Additional Experiments with Impulse Excitation

After drawing a definite distinction between "impulse excitation" and "beat excitation," the writer considers broadly the conditions under which each of these is brought about. In connection with a type of impulse excitation transmitter, there are considered the effect of a hydrogen atmosphere in the gap, the construction of the necessarily closely inductive coupler between spark gap circuit and antenna circuit, the effect of gap separation and "wandering" of the spark, and the effect of the tone circuit shunted around the gap.