Connecting A Linear Amplifier - Yaesu FT-990 Operating Manual

Station
lustallation Connecting Extetnal Accessories
DATA
10. 0 k!il
13.SV
Linear Amp T/R Switchjng Options on the REMOTE Jack
=
FT-990 non-OSK Linear
Amp.
0
~-
-,.--.-,.o;l
._1
L
J -
0 ~
~ $
00
~
EXT AL.C
1
ANT
Cmmecting a Linear Antplifier
If
usfng an ft.-7000 wiU' Lhe
Fr.9.90,
use optional cable Di\00019 to pro\(idec,1utomatic band selection
for th,~Jlin$, ~s.W~,?Il ~
QSK
L/r switching Ql:.Introl.
For
aJl)!
ether lil)l)ar ampliTier, t/ r
switc\;Un~ is
provided
by
thE!
REMoTE
j~ck (page ~3}.
t'o
clelermine
whicn pills
ro uset f(rst petermine
Ute
ur.en circuit vOltage and:
do~ed
circuit current requirements or
lhe
t/
r switching line
fOr
thdinear.
If the
voltagEriS.AC oi
abov.e50.
V:OC,
or if
theocurrent
required is
more
thl)n
50P
mA, switch
S6~01 rnt~sl
be set [o
the
RY posl;lion to el\abJil.the intl)mal teli!y
(S9801
1:9
·set to the TR position to .disable the relay at the factory, see page 1·1). Otherwise, if the linear's
ryl(juirement~ arii! Bet~wth~~ej
connEfc::lthe
(>l:lsftiye ~~ r
«it\trollirtc
tiom
th~
lirrear
to pin~
of the REMOTE
jaek<,lmd the nep1Live side of thi.S line
to
pin3
(~und) .
Also, if
ytllrr linear-'s requirements are tvithin
the1\have rang-e,
and
if
it
iS
d~ignec!
for
run
\)rea'k-in (QS:'K5
<:>peration,
you
~·ill
need
to connect lts
exciter•enableo\1
~ul
to pin 8
of
I he
~D
DATA
jat.k.
With a
plug
installed in
_thl;~
jaCk, the l;rartsmitteris
normally diSilbled, and ph\' 8 float!> at
about
5 vol!s.
By
grounding
pit\
8-
(to )'in 3), the
QSK
linear
enables the trtmsmittllt (U.tis
circuHpre
ents
u,e Ff-990 fTom
~xc(ting
the
linear
b~>'fore
kjs
I'eady
to
send).
Noh~
that the
Fr-99'0
will not transmit !fa plug is installed in the
BAND DATA
jack and pin 8 is1lol
,graundeij,
WiU,
lhe relay enabled? tfie Fr-9!i0 can suppOrt non-QSKllneilr
t/r
voltage up t;p.125
VAC
@200
mA
1
e,r DC
v(lltage up
tt>
220 V@ 300 n\A,.or
ct~~-tircu.Jh:;hrr(lnt
up to 2 A With QC
volta:ge~p
to
~m:v.
Use pin 5 of the·
REMOTE
jack
(:reiay
comJROn). , .and pin 4
(closed-on-transmi~l,
after
se tling ·S6801
to the
IW p,Oilllion. C9Q
flol aUitfflpi
QSK
Oftell!tjpn
tuith
a lhtetJr
if
its
~wit.c11iltg,requires
tile relay
£!!iilP/IiJI.
page.9