Electric Radio 210 2006 Nov.pdf

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celebrating a
era
ELECTRIC RADIO
Published monthly by Symbolic Publishing Company
PO Box 242, Bailey, Colorado 80421-0242
Periodicals postage paid at Cortez, CO
Printed by Southwest Printing Inc., Cortez, CO
USPS no. 004-611
ISSN 1048-3020
Postmaster send address changes to:
Electric Radio
PO Box 242
Bailey, CO 80421-0242
Copyright 2006 by Symbolic Publishing Company
Material appearing in Electric Radio may not be used in any
method without prior written permission.
Editor
Ray Osterwald, N0DMS
Editor Emeritus
Barry R. Wiseman, N6CSW
Electric Radio is all about the restoration, maintenance, and
continued use of vintage radio equipment. Founded in May of 1989
by Barry Wiseman (N6CSW), the magazine continues publication
for those who appreciate the value of operating vintage equipment
and the rich history of radio.
It
is hoped that the magazine will
provide inspiration and encouragement to collectors, restorers
and builders.
It
is dedicated to the generations of radio amateurs,
experimenters, and engineers who have preceded us, without
whommany features of life, now taken for granted, would not be
possible.
We depend on our readers to supply material for ER. Our pri-
mary interest is in articles that pertain to vintage equipment and
operating with a primary emphasis on AM, but articles on CW,
SSB, and shortwave listening are also needed. Photos of Hams in
their radio shacks are always appreciated. We invite those inter-
ested in writing for ER to write,
e-mailv
orcall,
Regular contributors include:
Chuck Teeters (W4MEW), Jim Hanlon (W8KGI), Tom Marcellino (W3BYM), Bruce
Vaughan (NR5Q), Bob Grinder (K7AK), Bill Feldman (N6PY), Dave Gordon-Smith
(G3UUR), Dale Gagnon (KWH), David Kuraner (K2DK), Larry Will (W3LW), Gary
Halverson (K6GLH), Brian Harris (WA5UEK), John Hruza (KB00KU), Hal Guretzky
(K6DPZ)
Editor's Comments
Historic FCC Rule Changes
The FCC has issued a Report and Order docket that will
result in si
gnificant,
long-awaited, and historic changes to
the amateur
rad
io rules. These changes will expand the
phone sub-band privileges on the 75, 40,
an
d IS-meter
bands.
Once the new rules
go
into effect, on
75
meters, the phone
band
w
ill begin at 3600 kHz for Amateur Extras, 3700 kHz for
Advanced, and at
3800
kHz for Generals. For General-class license holders, this is
a
50-kHz
increase
that
is
long overdue. On
40
meters, the phone se
gment
will begin
at 7125 kHz for Extra and Advanced licensees and at 7175 for the Generals. There
is no change on the 20-meter band
.
The 15 meters changes act to move the bottom
of the General Class phone band to 21275 kHz. The bottom of th
e
phone band for
Extras will remain at 21200 KHz and 21225 kHz for Advanced-class licensees.
For Novices and Technicians with CW exam credit, privileges will
sign
ifican tly
exp
an d for CW and data modes on the same frequencies as General and Advanced
licensees currently have on 80, 40, and 15 meters: 3525 kHz to 3600 kHz;
7025
kHz
to 7125 kHz; and 21025 kHz to 21200 kHz. Amateur Extra licensees have full CW
privileges on all bands.
There were additional changes to the rules governing auxiliary station operations,
sp
read sp
ectrum
transmission, retransmission of signals from the International
Space Station, to the vanity call sign program,
gu
id elin es on external RF amplifiers,
and clarifications to the Volunteer Examiner license testing program.
(Continued on page 34)
TABLE OF CONTENTS
2 The H
allicrafters
Legacy
8 The Hallicrafters SX-117, Part 1
11 A Vacuum Tube Curve Tracer
18 Hints and Kinks for Restoring Boatanchors
23 The Heathkit Vacuum Tube Sid
eband
Line
29 Resurrection of a Heath HR-I0B Receiver
35 A CW Transmitter from the 1930s
42 High Altitude Amateur Radio
44 Photos
46 Cla
ssifieds
W4WTO
N0DMS
KF4FOR
W0YVA
K2DK
WD5DZG
NR5Q
W5CZ
ERReaders
ER Readers
Cover:
If
you own Hallicrafters equipment that wasmade after 1945,
it
was
certainly produced at this
legend~ry
facility in
C~icago.
Notice how the
"h"
logo is stillover the front door! Considering Hallicrafters' many contributions
during WWII, this building. should be on the National Register of Historic
Places. Bob Harmon (W4WTOr has aphoto story about the remaining
Hallicrafters buildings that begins on page 2.
~~~~~~~~u~~~~~~~~
The Hallicrafters Legacy
By Bob Harman, W 4WTO
PO Box
30295
Savannah, GA 31410
bobh@g-net.net
As m
y
famil
y
and I mad
e ou
r way
through do
wnto wn
Chicago on the
architectural boat tour,
w
e
w
ere a
we
struck with the be
auty
and col
ossal scale
of the Windy City
.
Not only did the
magnificence of the architecture al
ong
the Chicago River impress us
,
the de
sign,
engine
ering and
in
genuity
of the buildings
m
ade
a
gr
eat impression.
Chicago is truly one
of
the world's
great citi
es.
The Nav
y
Pier, Millennium
Pa
rk ,
Lakeshore Dri
ve,
Michigan
Aven ue
,
Sears
Tow
er, fantastic restaurants
an
d
one of my favorite hotels, the Drake,
with its
grea
t
view of
Lake Michig
an.
Chicag
o w
as
als
o home
of
one of the
w
orld's
great
consumer electronics firms,
The Hallicrafters Company. Hallicrafters,
as most hams know, was on
e
of the
leaders in electronics
w
ith a diverse
product line
in
clu d in g television
,
hi-
fi,
test equipment, military, consumer
an
d
amateur radio equipment. Th
ey
ev
en
Figure 1: This is the building directly across the street from the first factory at 417
North State St
reet
in Chicago.
T
h e original building is long gone and
a
1960's-era
parking garage now stands on the site. The building in the photograph is typical
of the 1930's architecture style and gives one an
id
ea of what it looked like. This
location was used during the early 1930s, and the early Skyrider series of
r
ad i os
were produced there.
2
Electri
c
Radio
#210
Novem
be r 2006
Taken in the late 1930s, Bill Halligan is on the air from his ham station that was
set up in the office at 417 N. State Street in Chicago. The transmitter is an HT-4,
SIN
1. (Photo reproduced from Electric Radio #11, March 1990)
Figure 2: This is the second site on 2611 Indiana Avenue. The apartments pictured
here, 2611A and 2611B, now stand where all of the production took place from the
mid-1930s through the end of WWII. The Super Skyrider series would have been
manufactured at this site.
It
is interesting to note the garages pictured here are
trimmed in the same plum red color paint as the third plant at 5
th
and Kastner.
Electric Radio #210
November 2006
3

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