Specifications

ASSEMBLY INSTRUCTIONS
PLEASE READ CAREFULLY BEFORE PROCEEDING!
NOTICE
This device will operate as advertised when properly constructed, installed, and adjusted. CBC INTERNATIONAL has no
control over the skill of the purchaser; therefore no warranty can be given. We will repair units built only from our own kits for
$25 prepaid with the returned unit. NO BASKET CASES PLEASE!
This device is intended for educational purposes, 10-Meter Amateur use, or 27 MHz receivers only. Supplier assumes no
liability for improper or illegal use.
Proper soldering is essential. Poor soldering is the biggest cause of problems. Finished joints should look shiny, never dull.
Use only a small iron (25-45 watt) with a very fine round or slot tip to avoid shorts.
Assembly consists of stuffing the parts into the proper PC board holes, as illustrated in the X-Ray View drawing, Page 10. Check against the
schematic circuit diagram if you’re in doubt about the correct holes. Push all parts down tight, wiggling back and forth if necessary as you press
down. (See photo, Page 11.) The diodes and resistors will bend naturally to the proper hole spacing.
NOTES
1. Unless you’re moving the EXPANDER 160 unit from one type of synthesizer circuit to another, you will save time and trouble by
installing the right jumper wires in the first place. Decide which installation type you need, then insert the proper jumpers when stuffing
and soldering all the other parts.
2. Observe correct diode polarity. The banded diode end is the cathode [—]. This is shown in the sketch above and in the X-Ray View.
Diodes also have [—] marks etched on the PCB.
3. Install transistors correctly. See sketch. Match the flat side of the transistor body with the flat side painted on the top of the PC board.
The emitter leads will be to your left.. If in doubt, check against the X-Ray View or the schematic. With the flat side facing you, the
leads will be (left to right) Emitter, Base, Collector.
4. Use cut off parts leads for the jumpers. Determine proper jumpers as described later.
5. Capacitor locations C6, C7, and C8 include extra holes to match different spacings if necessary.
6. Wires: Install the RED in [+], BLACK in [—], and short YELLOW in “RF” holes. An extra 12" wire is included for switch mode
option, as well as the 5-conductor ribbon cable for your switch. Match cable to your switch and crystals with the schematic diagram.
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EXPANDER 160 PAGE 2