Ramsey Electronics SS70A manual Now, lets get building

Page 6

RAMSEY Learn-As-You-Build KIT ASSEMBLY

There are numerous solder connections on the SS70A printed circuit board. Therefore, PLEASE take us seriously when we say that good soldering is essential to the proper operation of your scrambler! Following, are a few quick tips to make the assembly process a bit more enjoyable.

•Use a 25-50 watt soldering pencil with a clean, sharp tip. Wipe the tip often on a damp sponge to keep it clean for easier soldering.

•Use only rosin-core solder intended for electronics use.

•Use bright lighting. A magnifying lamp or bench-style magnifier may be helpful.

•Keep an eye open for similar components. Hmmm, is that a 1K ohm or 10K ohm resistor?

•Do your work in stages, taking breaks to check your work. Carefully brush away wire cuttings so they don't lodge between components.

We have a two-fold "strategy" for the order of the following kit assembly steps. First, we install parts in physical relationship to each other, so there's minimal chance of inserting wires into wrong holes. Second, whenever possible, we install in an order that fits our "Learn-As-You Build" Kit building philosophy.

For each part, our word "Install" always means these steps:

1.Pick the correct part value to start with.

2.Insert it into the correct PC board location.

3.Orient it correctly, follow the PC board drawing and the written directions for all parts - especially when there's a right way and a wrong way to solder it in. (Diode bands, electrolytic capacitor polarity, transistor shapes, dotted or notched ends of IC's, and so forth.)

4.Solder all connections unless directed otherwise. Use enough heat and solder for clean, shiny, completed connections.

Don't be afraid of any pen-style soldering iron having enough heat to damage a component.

5.Trim or "nip" the excess component lead wire after soldering.

NOTE: Save some of the longer wire scraps nipped from resistors and capacitors. These will be used to form wire jumpers (JMP1, etc.) to be soldered in just like parts during these construction steps.

Now, let's get building!

SS70A • 6

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Contents Speech Scrambler Ramsey Transmitter Kits Speech Scrambler / Descrambler KIT Introduction SS70A Circuit DescriptionOSC Now, lets get building SS70A Parts List Resistors and PotentiometersSS70A SS70A Assembly Instructions SS70A SS70A Testing the SS70A CongratulationsConfiguring the SS70A inputs Typical HOOK-UPSTape Recorder Connection SS 70ALoop-through Audio Test Troubleshooting Instructions What if I CAN’T Descramble Something I HEAR?Conclusion SS70A Parts Layout Diagram Ramsey Kit Warranty Required Tools Estimated AssemblySpeech Scrambler SS70A Additional Suggested Items
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