The Portable Telephone Scramblers
were portable and could be used on almost any land line phone of cell
phone. They were highly popular in the 1970's and scrambled telephone
conversations from end to end. You would need two (one on each end on
the telephone call).
There where many uses. They were used b y countermeasures sweep teams
as part of their overall service to clients. Private investigative agenices
would give one to one of their high end clients to call them. This not
only provided a good communications security method, it also impressed
the client. Here is how they operated and their specs.
The Scrambler is a strap-on telephone device designed to scramble your
conversations from end to end (each party must have a Scrambler set to
the identical digital code). From simple monitoring of cellular phone
conversations to subversive bugs and taps, the Scrambler protects your
communication, and because it is fully self-contained, it can be used
anywhere in the world without modification. The Scrambler employees a
speech spectrum inversion technique which is digitally controlled by the
unit code select switches. There are 13,122 user selectable codes in four
factory code groups providing 52,488 code combinations. Operates on a
standard 9-volt battery.
• Pivoting acoustic couplers accept virtually all styles of telephone
handsets, including the new cellular radio-telephone and cordless phones.
Works on all standard communications systems which utilize a telephone
handset: tone or rotary
• Fully self-contained, (no wires to connect or get tangled) lightweight,
compact, and enclosed in durable high impact ABS housing
• Pick-up and hold together or use elastic strap attachment
• The SCRAMBLER employs a speech spectrum inversion technique which
is digitally controlled by the unit code select switch concealed in the
battery compartment. There are 13,122 user selectable codes in four factory
code groups providing 52,488 code combinations.
• Coding System operates over long international distances and prevents
unauthorized interception by other units.
• Clear natural sound quality allows voice recognition of individual
• Operates on standard 9 volt alkaline battery (not included)
• can be used with conference calls between two or more parties.
• Easy to read, pulsating status display L.E.D.'s indicate: Voice
Scramble or Voice Clear condition, receiver volume Up or Down, microphone
Mute and Low Battery
Ralph D. Thomas PI Vintage Collection
THOMAS INVESTIGATIE PUBLICATIONS, INC.
NATIONAL ASSOCIATION OF INVESTIGATIVE SPECIALISTS, INC.
SPY EXCHANGE AND SECURITY CENTER
P O Box 82148, Austin, Texas 78708
Showroom: 9513 Burnet Road, Austin, Texas 78758
Phone 512.719.3595 Fax 512.719.3594
BY THE STATE-OF-THE-ART COUNTERMEASURES SHOP!
To The Spy And PI Vintage Pages
2007, Thomas Investigative Publications, Inc. All rights reserved.
Thomas Investigative Publications, Trademark, 1981.
National Association Of Investigative Specialists, Inc, Trademark, 1986.
Spy Exchange, Trademark, 1999