Electric Radio 206 2006 Jul.pdf

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lLJECTJRKC
IRADrrO
celebrating a bygone 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
whom many 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-mail, or call.
Regular contributors include:
Chuck Teeters (W4MEW),
Jim
Hanlon (W8KGI), Tom Marcellino (W3BYM),Bruce Vaughan
(NRSQ), Bob Grinder (K7AK), Bill Feldman (N6PY), Dave Gordon-Smith (G3UUR), Dale
Gagnon (KWH), David Kuraner (K2DK), Larry Will (W3LW), Brian Harris (WASUEK),
John Hruza (KB00KU), Hal Guretzky (K6DPZ), Gary Halverson (K6GLH)
Editor's Comments
AW A AM QSO Party 2006
Gary Carter (WA4IAM) sent
me th
e
resul
ts of the American
Wireless Association's AM QSO Par
ty th
at was
h
osted b
y
AWA last w
inter .
Here is Gary's re
port:
"The 2n
d
annual AWA AM QSO
Par
ty
h
eld
last
February
was a great success! Once again AM stations from all over
th
e
country, AW A
m
em b ers and nonmem
bers
alike
h
a d
lot
s of
fun contacting each ot
her
on the 75, 40 and 20
m
eter
h
am
bands. The
24 hour
event brought ou
t st
ation s using vintag
e
amateur,
military,
bro
adcast,
homebrew
and
m
od ern solid
state
gear. Many an
old timer
remarked tha
t
they hadn't
heard that
many AM
ham stations
on the air sin
ce th
e 1950s!
One unique
aspect
tha
t
made the
event
so
much
fun w
ere th
e two flagshi
p
stations that w
ere
on the air to give the
oth
er participants a special contac
t to
strive
for. We tip our
h
at s
to
Ed Gable K2M
P, Dave
Payne
KA2J
and the rest of the crew
at the AWA Museum for p
utting
W2AN on the air as the eastern flagship station
.
The
y
fired
u
p James Millen's personal transmitter on 75 meters,
u
sed a beautiful BC-
610 on 40 meters and a Johnson transmit
ter
on 20 meters. We also sa
lute
Jim Hanlon
W8KGI and Doc Khalsa K7S0 for manning the western flagship station
usin
g James
Millen's old ca
lls ign
WIHRX. I don'
t
have the final QSO Party
tally
for W2AN, but
the
b
oy s at WI
H RX
managed 18 contac
ts
on 75 meters, 9 on 40 meters and 35 on
20 meters, for a grand total of 311 points. Of course being flagship stations they
aren'
t
included in the scores with the other participants.
[Continued on page 4]
TABLE OF CONTENTS
2 The Heath
kit Mo
v ie Star
W4MEW
W3LW
5 Using a Bea
d Blaster
to Prepare Ste
el for
Replating or
Paintin
g
K0EOO
10 A 1940s Vintage
Jam
es Millen Transmitter
19 Restoration of a Collins KW-l
W0YVA
WIUJR
24 The National SW-5 "Thrill Box"
K7SC
30 The American VHF-AM Equipment Gallery:The Original Clegg 22'er
32 The AM Broadcast Transmitter Log, Part 12, RCA and Gates
K2DK
N900
36 Th
e
Electric
Rad
io Yea
rl y
Index, Issues 192 to 205
41
DD-
I 03 Digital
Dial
Product Review
W8TOW
ER Readers
44 Photos '"
46 Vintage Ne
ts
ERReaders
47 Classified
ER Readers
~~~~~~~~l~~~~~~~~
The Heathkit Movie Star
By Chuck Teeters W4MEW
110 Red Bud Lane
Martinez, GA 30907
Cteet70@aol.com
At our radio club spring swapfest and
picnic, Frank, KS40C brought a neighbor
who had his deceased father's Heathkit
HW-I0l. He wanted to sell it, so Frank
said come to our shindig and see
if
someone wants it.
It
had been in the
father's storage shed for an unknown
number of years. The son found it when
he was cleaning out after his father's
demise. TheHW -101 wasa 100-wattHF
SSB and CW transceiver kit that Heath
sold from 1970 to 1982.
It
looked a bit
forlorn, covered with dirt and mildew
and the green Heathkit paint was flaking
off. Additionally it had been partially
repainted when a can of white paint had
spilled on it. There was considerable rust
on the bottom of the matching HP-23
power supply, so it must have been the
low man in the shed. A Heath HS-24
speaker, a few cables, and a Drake 7075
EV desk mike were included in the sale.
Most club members ignored the Heathkit.
The few who looked asked what was
it,
and then moved on. Only Henry, KN4A V,
looked and said "I had one of those 25
yearsago."
The food was about ready, and the
swap meet was slowing to a stop. Frank
said to me, "make an offer, you like old
radio stuff and the owner doesn't want to
take it home." I walked over and the
Heathkitlookedatme, with tears running
down its dial, and cried out for help. I
couldn't ignore that desperate plea so I
made a two six-pack offer.
It
was
immediately accepted, and like a flash
the owner was loading it into my van,
leaving a trail of green and white paint
flakes and rust marks on the carpet. When
I got home, I put the stuff in a cardboard
2
Electric Radio #206
box and vacuumed out the van.
The Saturday night movie on a cable
channel was "Frequency." I had seen
it,
but decided to watch again. The plot, if
you haven't seen or don't remember the
movie, is where the fireman's son pulls
out his dead, for 30 years, father's Ham
radio (unnamed but obviously a
Heathkit), and gets it operating. Then by
some strange auroral propagation (known
only to Hollywood) talks to his dead father
who is using the same radio 30 years
before. The son tells his fireman father
how to avoid getting killed in a fire 30
years ago, and the father tells the son
where to find evidence that will save the
son's life and career in the present, and
they live happily ever after
(If
the Heathkit
survived itwas not mentioned). Suddenly,
I had a goalfor my HW-I01. I would try
to fix it up with what tools and stuff I had
in the kitchen drawers, which is what the
son did twice in the movie (the second
time because it fell off the desk) without
test gear, spare parts, or instruction book.
While the movie Heathkit appeared to be
an SB-I01, my HW-I01 was identical
except for the VFO and dial.
In the garage, I took the HW-101 out of
the box, put it on the floor, brushed off
the loose paint, and took off the top and
bottom covers.
It
didn't look too bad:
dust, dirt, and bug remains. I did the
same with the HP-23 power supply.
It
was a mess inside, rust, corrosion, and
bug remains, but as I had done with the
transceiver, I cleaned it out with a clean
paint brush. I figured a can of WD-40®
would be within the realm of common
household tools, so I sprayed down the
HP-23 power switch, circuit breaker, and
connector. Then I used the WD-40® on
the HW-I0l switches. Next I removed
the tubes, used a bit of WD-40® on the
tube sockets, and used sandpaper to clean
the tube pins
.
I reinstalled the tubes, and
July 2006
used some light oil on the control-shaft
bearings. I used the sand paper to clean
the pins on the ll-pin, octal-type power
connectors.
Now was the time for the rubber to
meet the road. I connected the power
cable between the power supply and
transceiver, and plugged it into a garage
outlet and turned the power switch on.
Dial lamps and tube filaments lit, and
most important, no smoke, fire, or sparks
from the transceiver or power supply. I
grabbed the HS-24 speaker and cord to
connect it up. The cord was rotted and
the RCA connectors were rusted out. I
had a hi-fi jumper with RCA connectors,
so I used it to connect the speaker. There
was noise using a long wire pl ugged into
the antenna jack. I tuned around and
could hear the internal 100-kHz calibrator
and some weak 40-meter signals when I
peaked up the preselector tuning. The
tune position of the mode switch gave
me some plate current.
Now, I moved the set from the garage
floor to the workbench where I had access
to antennas. I attempted to connect the
Drake desk mike. The Heath uses an
Amphenol 80-C2 connector. The male
connector on the mike had a crushed
locking ring. I had some spares, but tha t
was against my self-imposed, get-it-
working rules.
It
took about an hour with
pliers and screwdrivers to get the thing
close enough to round so it would screw
on. The push-to-talk was intermittent,
and the receiver didn't always come back
to life. I found two sma1l4PDT relays that
were operated by the mike PTTswitch. I
cut a strip of very fine sandpaper and
used it to burnish up the contacts. The
relay on the chassis was easy, but the one
in the PA cage was a dog. After the
cleaning the transmit-receive, PTT was
good to go.
With a 40-meter antenna, the 101 tuned
My Heath HW-l0l "Movie Star" transciever.
Electric Radio #206
July 2006
3

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