184

WIRELESS TELEGRAPHY

Furthermore, in this case the occurrence of pure quenching action is of
course independent of the degree of coupling. The latter may be made as
high as the arrangement of the circuits permits.

*

FIG. 221.

E. L. CnAPFEE2 has succeeded in obtaining continuous oscillations with
such a gap,* in fact even with a frequency of about 3 X I06 per sec.

(X = about 100 m.). For this purpose
he so regulates his primary circuit and
his current supply that after say three
cycles of the secondary oscillations there
is a discharge of the primary circuit.
The first primary discharge excites the
secondary oscillations, which fall off
slightly during the next two cycles, but
are given a new impulse in the third
period at the right instant (in phase).

110. The Connections.—a. These are
in general the same for the WIEN trans-
mitter (Fig. 222) as for the BRAUN
transmitter. The antenna is coupled
either inductively or conductively with
the condenser circuit containing the quenched gap.171

But the degree of coupling, while it may be chosen between wide limits

* R. C. GALLETTi170a seems to have obtained the same result by means of a peculiar
combination of a number of condenser circuits and spark gaps which act successively
one after another.

FIG. 222.

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