开云体育

Keith, you should be able to get a good 4 or 5 watts out on that band. Have you tried adjusting the lowpass filter toroid windings yet? I would suggest that you start with L3 and spread the turns as much as possible. If the power increases as you spread them and is still increasing when you get them spread as far as they will go, then remove one turn from L3 and check again. The best way to remove a turn is to heat the outer wire connection and lift it out of the hole. Then unwind a turn. Don't cut the wire and don't try to clean out the hole. Just tack solder the wire to the top of the board. If you have to remove another turn, do it the same way. When and only when you get them where you want them to be, trim the wires and reinstall. I usually just solder them to the top of the board instead of risking board damage trying to clean out the holes. Next, squeeze the turns on L2 a bit. If that increases power, squeeze them further until the power peaks and finally spread the turns on L1. In all cases, if the opposite happens when adjusting turns spacing just go the other way. You will need to play with all of them probably. Stop when you get to 4 or 5 watts. There is no advantage in going beyond 5 watts and it will only serve to shorten the life of the finals.