FIXED CHANNEL CRY ST AL INFO RMATION
Two fixed channels may be used with your FT-
10 1 ZD, using optional crystals. Crystals are
available from your Yaesu dealer. Cryst als must
meet the specifications shown in Tab le
2
,
and
must fall within the operating range 5 500 - 5000
kHz. Frequen cy calculation is made from the
formula
F
=
F - F
x
1
0
where F x is the crystal frequen cy
F is a constant derived from Table 1
1
F0 is the operating frequency .
For example , let us say it is desired to operate on
7 19 9 kHz LSB. Referring to 11abl e 1 , we see than
for 4 0 meter LSB , F
1
is 1 2 5 0 1 . 5 kHz. Subtracting
F
0
(7 1 9 9 kHz) from F
1
(12 5 01. 5 kHz) yields
530 2 . 5 kHz, the crystal frequency (Fx) .
For operation on 2 1 4 20 kHz USB, compute the
crystal frequen cy as follows :
Fx
=
2649 8 .5 - 2 1 4 20
=
5 07 8 . 5 kHz.
Inspection of the values of F
1
in Table 2 will
reveal that the 7199 kHz crystal for LSB will work
on 1 419 9 kHz , 21199 kHz, etc. Of course , LSB is
not norm ally used on these bands. If the operator
swit ches to USB, the operating frequency will be
moved 3 kHz (in this case, to 1 4 19 6 kHz , 2 1 196
kHz , et c.). If the move is m ade from LSB to CW,
the frequen cy will move 2 . 3 kHz down .
-16-
U S B
L S B
c
w
1 6 0 m
6 9 9 8 . 5
7 00 1 . 5
699 9.2
8 0 m
8 99 8.5
9 0 0 1 . 5
8 9 9 9.2
4 0 m
1 2 498.5
1 2 50 1 . 5
1 2 49 9. 2
2 0 m
1 9 498.5
1 9 50 1 . 5
1 9 499. 2
1 5 m
26498.5
26 50 1 . 5
2649 9.2
l O m A
3 3 49 8.5
3 3 5 0 1 . 5
3 3 4 9 9 . 2
l O m B
33 998.5
3400 1 . 5
3 3 9 9 9.2
l O m C
3 4 4 9 8 . 5
3 4 5 0 1 . 5
3449 9.2
l O m D
3499 8.5
3 5 0 0 1 . 5
3499 9.2
Table 1
Type
HC-25/U
Load Capacitance
30pF
Series Resistance
25 Ohms or less
Static Capacitance
7pF or less
Drive Level
5mW
Table
2