Evening star., 1925-01-21
RADIO QUERIES

hAD1O VUENlCo
Radio Editor
Please give me the call letters OF all
stations in Miami, Fla. I'll. II. c., 1r.
There are only two stations in MI
ami, F7a-wQAM, q 1oo-watter, op-
Grated by the Electrical Equipment
Co., and WMBF. a 600-watter, on the
Fleetwood Hotel.
Radio Editor:
Please help me untangle the fol-
lowing facts: What are the call let
ters and wave length OF the station In
Plattsburg, N. Y. IL there Is a station
there? is there a station with the
call letters KFNU2 II so, what 10 its
wave length7 What Is the wave
length OF station KENO. the Univer-
sity OF Arkansas, Fayetteville, Ark. :?
j. S. WILSON.
Have no record of q station In
Plattsburg. The call letters KFNU
have not been assigned by the De-
partment Of Commerce. KENO trans
mits on a 263-meter wave band.
Radio Editor:
Your column Is very interesting and
l enjoy reading the experiences Of
others. I have a one-tube regenera-
have a good aerial and ground. Up TO
date I have heard 81 stations plainly
and clearly. and on New Year eve heard
three celebrations-locai, Chicago and
Denver. I get numerous stations
even when local is on.
am we'll satisfied with my set, but
I think it must be working overtime
because when put the phones to my
ears the other evening l heard local
- III lH
B batteries being attached. So / then
took out the tube and the music con-
tinued to come in as plainly as ever.
Can you explain this?--L VOGELS-
BERGER.
Your set 10 indeed remarkable. If
il was a reflex this apparent phe-
nomenon probably could be explained
but being Of the regenerative type
there IL nothing In II which could
possibly rectffy the incoming waves
when the tube is removed.
Radio Editor:
At sam. last Wedn esday q station
was picked up by me on two-tube
set, broadcasting a musical program
The first number caught vas selec.
tion by stringed instruments. fol-
lowed by a vocal number rendered BY
male voice. These were then fol.
lowed by what ! believe were pipe
organ and plano numbers. While each
selection WAS announced and the sta.
tion call given the reception was toe
indistInct to determine the call let
ters. II you can identify this sta
tion for me in your columns ! would
be greatly obliged.-R D.
The station you heard probably was
KSD, ST. Louis, transmitting Its 1s-
hour test program which began At 4
pm. Tuesday and continued to 10 a. n
Wednesday.
Radio Editor:
About 1l:15 o'clock while listening
to wRC, there came in quite clearly
the voice of q man at 3xAz calling
3ALR This was repeated several
times. Are these local stations? They
came in much clearer than VIRGO
D. THOMEN.
You must have misunderstood The
letters, as the Department of Com
merce has not assigned such call
signals.
Radio Editor:
AS am the user OF the phone call
Three Boy Sail Boy" which words
in the code universally used by Navy,
commercial and amateur radio men,
call, the letter OF F. F. Campbell in
The Star Of January 1s last evidently
referred TO me.
The words in question are used not
TO conceal my Identity but TO prevent
any doubt in regard thereto.
It was stated In Mr.. Campbells let
ter that the Interference came In on
different dial settings" and must
come from a very powerful station 81
In connection with interfer ence
emanating from my station, wish &c
explain that non-seleotive receivers
improperly built or operated recetv.
ers or receivers situated within a few
blocks Of a station like mine will
find 1t hard to tune out that stations
signals.
Realizing that fact, we are carrying
on a series Of experiments to over
come this trouble, and, pending sue
cess In doing 80, we have maintaine ed
the policy OF remaining silent every
night from 8 till 1880 and during
church services and the Roxie pro.
grams on Sundays. II my call is ever
heard during those periods IL Is not
my station, but some wildcat"
hold a hrst-class commercial H.
cense and an amateur extra FIRST.
grade license from the United States
Government, and the two operators
who frequently help me are also
licensed. My station is inspected
periodically by Federal radio super
yisors and licensed by the Depart
ment Of Commerce.
The usual wave for c. W. telegraph
is in the band between 10 and 81
meters. The phone set worked nrs'
on 1Se and later on lSs meters We
own q wavemeter calibrated at the
Bureau Of Standards and checked
every few months against the meter
carried by a radio supervisor. We
strictly observe the rules OF the De-
partment Of Commerce and the Amer
loan Radio Relay League for the
conduct and operation OF amateur
radio stations.
/ listen In occasionally on broad.
cast wave lengths and seldom have
trouble with amateur interference
do, however. notice considerable in.
terference at times from Government,
stations handling important messages
and communications to ships at sea
These are probably the source Of part
of Mr.. Campbell's trouble. II broad.
cast listeners in general knew The
code they would not make the same
mistake as Mr.. Campbell and believe
reference received "on the same dia
setting was traceable to the same
source.
The amateur, as a rule, 10 only too
glad to help any broadcast listener ir
solving his problems. The amateur ID
not only able to diagnose the trouble
but can usually prescribe the cure.
DONALD J. DETWEILER, 3BsB.
Radio Editor:
Please give the location OF station
3xAZ.-A. F.
The call letters 3xAz have not beer
assigned.