New-York tribune., 1922-04-02

your letter state what your troublc |
's' what kind Of apparatus YOU are
using and any other facts you think |
necessary. II YOU desire to install |
receiving set and need advice
write to the Tribune Radio. stat;nr
whether you live in an aosrtmcnf |
or a private house, and If outside
the city your distance from New !
aork Questions.of general interest |
Will De answered in this department !
every sunday. Requests for personal |
answers should be accompanied by |
a stamped and sels-addressed en-
velope.
you can. The set should work per-
fectly.
Z. h. NJ, Of Stamford, Conn. sends
in tip which may prove useful to
other readers. He erected his aerial
between two trees and IN describing it..
said: on may be interested to know
the way | solved my trouble from
trees whipping in the wind and break
ing my wire. On the end of each aerial
beginning at The insulator attached
about fifty feet of cotton rope clothes
line and ran same through pulley on
each tree and down to heavy weight
This allows the tree to whip all it
wants to in the wind and the rope and
the weight keeps the antcnna tight at
all times and I have no more broken
wires"
Long Aerial Doesn't Help
c. r. S., New York.
o. now have a tWo-wire aerial
With a stretch of 100 feet and about
a 50-feet lead in around tho house. By
getting my neighbors' permission be
lievc 7 can get stretch of close to
ESQ feet. Would it be better for re
ceiving only to use ono wire OF would
more than one be better for the pur-
pose? Is it correct that tho bigger the
aerial the better the reception will be.
aerial should not be too big? Could
use the pieces of my present aerial
soldered together, for the longer
stretch.
A
ent is of maximum length for good re-
ception Of music and speech broad
cast on short waves. A single wire
aerial is just as good for reception as
a multi-wire aerial, and does not bring
in so much spark interference. 1t IS
not true that the bigger the aerial the
better the reception will be. The big
ger aerial is only useful for long wave
signals. A long aerial can be used, Of
course, for short wave work, but it
means you would have to put a large
condenser in series with it to cut its
capacity down, and that is not so cf-
ticient.
C. S., Plainheld, N. J.
o. have loose coupler, fixed
condenser. crystal detector and a
pair of 5000 ohm telephones. | am ex-
periencing some difficulty in hooking it
up correctly.
A.--Join your aerial to one terminal
of the primary of the loose coupler,
and your ground to the other terminal.
Next connect wire from one terminal
of the secondary Of the loose coupler
to one of the terminals of the crystal
detector. Upon the other terminal Of
the dctector connect one terminal OF
YOUR telephones. The remaining ter
ninal of the telephone should be Joined
to the remaining terminal of the sec
ondary of the loose coupler. Now con-
meet the fixed condenser across the two
terminals Of your telephones, and the
set will be ready to operate.
Can't Sell Regcnerative Set
e. ". S., Long Island.
Q.-Will l be infringing any patent
if I make up a regenerative set accord
ing to the diagram printed in your
papero am very handy in assem-
bling electrical devices, and have op-
portunities to sell my handiwork, but
I do not want to commit an illegal
transaction.
A.-Yes, you would be infringing the
Armstrong patent if you manufa ctured
or assembled the parts Of that set for
sale.
w. B. H., Danbury, Conn,
Q.-What precautions must be taken
against thunderstorms?
A.--You must either use single pole
double throw switch to ground Your
aerial when not in use, or else install
one of the protective devices that have
! been passed upon by the National
Board Of Underwriters. The latter are
better, as they protect you even IN the
event you forget to ground your aerial.
S. S. S., Henderson, n. c.
Q.-I have a small theater, seating
about 400 people, please advise if radio
outfit would be satisfactory for enter
tanning patrons in this size house by
using the amplifer"
A.-Not until some broadcasting sta
ton commences operation closer to
Henderson than at present. For the
purpose Of using the radiophone for
the entertainment OF q theater audi