Ramsey-electronics SS70A Manual do Utilizador Página 1

SS70A • 1 SPEECH SCRAMBLER / DESCRAMBLER KIT Ramsey Electronics Model No. SS70A Communicate in privacy over any audio path! Full duplex operat

SS70A • 10 without "straining" the leads. Solder all three connections securely.  16. Install R12, 1K ohm (brown-black-red).  17. Install

SS70A • 11 done inside the chip, this should go fairly quickly.  32. Install C6, 22 pF disc capacitor (marked 22 or 22K).  33. Install C7, another

SS70A • 12  51. Install C18, the last 10 uF. Watch that polarity!  52. Install VR1, the 7805 voltage regulator. Orient it as shown in the parts dia

SS70A • 13 Configuring the SS70A inputs: LINE LEVEL INPUT  Depress pushbutton switch S3 OUT to the LINE position. SPEAKER LEVEL INPUT  Set push

SS70A • 14  Set pushbutton switch S3 to the IN position to select SPEAKER level input.  Install the jumper block between the pins on J4 labeled “SP

SS70A • 15 the message back, switch the power switch to “bypass” mode to hear the scrambled message. TYPICAL TWO-WAY RADIO HOOKUP: (SS70A required a

SS70A • 16 TROUBLESHOOTING INSTRUCTIONS Since this circuit contains relatively few components, problems are usually due to mental errors rather than

SS70A • 17 CONCLUSION We sincerely hope that you have enjoyed the construction and use of this Ramsey Kit. As always, we have tried to compose our

SS70A • 18 SS70A PARTS LAYOUT DIAGRAM

SS70A • 19 The Ramsey Kit Warranty Please read carefully BEFORE calling or writing in about your kit. Most problems can be solved without contacting

SS70A • 2 RAMSEY TRANSMITTER KITS • FM100B Professional FM Stereo Transmitter • FM25B Synthesized Stereo FM Transmitter •

SS70A • 20 SPEECH SCRAMBLER SS70A Quick Reference Page Guide Introduction to the SS70A ... 4 Circuit Description ...

SS70A • 3 SPEECH SCRAMBLER / DESCRAMBLER KIT Ramsey Publication No. SS70A Price $5.00 TABLE OF CONTENTS Introduction to the SS70A ... 4 C

SS70A • 4 INTRODUCTION The Ramsey SS70A is a complete two-way speech scrambler/descrambler with suitable inputs and outputs for scanner, two-way r

SS70A • 5 The audio input is amplified and filtered by the IC, then "mixed" with the carrier to produce both the sum and difference freque

SS70A • 6 RAMSEY Learn-As-You-Build KIT ASSEMBLY There are numerous solder connections on the SS70A printed circuit board. Therefore, PLEASE take us

SS70A • 7 SS70A PARTS LIST Sort and “check off” the components in the boxes provided. It’s also helpful to sort the parts into separate containers

SS70A • 8

SS70A • 9 SS70A ASSEMBLY INSTRUCTIONS  1. First, install switches S1, S2, and S3. Be sure that all legs fit through the circuit board before solde