Daiwa RF-660 User manual

INSTRUCTION 11ANlTAL
Hodel RF-660 Quality RF Speech Processor
for Mobile/Home operation.
General Description:
The RF-660 is an RF speech processor, that gives 6 dl3
improvement in talk pO\·ler. This unit has the follovdng
features:
1. Low distortion with clipping at an RF frequency.
2. Easy installation to microphone lines.
3. Completely solid-state.
4. Splatter free performance.
5. Level indication.
6. Built-in monitoring circuit.
Specifications:
Talk power better than 6dB imp::::-:wement.
Clipping threshold Less than 2mV at 1}::'-iz.
Frequency response Approx. 300-3000 -:::z c.t 12 dB .dm·m.
Distortion Less than 3% at 1kHz, 20 dB clip.
Output level HElre than 50mV at 1k:::z.
PovJer requirement DC 13.5V 50 rnA (-~titen n8 input signal)
Dimensions 90(H) x 25(H) x 92(D) rr:/m
Fet weight 36o g
LED
cl}pping level indicator Power Switch
==-
Lights vlhen power switch "ON". "o:'J
11
LED lights.
Indicates proper clipping level.
Indicates over clipping level. "OFF" Pm'-ler is removed
Eic. is connected direct
to transceiver.
1'1ic. input
for microphone.
!-Toni tor Jack:
Earphone connection for
monitoring of processed
speech.
Clipping level
control.
c~~= decreased clipping.
C\:l: increa~Beci. clipping.

Rear View
OUTPUT LEVEL control --------.Output lead with plug:
Adjust output level Connect to mic socked;
CC\1: output low, C\if: output high. on transceiver.
DC povJer cord
Red: 13.5V DC Positi
Black:· DC Negative.
(vliring)
Mic. cable connection.
GND
PTT
PTT SWITCH
MIKE
GND
MICROPHONE
Fig. -1
It is necessary to check the microphone wiring before o~erating
RF-660. The microphone cable connection to the RF-660 is
sh01m in fig 1. Check your microphone connector and its wiring
to ensure the. t they can be used 1:ri th the HF-660. If your rnic-
ronhone connector cannot be used vri th the RF-660 remove it and
connect the input connector to your microphone cable as sho'>·m in
Fig 1. The output connector or the RF-66o is 2.lso '::ired as FiS'1
If it is not usable i·rit':l your Transceiver, the O''tnut connector
should be reHired to the microphone connector as shovm in the
instruction manual of the Transceiver you are using. This
completes the Hiring. The RF-66o is novr ready for operatiam.
Operation:
It is recommended that initial tests and familiarization of
the RF-66o be done with your T~nsceiver connected to a
dummy load. Be sure the power switch of the RF-660 is in the
"OFFn position. Connect the microphone to RF-66o input, and the
output lead to Transceiver ·in:rmt as shown in fig 2. The mic-
rophone line is connected directly to the Transceiver input when
the gain control of the RF-660 is in th~ full counter-clockwise
position. Check the operation of the micrphone to ensure it
operates properlyJt If it does not function properly, check
the wiring o£ the inter connection cable (see fig 1.)
Set the gain control to the full clockwise position and the
output control tn >the :full counter-clockwise position. Turn

on the power Sid tch. In SSB and .41-: modes, adjust the output
level of the output control with audio until the ALC meter
peaks around the-right edge of the red zone.
If your Transceiver does not have an ALC meter, a plate current
meter or an output po1-.r~r meter may be substituted. 'l!i th an
"FN" Transceiver, set output just below the maximum allm-.rable
deviation. Adjust the microphone gain Control 1vi th audio
(keeping microphone more than ten centimeter from your mouth)
until the level indicator lights up (second position). ~Ji th
this adjustment, the talk power of the processed voice increases
more than L1 times comnared Hith you.:c: original voice.
'l'he IlF-66o is now ready to be testec~ on the air. It is
advisable to try the HF-66o in both "ON" and "OFF" position of
the Power S'.d tch and check for the <:mdio a_uali ty of your
transmitter signal.
If there is a complaint of bel1m'lin:c: or pumnin:s, ease off
slightly of the kain control.
CAUTION.
Splatter can resul:t from improper adjustment of the output
control. 'l
1
he output control setti:J.g should be checked
2.s frequertly as nossible to ensure that it is set at the
proper level.
Keep the microphone more than 10 centi2eter from your mout~
ivhen using the R.F-660.
Tlicrophone
Transceiver
(Fig 2)
I~ DAIWA CORPORATION