Specifications

SMARTUNER MANUAL 38
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA
© Nov2000 SGC, Inc. P.O. Box 3526, 98009 Fax: [phone] Tel: [phone]
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the oil-can type because you can guess how much power is being output, you can see
the voice modulate the SSB (the light will flicker with your voice peaks), and you can
tune the transmitter for maximum output (if the transmitter is an older model that
requires tuning).
Before building or using the light-bulb dummy load, remember that these models
typically don't dissipate the transmitter's output as well as an oil-can dummy load. The
result is that RF will "leak" out; I have heard a few stories of amateurs who were heard
around town while operating their transmitters into a light-bulb dummy load. If you
use this system, make sure that you test the equipment on a clear, harmless frequency
(NEVER test with the transmitter set on an emergency frequency, such as 2182 KHz).
SGC recommends that you build the light-bulb dummy load with the following parts
(although I have made one with an old light fixture and a makeshift version with just
alligator clip leads and a light bulb):
* AC socket to cable with a PL-259 connector (for transceiver)
* AC socket to cable with alligator clips (needed with coupler)
* Light bulb to AC adapter
* 75 to 125 watt light bulb, 120 to 220 VAC
* 100 watt radio transceiver
* SG-230 coupler (optional)
f
For transceiver
For coupler