Ramsey Electronics FZ-146 Specifications download pdf (Page 70)

FX 146 • 70

21. Use the extra spaces provided throughout this manual to write down the

details of any changes or revisions noted on additional sheets that may

be supplied with your kit.

22. You will be installing various wires for switches, controls and jacks very

early in the assembly procedure. This is contrary to normal building or

manufacturing practice but will permit progressive testing of completed

stages. Follow the suggestion at the end of Stage CR for tying down

these wires for protection and your convenience during further assembly

work.

23. Examine your FX- circuit board. Notice that the side with silkscreened

parts outlines is covered almost completely by tinned copper or "foil."

This is called a groundplane. This side is the Top or COMPONENT

SIDE of the board. All parts (except SMT C75) will be mounted on this

side. The other side has most of the printed circuit traces and is called

the Bottom or CIRCUIT SIDE.

ABOUT THE WIRE SUPPLIED WITH YOUR KIT:

Your kit parts include lengths of wire for making all needed connections from

the PC board to the controls and jacks. Because there is nothing critical in

the functions of these wires, the color and style of wire lengths actually

packed in your kit may vary. You may receive lengths of 2 or 3 conductor

wire (such as speaker cable or ribbon cable) or a supply of simple single

conductor hookup wire. Use the heavier gauge wire for the power supply

connections in the following steps, saving the lighter gauge wire for jacks

and controls. The bare wire is used for constructing the diode matrix for

frequency programming and for making a few coils and RF chokes. The

piece of thin, enameled "magnet" wire is to be wound on the small "toroid"

coil in Assembly Stage "CR."

"TINNING" is the process of heating the stripped end of a wire and LIGHTLY

flowing solder so that all strands are bonded together. This practice, while

not essential, generally makes for easier soldering and physically stronger

connections.BROKEN WIRES are the primary cause of malfunctions in ham

equipment and computers! Please follow our instructions in Stage CR

(PAGE 27) for securing completed cables to the PC board temporarily so

the connections will not get damaged during further assembly.

IMPORTANT NOTE REGARDING FLEXING WIRES: In Stages A, B, CR,

and M, you will install numerous wires from the PC board for panel controls

and jacks. Repeated flipping of the board during assembly can damage

these wires and also become very annoying during kit assembly. PLEASE

tie the wires down as noted on page 27, using one of the cable ties provided.

Take your time, learn about what you're doing and ENJOY your FM

Transceiver project!

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Ramsey Electronics FZ-146 Specifications Page 70