Hello all AMers. I did more testing on the 4D32 rig, I made a different pi net coil, out of 1/4 inch copper tubing, sure looks nice! I played around with the amount of turns, fine tuning things. I had used #10 wire on a form, which got slightly warm after extended testing, the new copper tubing coil stays cold.
The tubes seem to like higher voltages and lighter currents, although I don't know if I picked 2 good tubes, but the pair I have seem to run out of steam above 400 ma (two tubes), the current wont go much above 420ma at 700 volts. At 900 volts and 350 ma, I get more power out, and have modulation headroom. I don't think the 4D32 has loads of extra emission. I have to test things under modulation, but suspect the deck will run nicely at about 900 to 1000 volts and 300 ma or so, 200 watts out. I received my 14kv 1 amp diodes yesterday and installed them in the rd deck for the negative cycle loading. So the RF deck is done, on to the RF control deck. Brett N2DTS
