Hi Dan,
Looking at your RF Sweeps, it seems to me that your first section of L12 is right on (20m sweep), that the tap between 30 and 36 might be off by one turn, but not enough to warrant removing and rewinding.? Note that 30 meters is low, indicating that there may be a turn too many on the second winding (19 to 30), and 40meters is too high, meaning a turn too soon for the tap.? If the tap were moved, it would most likely move the pass bands correctly.? Again, not something that I would do as you will not notice any difference in the receiver.
I am less sure about the 80 meters sweep.? It does not show enough inductance on L12, though the dip does not indicate an L12 problem.? I would recheck the 80 meters low pass filter (LPF).? ?Count turns on the two inductors and verify the capacitors are correct.??By chance, have you verified the LPF filter selections testing that only D1 and D4 are on?? ?The other 4 should be off.
The above is my interpretation of the information.? It could be wrong, so please verify and get back to me with any errors.
73
Evan
AC9TU
