Kenwood AT-130 manual I19 M O l l

Adjusting the Antenna Coupler

The antenna coupler is used to match a trans- mitter to an antenna system when i t s SWR is too high (i.e., greater than 1.5:1 SWR).

a. Place the BAND switch to the same band setting as your transceiver (as shown in Figure

3-41,

Table 3-1shows approximate control positions for coupler adjustment.

Table 3-1

I BAND(MHz1 I R TUNE I X TUNE I

b. Set the CALISWR switch to the CAL (I) position.

c. Transmit and adjust the CAL control so the meter indicates CAL.

d. Place the CALISWR switch in the SWR) , ( position.

e. Ncw you will measure the reflected power.
Adjust the R TUNE and X TUNE controls
alternately for a good minimum meter indica-
tion. Reflected power will be close to zero as
a good match is achieved.
			--
	B. ANT System
		A. D u m m y load
TS-820o r other Transceiver		-

- - f	1	I	I	. - . - a	~.- 1
	I	i	0 0 0	A T - 120	ANT		1
			o o ! l	I- -		4-
I19 M I		I	o o o l l	I!	-	-	ll

First tune u p on

AD u m m y load.

Then check
antenna SWR.
_ ..	. . -

necessary.

r71--- .~

Coax.	INPUT
	Coax.
Ground Cable	Figure 3-3. Inter Connection

-Adjustalternately f o r minimum SWR reading.

4

BAND R TUNE X TUNE

cPULL LAMP @ ANTENNA TUNER AT- 130 .',

Figure 3-4.