Specifications

SMARTUNER MANUAL 36
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]
E-Mail: [e-mail] Web Site: www.sgcworld.com
Weatherdeck mounting can be used. Years of experience have shown that inside mounting or
even splash-proof mounting is preferred, particularly in cold, damp environments. In tropical
use, shielding from direct sunlight is desirable.
The base of the antenna should be connected to the high voltage feed-through insulator on the
housing. Note that this insulator is not designed to support heavy mechanical loads. If such
loading is encountered, use a strain insulator.
The ground system should be connected to the 1/4-inch stainless steel stud protruding from
the bottom of the housing. Connection to the ground system is extremely important to a
successful installation. Ground runs of over a few inches should be made from 4-inch-wide
copper strap or larger. The actual ground system should be as good as possible, as the ground
is an integral part of the antenna system. See section 5.3 on grounding. However, couplers in
general require the antenna parameters to be within the range of the tuning parameters or the
coupler will not find a satisfactory match. The computer in the SMARTUNER cannot second-
guess the installer.
A proper antenna/ground installation is of great
importance: regardless of whether your station
is a base station, marine, or land mobile.
6.5 Electrical Checkout
After the SMARTUNER antenna coupler has been installed, the SSB transmitter should be
adjusted to the highest frequency desired, and a directional watt meter (e.g., Bird Model 43)
should be inserted into the transmission line. The transmitter should then be powered. The
SMARTUNER will begin to tune when RF power is applied, and you will hear a “clattering” of
PC-mounted relays. If the antenna length and ground parameters are within range, the relay
noises will stop when just a few words are spoken, and the reflected power on the watt meter
would indicate a value of better than 2:1 VSWR. The “TUNED” LED, which is mounted on the
PC board, will light, and if there is a remote “TUNED” indicator, it will also light.
12 volt power source
SG–2000 HF radio
(View: Back panel of unit)
Watt meter
SG–230
Antenna
Counterpoise
Terminal block
for DC power
cable
Smartlock
SG-2000 -->SG-230
Black (of coupler cable) = ground - Pin 1
Red (of coupler cable) = +12 VDC - Pin 2
White w/Black = tuned indication - Pin 3
(Optional)