The Washington times. [volume] (Washington [D.C.]) 1902-1939, 1924-03-19
z RECEIVING SETS
ON SAME AERIAL
Workable With 2 Circuits
Having Primary and Sec
ondary Winding.

Owners of radio sets often ask,
"Can l use two receiving sets on
one aerial?" Invariably they are
told they cannot, the replying
experts having in mind the fact
that both receiving sets were
to be connected direct to the
same aerial.
Two receiving sets or even
more, may be connected to the
same aerial but must be Undue
lively connected to get away
from interaction between sets.
After a little experimenting
with two receiving sets in the
one home where one member of
the family insisted on listening
to one station and another de-
string to listen to another sta
ton at the same time, the fol-
lowing scheme was worked out
quite satisfactorily.
1t works best with two cir
cults sets having a primary and
a secondary winding. The pri-
mary winding of each set is con-
nected in series with the aerial
and ground as shown in the
drawing. This primary circuit
is not tuned in any way, repre-
senting an untuned or a per-
iodic. If you have a single cir
cult set, a special winding will
have to be made over the tun-
ing coil to be connected in
series with the aerial and
ground. This winding to con-
sist Of six turns of No. 20 double
cotton covered wire.
With this arrangement it is
entirely practicable to listen to
two stations on different wave
lengths at the same time. When
both receiving sets are tuned in
on the same stations or same
wave length there will be inter
action between the sets and this
spoils reception.
These sets can be located at
various parts Of the house, but
it should be born in mind that
a long aerial lead-in (Which would
be the case with one set being
in one room and another some
distance from iU is not desirable,
as it tends to decrease the signal
strength.
The lead from one receiving
set to another should not come
near the ground. The best
scheme is to have both sets In
the same room and when teie'
phones are worn either station
NAV be listened. When loud
speakers are to be used. 1t Is
necessary to have the sets some
distance apart.
Sometimes n cystal get and an
audion set will work on the
same aerial when connected di
rect to ii but not so with two
regeneratiVe sets, for AS soo:1 ms
the regenerative stage is used
there will be distortion III each
receiving set.
II you have an outdoor aerial
and desire to use another set
in your home. the lamp socket
attachment Is a very good sub
stitute hook-up and has given
very good results. In fact. some
lamp socket attachments give
better results than on some
aerials. A good outdoor aerial
is the best collector OF radio
energy but some aerials are not
good ones and that Is why tho
socket attachment is Superior to
some l have used.
No matter what type oe aerial
is used for receiving purposes, II
should be kept in mind that the
easier you make it for the radio
~ - ~
better signal strength you will
get from your receiving set. Any
way that you can reduce the
aerial resistance will help the
radio waves to your receiving
set with just that much more
volume, and the larger your
aerial is, especially longer, the
more energy" it will pick up.