I've just gotten this nearly mint and hardly used FL2000 for a song. The original 6KD6's are nearly new but I would like to keep them for my great FT-501 with CW filter and very tired finals. Is ther
Dunno how feasible a voltage doubler and a couple of GI7B tubes would be. The tubes are cheap and it would be an interesting project. 73 and good luck, Alek VK6APK At 05:27 AM 26/06/2004, donii@sympa
Somewhere there is a website giving details of substitution of single transmitting tube into FL series amp. 73 Barry end Barry Kirkwood PhD ZL1DD Signal Hill Homestay 66 Cory Road Palm Beach Waiheke
Doubling the HV will demand changing of many capacitors and the Pi net parts. But at 1200 V a pair of GI7B will put out 400 W, three - 600 W. The original Pi net will do the work. 6KG6/EL519/6P45S is
Maybe go to (4) 837's or modified 1625's. Not as much power ( they were really pushing the sweep tubes anyway). Look at the LA-400 amplifier made by P&H on bama.sbc.edu. ( no www). 1200 volts is just
In fact you could bias the grids for AB1 and cathode feed (4) 4x150A or 4cx250b and get extremely low distortion due to the very low grid current drawn. But you will need bias supplies. And reduce fi