Had a question about the L7 with 10 meter coverage, either the export version or the modified/upgraded version. The 10 m coverage is achieved by adding a couple of 68 pf capacitors, aligning an input coil, etc. Does anybody know the theory or philosophy behind this design? Electrically, the same thing can be achieved by using just a single 68 pf cap on the S1A input switch, the side going to the RF input, and then short the 10 m and 15 meter contacts together. The output side of the input pi-network then functions the same as if two caps were installed, one for 10 m, and one for 15m. There is no need to put the other 68 pf cap near coil L4. Since companies try to save pennies on parts, plus labor costs, I was wondering why Drake went to the extra trouble to use this design. I'm sure there is a reason and, inquiring minds want to know...
Enjoy those Drakes. 73, Evan
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