial tubes for induction heaters, etc will work. John Freau