DID TEURS

J-
u n
........."o IuS
0/10 CIl Ys . a~ l a ~ .
' ~S E ~ T S E ~'U
CHO. E " CapaCITOR
TO CHas s ," G R O U ~O
~ - ..,.-
vUlaBlE C a .a c "o ~
Fig. 3. VXO operation with the Midland 13-866.
non can be inc reased by
removmg TR8 from the circuit.
Addi ng add itional cha n­
nels by using a 4PDT switch
is accomplis hed by removing
the green, o range, blue,
and black leads going from
the selecto r swi tc h to the
14-MHz crystals on the
c hassi s Connect these
wi res as d iagramed in Fig. 2.
With the switc h down, the
24 low c hanne ls will be obtained
With the switc h in
the up position, the upper
range can be used.
For frequenci es other
than, or in addition to, the
normal 73 band plan, the
basic conve rs io n has a
usable range of about 800
kHz without retuning.
VXO operation with this
radio can be obtained by
li fting the ground bus of the
14-MH L crysta ls an d inserting
a 1().-uH choke and a
S-So-pF variable capacito r
in series with the crystal bus
to chassis ground, as In Fig.
3. This trick will work With
any fundamental crysta ls
up to about lbMHz . Do not
attempt to use it on crystals
operating in the overtone
mode because severe instability
wil l resul t. _
~ " Lunar's new 2M 4-40P
Linearized Amplifier
makes your hand-held
synthesized transceiver
a GIANT!
1 to 4 WATTS IN-
10 to 40 WATTS OUT.
• Can be used with any
1·5 watt radio,
• Uneartzed so It's
compatible with SSB.
• Has pre-amp lOt' receiver
portion to Incre.se power and
clarity of Incoming signals.
• Amp and pre-amp functions
Independenlly controllable.
• Remote conlrol capabUity•
• Regulated voltage output as
required by the FT 207A and
TR2400 to conNl'Ye bauery pack.
• Turns your 1-4 waU transceiver
Into a higher powered base
or mobile station.
• Made with the quality and care
that has made Lunar the leader
In linearized amps.
8S Kurtl Street. Suite 10. San Diego, CA 92110
ephone 714 299-9740 Louis N, Anclaux
elex 181747
WB6NMT
73 Magazine · April, 1981 105