Has anyone modified the Drake L4B tuned input for 10 meters? My amp came stock
with 10 meters (an older amp) but the 10 meter input SWR is about 4:1 and
adjusting the coil makes little change. Looking around the net, it seems like
folks are saying that the Q is too high. (Hence the high capacitance on 10 and
15 meters)
I also noticed that the Heathkit SB-220 uses 1/2 as much capacitance as the
Drake on 10 meters. (And 15 meters too).
I’m going to change cable lengths between the amp and the Icom IC7200 to see if
that helps. SWR on 80-15 is great.
But I did have to turn the coils almost all the way into their forms on the
other bands.
Idea’s?
Thanks
73
Jim W7RY
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