The Hope pioneer., 1922-11-09
THE HOME RADIO
How to Make and Use 80 B,AHYArT vERRnL
XIV. USEFUL THINGS TO REMEMBER


That crystal detector set is never
as efficient as vacuum-tube set, no
matter what sort of equipment you
use.
That crystal detector set cannot
be satisfactorily ampli6ed.
That most small or cheap sets can
not tune out local interferences.
That grid-leaks are not used on
crystal detector sets, but only on
vacuum-tube sets.
That large tuning-coil with wires
spaced closely will give better results
than short coil or one with wires
far apart.
That vario-condenser and loose
coupler gives finer tuning.
That vacuum-tube is about thirty
times as efficient as crystal detector.
That wave length has little to do
with the distance you can receive.
That 5000 ohm receivers will often
raise cheap set from inefficiency to
excellency.
That loading-coil is not needed
with loose-coupler and variable.con-
denser. q.
That If two or more crystal sets are
used on one aerial only one can be
used at one time and switch must
be provided to throw sets out and in.
That loose-coupler Is better than
tuning-coll.
That loose coupler should be
placed between aerial and ground.
That money saved in buying cheap
thrown away and that great deal
depends upon the phones.
That aerials and lead-ins should be
shunted across head-set.
That in setting up an aerial one long
wire is better than many shorter ones.
That the leadin counts and long
lead-in is an advantage.
That aerials and lead-ins should be
insulated from everything else.
That aerials should be placed as
high as possible.
That when placing aerial near ele,
waited structures, wires, bridges, or
steel buildings it should be placed at
right angles to them and as far away
as possible.
That strand, phosphor-bronze wire
is the best for aerials, but ordinary
No. IA copper wire will do.
That continuous waves penetrate
everything
That the lead-in from aerial should
be at end of aerial which is towards
I'M
wish to hear
That aerial does not have to be
horizontal
That for sending, many-wire
aerial is far better than single wire.
That counterpOise is better than
ground particularly In sending.
That an indoor wire will serve for
an aerial, but is not so good.
That an iron bedstead or springfield
will do for an aerial in case of neces-
sity.
That the simplest and cheapest
vaculun-tube receiving set is better
than the best crystal set.
That the hest form Of receiving set
is the regenerative set.
That vacuum-tube or regenerative
set may he amplitied to almost any
extent.
That an ordinary phonograph horn
attached to a head telephone receiver
will increase. the sounds somewhat
and will act as loud speaker.
That a variable-condenser helps fine
tuning
That the flament battery of
vacuum-tuhe set may be a dry bat
terry, but that 1t is more expensive
in the end than storage battery.
That the Ultra Audion circuit has
the plate circuit led back to the honey
comb-coil and amounts to a regenera-
tive set.
That the best type of vacnum-bulb
receiving set is the regenerative with
anplifiers.
That each step of amplification re-
quires another tube.
That if there are too many turns
on the inductance they may be taken
off to secure tuning.
That the distance you can receive
depends upon various climatic and
other conditions.
That the tilament lighting does not
always mean the set is operating prom
erly.
That if filament rheostat Is turned
on suddenly the filament may be
paralyZed and must be left to recuper.
ate before it will glow.
That burning the tilament too bright
ly merely wastes the flament and
shortens the life of the tube without