Ramsey Electronics HR40 Manual de instrucciones descargar pdf (Pagina 8)

FHT-1 • 8

RAMSEY Learn-As-You-Build KIT ASSEMBLY

There are over 200 solder connections on the FHT-1 printed circuit board.

That means your work could be 99% perfect and you could still have 2 or 3

cold solder points or solder bridges. Since this circuit is more sophisticated

than a direct-conversion HF receiver or a CW HF transmitter, a beginner or

casual amateur could have a harder time tracing a problem due to a poor

solder connection. Therefore, PLEASE take us seriously when we say that

good soldering is essential to the proper operation of your transmitter!

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 flow 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 start building!

• Use a 25-watt soldering pencil with a clean, sharp tip.

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

• Use bright lighting, a magnifying lamp or bench-style

magnifier may be helpful.

• Do your work in stages, taking breaks to check your work.

Carefully brush away wire cuttings so they don't lodge

between solder connections.

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Ramsey Electronics HR40 Manual de instrucciones Pagina 8