JOHNSON RADIO CATALOG - SCAN courtesy of K5JWK; catalog courtesy of Johnson CARDWELL VHF-UHF OSCILLATOR (This uses acorn tubes) From the E. Sharpe collection at SMECC Joseph M. Reinert Brophy Radio Club QSL Cards Joseph Reinert 's Amateur Radio License Joseph Reinert at Mountain Bell Joseph M. Reinert 03-10-1924 to 12-18-2009 Joseph Reinert, better known as Joe, was born in Chicago, Ill. In 1948 he

and his family moved west to Phoenix, AZ. Shortly after moving to Arizona he

obtained a job with the telephone company and worked for nearly 40 years

throughout all the changes. He started out climbing the poles and worked

into installation, mobile phone shop, and the microwave towers for various

radio and television stations. He worked on many of the radio and television

loops, as he called them, for big events in Phoenix. I remember he worked on

the loop when JFK came to downtown Phoenix and my Dad brought my sister

and I to his work section so we could see a close up of Mr. Kennedy. It was

exciting to know he was around some famous people. He also worked on big

television projects such as the Phoenix Open Golf Tournament. In the early 1960's he became interested in being an Amateur Radio Operator.

Our kitchen was filled with radio equipment that was placed against the wall

from one end to the other. Many days and nights he would sit and I could

hear "CQ, CQ, CQ6, this is K7HYG in Phoenix, Arizona is anyone out there". I

was amazed at how many people were on the radio. He received numerous

cards from all around the United States. He designed his own card and was

involved with the Brophy College Preparatory School Radio Club and designed

their call card also. My Mom assisted with the design and then proceeded to

do the silk screening to print the cards. After his passing we found some of his radio equipment , cards, and a

picture. I contacted Ed Sharpe after looking for a home for his memories to

be displayed. Ed was very gracious and told me that he was going to do some

research to see if he could find more information regarding Dad's

communication experience. I am so looking forward to seeing a part of my

Dad's life being reflected in the SMECC museum. Mary Lou Mitchell

what is a loop? by Bert Wiener Bert Wiener and Associates Well, a loop is a Telco term that generally refers to a circuit - mainly between a customer and a C.O., or between the two ends, at least that's the way I've always heard it used. I dealt with a lot of "Program Loops", or circuits over the years. For example, when doing the Los Angeles Philharmonic Orchestra broadcasts, we'd order a 15 kHz loop, or circuit, sending from the Music Center to our studio's on Wilshire Boulevard. Prior to the advent of ISDN, program circuits were in common use between a remote broadcast location and the studio. Still, today, it's not uncommon to have a loop, or program circuit carrying a station's audio from its studio to its transmitter. Program loop/s is a way to get good quality audio from one point to another short of running your own wire out the door and down the street.



Prior to satellite delivery, network feeds, such as the Mutual Network, CBS, ABC and all the others all pretty much depended on Telco program circuits.



Common program circuit bandwidths are 8 kHz (AP3) and 15 kHz (AP4). I've always gone with 15 kHz circuits because the installation costs were about the same and the monthly fee was only a few dollars (like $3 or $4 dollars) different. 15 kHz circuits are generally cleaner and don't present roll off in the same part of the spectrum as other system filters or roll offs might. Having all the system filters rolling off in the same place can cause ringing in the audio, the same way it does in video.



In video the ringing can show up as anticipatory, or pre or even post ghosting - quite noticeable around collars and other sharp transitions from black to white. In audio it can appear as distortion in the area of similar roll off. I prefer having all bandwidth/s as wide as possible ahead of the last narrower filter.



Then there are "Stereo Pairs", which refer to two program circuits used for stereo broadcasts. These had to be the same length, run over the same path, and had to equalize out so that the maximum phase shift between the "pairs" at any frequency between 50 and 15,000 CPS (Hz) was no greater than 3 degrees measured end to end.



Photographs and Cards of the late

Capt. Lyman M. Edwards USNR Ret. Amateur Radio Operator W5FJ Click above to go visit Capt. Edwards... At The Museum...

5-T Sky Buddy at the museum.

1936, 6 tubes, 3 bands, orig. $29.95

KWS-1 We have one! we need: A set of Finals Set of HV cables Antenna Relay 75A4 Receiver to match with it





The history of the Rubber Ducky Antenna.



I've read a lot about "Rubber Ducky" Antennas on the Web and

it seems that nobody knows where they came from! It seems

that many people think that they are just some natural outcome

of a typical engineering design. In fact, if a Rubber Ducky

Antenna did not already exist, and you put a bunch of Engineers,

Mathematicians, and Physicists in a design conference and

asked them to design one, they would properly claim that

it couldn't possibly work.



When I was at the Lyman School in Westborough Massachusetts,

a reform school for juvenile delinquents, I operated a Ham

Radio Station on the 6-meter phone band. My call sign was

K1KLR. Because space was a premium, I was unable to have an

outside antenna. Therefore, I invented what became known as

the "Rubber Ducky Antenna". It was first called a cantenna

long before Heathkit borrowed the name for a dummy-load.

It was published in QST Magazine sometime around 1958 by

my mentor, Mr. Guido Sandini, who was the cottage master

at Westview Cottage at Lyman. Mr. Sandini was a well-known

"ham" who taught a "ham-radio" class at the Lyman School.



This is the story about that invention.



I was kind of a privileged character at Lyman, having already

"done my time" and awaiting out-placement. I became part of

a successful program where such persons were allowed to attend

"outside school" in Westborough.



After returning from outside school each afternoon, I was

supposed to use a small room at the front of Lyman Hall

for my homework studies. After I would barely complete my

homework, I would set up my Ham Radio station and attempt to

communicate with others in the Westborough area. I didn't

have a place to install an antenna so I would connect the

shield of a co-axial cable to the screen of a screen-door,

poke the center conductor through a hole in the screen, then

attach a 1/4 wave-length wire to that. This would dangle

outside and sometimes work as an antenna.



Some hams would refer to this makeshift antenna as "loading

up a screen-door". At one time I thought I heard the words

"screen-door spring". This make me think. The problems with

the wire dangling through the screen were that it was too

long and it wasn't properly oriented for a good antenna.



So, my first attempt at a rubber-ducky antenna was what

I called the "cantenna". This consisted of a paint can

which I filled with rocks for support. To the top of the

can I soldered 4 radials of brazing rod. Their length

was determined by the size of the floor of the closet

where I would store this contraption. In the center of

the can-lid I installed a coaxial connector so that

the solder connection was oriented upward from the

top of the can and outside the can. I Punched a hole

in the side of the can so that I could insert the

coaxial cable from the transmitter and receiver T/R

relay. I soldered a section of a screen-door spring

to the center conductor of the coaxial connector.



I found that the spring needed to be only about 10

inches high after I had stretched it so that none

of the turns touched each other. This was tuned, with

the transmitter at low power, by adjusting the length

so that a neon bulb would illuminate when brought

near the top of the spring and an inductive loop

coupled to a light-bulb would light the bulb when

brought near the base of the spring.



After scratching my eye while taking my portable

antenna down, Mr. Sandini suggested that the spring

be put inside a piece of windshield-wiper hose. Since

we didn't have "shrink-tubing" in those days, this

was difficult to do until I threaded a wire through

the spring and used it to pull the spring through

the tubing from the bottom of the spring so it

wouldn't distort and stretch out the antenna.



Mr. Sandini made some further experiments with my

antenna, in fact making one that required no ground

radials at all. It was just a spring in a rubber hose

with a banana plug on one end. This would plug into

the top-of-the-box antenna connector on the portable

transceivers used by the Civil Defense, the Gonset

Communicator III. He made several for both the six

and two meter amateur radio bands.



After using this antenna successfully at a "Ham Fest"

in Swamscot, Massachusetts, Mr. Sandini published an

article about it in the QST magazine.



Now, neither Mr. Sandini nor myself knew why the spring

worked as an antenna. My first thought for the design was

that I needed a spring that, when stretched out, would

be 1/4 wave-length long to emulate a 1/4 wave-length

whip. I carefully calculated the stretched-out length

of a spring from its circumference and wire diameter.

Imagine my surprise when I found out that the thing

would resonate, produce better than a 2:1 VSRW, and

actually function as an antenna, when about 1/6

the calculated length! Then it was thought that

it was the resonance alone that made it antenna-like.

However, this wasn't true because good coils don't

radiate very much energy (they are low-loss). Then

it was thought that the thing just acted like a base-

loaded whip. This turned out to be untrue as well.



Basically, the Rubber Ducky can't work as well as

it does. A well-constructed Rubber Ducky has a base

impedance near 50 ohms. This is dependent upon the

ratio of the diameter to length. It also has about

10% bandwidth. This is dependent upon the spacing

of the turns, the closer the spacing, the lower the

bandwidth. It also has an aperture that is over twice

its physical size. This is the real anomaly. No

other antenna has an aperture greater than its size.



After I left Lyman School, I started a career that

has spanned over 4 decades of successful Engineering

Design. I have moved from Radio Transmitter design

through medical Ultrasound design to Software Design

for CAT Scanners and Airport Baggage Scanners. Every

time I see somebody with a Cell-Phone, I remember those

beginnings. Now, if I had only Patented the damn thing!



I read about the origin of the name "Rubber Ducky".

It was originally called a cantenna and then a vertical

helical, neither of which really defined the antenna.

I think it was Caroline Kennedy who gave it its name

when pointing to one on the top of a secret service

security guards transceiver.



Cheers,



Richard B. Johnson

Project Engineer

Analogic Corporation

We have a Galaxy V need a power supply though wither 12 v or 115 volts.

email info@smecc.org with 'Galaxy Power Supply" as subject! Below are a few other things we have in the collection! We are looking for manuals and accessories for most of them! Swan SW120 National NC-190 receiver with matching speaker Gonset Communicator IV Yes defetly need manuals for this one! Power supply for???!?! the Swan maybe??? Help.....