By Wilfred N. Caron
Antenna Impedance Matching is definitely written and paired to its target market. using graphs is great. The charts are invaluable. The reader can learn how to fit an antenna utilizing this booklet. guides from the ARRL are consistently a discount.
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Extra resources for Antenna Impedance Matching
Consecutive repetitions of C-_ or C-x u undo earlier and earlier changes, back to the limit of the undo information available. If all recorded changes have already been undone, the undo command displays an error message and does nothing. Any command other than an undo command breaks the sequence of undo commands. Starting from that moment, the previous undo commands become ordinary changes that you can undo. Thus, to redo changes you have undone, type C-f or any other command that will harmlessly break the sequence of undoing, then type more undo commands.
Some ASCII control characters have special names, and most terminals have special keys you can type them with: for example, RET , TAB , DEL and ESC . The space character is usually referred to below as SPC , even though strictly speaking it is a graphic character whose graphic happens to be blank. Some keyboards have a key labeled “linefeed” which is an alias for C-j. Emacs extends the ASCII character set with thousands more printing characters (see Chapter 18 [International], page 207), additional control characters, and a few more modifiers that can be combined with any character.
Also, if any subprocesses are still running, C-x C-c asks for confirmation about them, since killing Emacs will also kill the subprocesses. If the value of the variable confirm-kill-emacs is non-nil, C-x C-c assumes that its value is a predicate function, and calls that function. If the result is non-nil, the session is killed, otherwise Emacs continues to run. One convenient function to use as the value of confirm-kill-emacs is the function yes-or-no-p. The default value of confirm-kill-emacs is nil.