Radial Engineering SW8 MK2 Bedienungsanleitung PDF herunterladen (Seite 6)

pg.6

Born in Annapolis, Maryland in

1942. Deane grew up in Princeton,

New Jersey. His Norwegian father,

Dr. Arthur S. Jensen, was a physicist

who earned his Ph.D. at Univ. of Penn

in 1941. He became an electronic-

imaging expert and was awarded 25

patents, taught physics at the U.S.

Naval Academy, and later worked for RCA Laboratories and

the Wesnghouse Defense and Electronic Center. Deane said

he remembered Albert Einstein coming to their home to visit

his father.

Following his father’s footsteps, Deane majored

in physics and electrical engineering at the University of

Pennsylvania. In September 1968, Deane joined Quad Eight

Sound as a systems engineer, becoming the VP of engineering

in 1971. His accumulated experience in the recording industry

told Deane that audio transformers oen were the root

cause of ‘bad sounding’ mixing boards and audio systems.

He decided to embark on a quest to x the shortcomings,

starng with transformers.

Deane became obsessed with how audio

transformers interacted with system electronics and started

basic research to solve the ‘bad sounding’ problems. Some of

his earliest designs from the 1970’s include the JT-DBE direct

box transformer and JT-MBC mic spling transformer which

set the standard for sound

quality and signal handling

and are sll in use today. He

later developed an integrated op-amp called the 990 which

was described and published in the AES Journal in 1979.

The amplier set new standards for its combinaon of low

noise, low distoron, slew rate, stability, and high output

drive capabilies. When Deane published the circuit, he

intenonally made the patent public domain, showing his

special dedicaon to furthering the state of the art.

Aer Deane’s passing in 1989, Bill Whitlock -

a friend and former engineer at Quad Eight - acquired

the company and connued the tradion with further

renements in producon uniformity and long-term

reliability. Bill introduced the ISO-MAX® range of plug & play

audio and video isolators to the world, enabling end users

to solve hum and buzz problems with ready-made Jensen-

equipped soluons.

Radial’s president and owner Peter Janis began his

relaonship with Jensen in 1992 as the Canadian distributor

and over the years, became Jensen’s largest customer. To

celebrate Bill’s 70th birthday, Peter purchased the company

from Whitlock. Jensen will connue to manufacture

transformers in Chatsworth, California and the company

is currently researching new ways to improve designs

and develop new technologies to bridge the benets of

transformer isolaon with today’s recording, broadcast and

producon needs. The Jensen legacy will connue.

Jensen with two NEW solutions

SP-2SX

Speaker to line level converters

CI-RJ2R

Two channel RCA to CAT-5 extender

The Iso-Max SP-2SX is a two channel speaker to line level converter that lets you

convert the high power signal from an audio amplier output to a +4 dB (nominal)

balanced line level for further processing or signal distribuon.

The design begins with a rugged anged enclosure that comes standard

with gold plated XLRs and a removable screw-down barrier strip for easy installaon

in NEMA enclosures and 19” racks. Plug and play easy to use, this passive interface

does not require any power to work. Inside are two Jensen high performance

transformers that isolate the output to eliminate hum and buzz caused by ground

loops while they eliminate issues with ‘bridged’ and ‘class D‘ power amp outputs. A

series of input pad DIP switches let you select the range to suit various power amps

for at 25 W, 75 W, 250 W, or 750 W max in to 8 Ω. All types of ampliers may be

used including 25 V and 70 V line driver types.

Once connected, the SP-2SX is able to withstand signal levels to +19 dBu

at 20 Hz without introducing distoron, phase shi or arfact of any kind. This

opens the door to expand exisng systems without having to run addional line

level signals throughout a facility.

The CI-RJ2R is a two channel passive line driver that lets you extend unbalanced

signals to 100 meters (350’) using standard CAT-5 or CAT-6 balanced twisted pair

Ethernet cable.

Sold as a ‘transmit and receive’ set, the design begins with two rugged

anged steel enclosures for easy mounng under a desk or inside a rack or NEMA

enclosure. Each end is equipped with RCA inputs and outputs with a standard

Ethernet RJ45 type connector in between. One merely connects the source and

desnaon devices using the RCAs and bridges the two units using o the shelf

CAT-5 or CAT-6 cable. This enables the system designer to employ pre-wired

network cable to run analog audio throughout a facility without having to sh

new wires.

Inside the receiver module are two Jensen high performance

transformers that are able to withstand signal levels to +19 dBv at 20 Hz without

any discernible distoron. These provide galvanic isolaon between the input

and output to eliminate hum and buzz caused by ground loops, rejecng noise

by as much as 124 dB.

Part# J304-0277

MAP $209.99 USD

Deane Jensen 1942 - 1989

“Deane recalls Einstein

visiting his father at

the family home when

he was a child.”

Part# J304-0280

MAP $229.99 USD

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