August 1963 Popular Electronics
Wax nostalgic about and learn from the history of early electronics. See articles
published October 1954 - April 1985. All copyrights are hereby acknowledged.
In this August 1963 adventure
from Popular Electronics magazine, teenage techno-investigators Carl Anderson
and Jerry Bishop use their home-brew sonar device to help the local sheriff nab
a couple bank robbers. The "Hydro Probe" mentioned in the article was a real product
manufactured by the Raymond Development Company of Watertown, Massachusetts (no
longer in business). By this time the duo were students pursuing electrical
engineering degrees at Parvoo University (a play on
Perdue University, located in the boys'
home state of Indiana). Enjoy.
Carl & Jerry: Sonar Sleuthing
By John T. Frye W9EGV
Jerry inched forward slowly, keeping his depth
... suddenly the end of the sonar unit bumped into a large object in the water.
Up periscope!" Jerry called to Carl, and the latter released the large cylindrical
object he had been holding on the bottom of Jerry's full bathtub and watched it
slowly rise to the surface.
The youths were checking out their latest "invention," a hand-held portable sonar
unit for use in scuba diving. Actually it was just a crude copy of the Hydro Probe
manufactured and sold by the Raymond Development Company of Watertown, Massachusetts.
While the unit the boys had made was much larger and clumsier than the commercial
version, it operated on the same general principle.
They had simply installed inside a large paint bucket a flashing-light type transistorized
depth-finder. The depth-finder was the same kind they had used at Parvoo University
to locate a metal plaque at the bottom of the river. A five-inch diameter circle
had been cut from the center of the airtight lid, and a heavy sheet of Plexiglas
had been cemented over this opening so that the depth-finder dial mounted just behind
it could be seen. The transducer had been fastened to the outside bottom of the
can, and the cable from it led inside through a waterproof seal.
Finally, the on-off/sensitivity control was connected through a speed-reducing
gear train to a tiny permanent magnet reversible electric motor. The motor, in turn,
was controlled by a spring-loaded, normally-off, double-pole, double-throw toggle
switch mounted on the side of the paint bucket. An unpierced nursing bottle nipple,
with its rim cemented to the bucket, slipped over the bat handle of this switch,
and permitted control of the sonar device inside its waterproof seal.
"That does it," Carl said, lifting the dripping unit from the bathtub and holding
it in front of his face by means of the two strong handles soldered to the sides
of the can. "It barely floats, so it should be easy to maneuver under water, and
it doesn't leak a drop. Let's take it to the old quarry and try it out."
"O. K.," Jerry agreed. "You load the scuba gear in the car while I dry this thing
off. Mom'll kill us if we drip water on her floors."
A half hour later the boys left the highway and traveled a short distance along
a side road until they reached the abandoned quarry. They were just getting out
of their car when they were surprised by the voice of the county sheriff.
"Over here, fellows," he called, emerging from the undergrowth. They could see
the sheriff's car parked behind some bushes growing between the road and the edge
of the steep-sided quarry.
He was an old friend, and Carl did not hesitate to ask, "Hey, what are you hiding
"Remember that branch-bank holdup at the shopping center a little over a year
ago?" he asked. "The two men we think did the job ran through a roadblock and came
out on the highway with the state troopers on their tail. They took off on this
road and lost the state police for a few minutes - about fifteen. The police closed
in from both ends of this short road and took them not a quarter of a mile from
here, but none of the bank loot was on them."
"We searched every inch of the road and a hundred yards either side," the sheriff
continued. "The prosecutor didn't have enough on them to try them for the bank job,
but they both did a year in the pen for possession of a stolen car. Their sentences
were up last week, and I'm staked out here on a hunch those two birds stashed the
dough away, and will try to come back for it."
"Maybe they threw the money in the quarry," Carl suggested.
"We thought of that, and state police divers spent two whole days exploring the
bottom, yard by yard. They had to do most of their searching by touch because working
of the sand pits along the little creek feeding into the quarry keeps the water
riled up so you can't see more than a foot or so in front of you. The divers found
old tires, empty beer cans, rolls of rusty fence wire, baby buggies - everything
but money. But what devilment are you two ..."
Before he could finish his question, an emergency call tripped the squelch of
the radio installed in his car. The city police had just received a telephoned tip
that a supermarket on the other side of town was to be held up, and the dispatcher
relayed the information along with the message that all mobile units in the county
were ordered to converge on the spot.
"Stick around, I'll be back," the sheriff said as he headed for the highway.
Carl and Jerry walked down a slope to the edge of the quarry. Across and to the
right, the sheer walls of the large pit went almost straight down to the surface
of the muddy water some thirty feet below. Where they were standing, a thick curtain
of vines grew over the edge and cascaded down until the vine ends trailed in the
water. Over to the left, however, a steep path zigzagged down to a narrow ledge
running around the quarry a foot or so above the water.
They lugged their gear down this path, and Carl helped Jerry put on the scuba
outfit. In practically every other physical endeavor, Carl was easily Jerry's superior;
but in swimming, the chubby youth was as much at home in the water as an otter.
"Blubber floats better than muscle." was Carl's succinct and disparaging explanation.
With the diving equipment in place and checked out, Jerry picked up the portable
sonar and slid beneath the murky water. Going down a few feet, he worked the rubber-covered
switch handle to turn the unit on and adjust the sensitivity.
The two glowing spots of neon light on the dial of the depth-sounder were easily
seen when the Plexiglas disk was held close to his eyes, and he was delighted to
find the crude affair working exactly as anticipated. Not only did it indicate how
far the bottom was beneath him, but the stone walls of the quarry also returned
sharp echoes to indicate their distance from his location. Moreover, when he turned
on his back and pointed the instrument straight up, an echo was returned from the
air-water interface that indicated how deep he was swimming.
He played with the instrument for several minutes, trying it out at different
depths and "swimming blind" with only the sonar ranging indication of the instrument
to tell him how deep he was swimming and to warn him when he approached the bottom
or sides of the quarry. While he was swimming some fifteen feet below the surface
toward the vine-covered wall of the pit, the distance-indicating spot of light suddenly
jumped counterclockwise from the ten-foot to the five-foot position. Swinging the
instrument slightly to either side or up or down returned the spot of light to the
more distant indication.
Keeping his depth, Jerry inched slowly forward until the front end of his paint
bucket bumped into something suspended in the water. Inspection with his hands revealed
it was a large metal container of the kind pressure-gun grease is kept in at a filling
station. A thin wire led straight up from the bail, and Jerry followed this upward
with his hands until he came to the surface.
He discovered he was behind the screen of vines and that the thin strand of steel
piano wire ran up through these vines to the top of the quarry. He was about to
call to Carl, whom he could see through the leaves, when he was stopped by the sound
of a man's voice above him yelling at Carl.
"Just stay where you are and keep your mouth shut, buddy, and you won't get hurt.
My friend, Chauncey, and I just want to pick up something we left here a while back.
When we get it, we'll go our way and you can go yours."
"Go on and pull up that grease bucket, Bert," Jerry heard another voice say.
"I'll keep the gun on him. I can't wait to get my hands into that lovely green grease.
You know, I'll bet that tricky sheriff was hiding out, waiting on us. Man, he was
really flying low when we met him on the highway. That phony tip of yours was a
real smart idea."
Very quietly Jerry eased himself up on the rock ledge. Then, after a short search,
he picked up a piece of broken broom handle floating near his feet and twisted it
in the piano wire so that a couple of turns went around it.
A few seconds later he felt the man above fumbling and tugging at the wire.
"Come here and help me, Chauncey.
The wire must be tangled in the leaves or something, and the footing ain't very
good on this slope. I sure don't want to drop the end of the wire. That kid can't
go anywhere with us watching him. Take hold of that side of the stick and help me
A stronger tug came on the wire, and Jerry slowly rose to his feet, giving slack.
Then, grasping the piece of broom handle with both hands, he leaped from the ledge
throwing his full weight onto the wire. The result was startling. Two bodies came
hurtling down from above and hit the water with great splashes. A third smaller
splash was made by the revolver.
When Jerry surfaced, he saw Carl leaping up the steep path as if he were a mountain
goat. Listening to the men behind him spluttering and cursing as they clawed their
way up on the ledge, Jerry decided Carl had a good idea; he swam quickly to the
foot of the path and climbed out of the water.
The two men were starting toward him along the ledge, and he didn't even take
time to remove his air tanks or swimming fins as he started a clumsy ascent up the
path. Carl said afterward, that, as he watched Jerry frantically slipping and floundering
on the path, all he could think of was a circus seal climbing up a stepladder to
get a fish.
When the two men started to follow Jerry, Carl pelted them with stones. Jerry
struggled out of the diving equipment and joined the fight at the top of the path.
Using only jagged chunks of rock for weapons, the two of them easily held the men
at bay until the sheriff came back a half hour later.
After the boys had explained the situation and the law officer had Chauncey and
Bert safely handcuffed to the steering wheel of his car, Jerry dove down and brought
up both the revolver and the end of the piano wire. The grease bucket was hauled
to the surface and opened. Inside, lying on sand used for ballast, were several
neat packages of currency.
"Every dollar is here," the sheriff announced when he finished counting it. "All
the time those police divers were groping around on the bottom, the money was hanging
right over their heads waiting to be found by a gadget like that one of yours. Those
two had this planned right from the start. Instead of taking off down this road
to get away from the troopers, they were heading for this quarry to hide the dough.
Well, boys, that little electronic doodad of yours sure did well by you today. The
insurance company has a pretty good reward out for the recovery of this money, and
it's all yours."
"How about you?" Carl demanded.
"You should get a third of it. We would have been sunk if you hadn't come back
when you did."
"Nope. A sheriff in this state can't accept a reward in cases like this. It's
reward enough for me to see those two clowns get what's coming to them."
He paused while his eyes roved from the homemade sonar rig to the empty grease
bucket. A mischievous grin spread over his face as he concluded:
"So help me, when I write up my report, I'm going to call this The Case
of the Two Buckets!"
Carl Anderson and Jerry Bishop were two teenage boys whose
love of electronics, Ham radio, and all things technical afforded them ample opportunities
to satisfy their own curiosities, assist law enforcement and neighbors with solving
problems, and impressing – and sometimes toying with - friends based on their proclivity
for serious undertakings as well as fun.
Vox Electronik, September 1958
- Pi in
the Sky and Big Twist, February 1964
Bell Bull Session, December 1961
Boogie, August 1958
- TV Picture,
Electronic Eraser, August 1962
Trap, March 1956
at Work, June 1956
Aweigh, July 1956
Bosco Has His Day, August 1956
Hand of Selene, November 1960
or Not?, October 1956
Electronic Beach Buggy, September 1956
Extra Sensory Perception, December 1956
in a Chimney, January 1956
Performance, November 1958
of Judas, July 1961
- The Sucker,
New Year, January 1963
Snow Machine, December 1960
Extracurricular Education, July 1963
Slow Motion for Quick Action, April 1963
Sleuthing, August 1963
- TV Antennas,
a Soroban, March 1963
Fair --", September 1963
Worm Warming, May 1961
Santa's Little Helpers - December 1955
Two Tough Customers - June 1960
Pocket Radio, TV Receivers
Yagi Antennas, May 1955
Stomping, March 1962
Blubber Banisher, July 1959
- The Sparkling
Light, May 1962
Research Rewarded, June 1962
- A Hot Idea, March
- The Hot
Dog Case, December 1954
A New Company is Launched, October 1956
Under the Mistletoe, December 1958
Electronic Eraser, August 1962
- "BBI", May 1959
Sound Waves, July 1955
- The River
Sniffer, July 1962
- Ham Radio,
Torero Electronico, April 1960
Wireless, January 1962
Electronic Shadow, September 1957
Elementary Induction, June 1963
- He Went
Electronic Detective, February 1958
Aiding an Instinct, December 1962
- Two Detectors,
with a Tachometer, July 1960
and the Pirates, April 1961
The Crazy Clock Caper, October 1960
Carl & Jerry: Their Complete Adventures is
now available. "From 1954 through 1964, Popular Electronics published 119 adventures
of Carl Anderson and Jerry Bishop, two teen boys with a passion for electronics
and a knack for getting into and out of trouble with haywire lash-ups built in Jerry's
basement. Better still, the boys explained how it all worked, and in doing so, launched
countless young people into careers in science and technology. Now, for the first
time ever, the full run of Carl and Jerry yarns by John T. Frye are available again,
in five authorized anthologies that include the full text and all illustrations."
Posted September 17, 2021(original 3/18/2014)