The Washington herald., 1922-04-08
Questions and Answers
Aerial. and Hoek-ups.

Aeriais and Hoek-ups.
Q. a. Which is the best type. a
cage or spiral aerial?
b. Are honeycomb coils superior
to a receiving transformer? g..
C. What phones on the market are
the most efficient and reliablel
d. Which crystal hook-up in Mr..
Perezo's catalogue Is preferable?
e. Is II practicable to have an
aerial switch so connected that any
number Of aerial wires~can be cut
in? -
(. What would be the effect of
idle aerial wires? rE . H. .
A. a. Cage aerial in general Is the
best. y.,
b. Honeycomb coils In general
have given the best results.
C. This is a matter OF personal
opinion. The following phones are
on the market: Brown, Baldwin.
Western Electric, Federal, Brandeis,
Hotter Cabot, Murdock and others.
The phones named have given satis-
factory results. II Is generally con-
ceded that Brown phones are most
sensitive to weak signals. Baldwin
phones enable you to hear strong
signals loudest. F- .rvst
d. You will have to supply partic-
ular catalogue you refer to and
whether for transmitting or receiv-
ing circuit.
e. Yes. .. --.
I. None, IL grounded.
Previous Edition.
Q. a. In The Herald Of March 6
you published plans for a receiving
set. Can this set be used for re-
ceiving radiophone messages?
b. Please publish q diagram of a
radiophone receiving set. using a
double slide tuning coil. A. L. T.
A. a. Yes, that was a crystal set
described. but under good conditions,
and in the absence of interference
you could receive local radiophone
messages.
b. The diagram you desire will be
published in the near future.
NAA Deteetor Battery. -
Q. a. On what wave length does
the Arlington radiophone operate? =
b. What plate voltage does the,
western Electric detector tube re-
quire? HES.
A. a. The Arlington radiophone Is
being used for test purposes only
at present. Hence there is no fixed
wave length nor broadcasting sched-
ule.
b. Western Electric ". T. I, 1922
volts for detecting.
Local Effects.
Q. a. Kindly tell me why I am un-
able to hear WJH on Tuesday and
Thursday, and the, Church Of the
Covenant? j hear WPM. NoF and
WWX plainly. 81. - =
time ago and have not seen the
answers. w.MB.
A. a. Either you were not tuned to
right wave length or other stations
were not sending -
b. Questions are answered
promptly as possible. I do not know
the particular questions you refer 70
but have no intention of failing to
answer and would appreciate your
submitting them again. Some oues-
tions requiring diagrams will nec-
essarily be delayed due to the fact
that more time Is required to pre-
pare diagrams for publication. For
this reason the following persons
VIII be answered in the near fu-
ture: CHR W.A.F., H.H.O., FED,
AE., and M.B.C.
-, Receiving Range.
Q. (a) Would 1T be possible to
hear Newark with one wire aerial
900 feet long, 30 feet high. medium
sized loose coupler, 1000 ohm phones
and vacuum tube detector? 80
(b) Could hear Washington sta
tions with the above equipment5
(cl-Could 1 hear Washington II I
used a crystal instead of the Y. IT.
tube? H,H-H., Manassas, va.
A. (a) II might be possible under
good atmospheric conditions; unless
your set is sensitive, you could not
depend on It.
(b) Yes. -
(c) Yes.
Diagram Needed.
Q. (a) In the detector OF an
Armstrong triple circuit regenera-
tive receiver would II be more ad-
visable to place the A battery In
series with the circuit -or leave 1t
out?
(b) Beside capacity effects, what
could be the cause Of such inces-
SAINT bowling in the receiver?.
J. T.
A. Will you please submit wir-
ing diagram of your set?
wifiaE Diagrsn- d
Q. ta)= Is, the enclosed circuit
suitable for the reception of music?
OBJ Will an iron plate about three
feet square buried make good
ground? CIV. j.
A. (a) Make the following
changes in hook-up: Inductance
lead 10 positives Of A battery vsri-
able condenser across phones and
B battery
Jsfb) "A water pipe connection
would maks n shetter GROUND