signal one CX-7 Manual

MANUAL TUNE UP FOR THE SIGNAL/ONE CX-7 TRANSCEIVER

OBJECTIVE:

The
PA TUNING
When this condition is achieved, the
PUT control is turned up to maximum. Any other method of adjustment will shorten the tube life and result in poor
sounding transmission.

PRESETTING CONTROLS:

MANUAL/BROADBAND
CONTROL
CLIPPING
OUTPUT CONTROL
PA TUNING
LOADING
MODE
METER BUTTONS
CONTROL BUTTONS
TRANSMIT VFO BUTTONS
MHZ + VFO A
MIKE
TO 10 -----
RF GAIN

METER SCALES:

PLATE selected 0 - 5 Scale
selected 0 - 5 Scale
SCREEN

PRELIMINARY:

Turn on and allow minimum of 3 to 5 minutes warmup. Verify noise in receiver speaker. Press
button and verify 100 Milliamps

TUNEUP:

1. Press
TUNE
SECONDS MAXIMUM IN TUNE, then back to
2. Press FWD POWER
3. Press
SCREEN
just LOADING control to reduce meter reading. Readjust
reading, but not to exceed 1.0 meter reading, if so, reduce
4. Continue to advance
repead
PA TUNING
OUTPUT control to "0" each time.
5. Be sure to observe 5 second limit in
time required, direct a cooling fan to the finned heat sink, then 15 seconds in
6. Verify FWD POWER
as a maximum of "4.2" but any power less than this may be used by
meter reading is average power, so 25% of full scale is really maximum peak power.
7. current is not used in tuning tubes with Screen grids and readings up to 3.3 (330 Milliamps) are only im-
PLATE
portant on CW operation.
Rev. C.0

Manual Tune Up For The CX-7

control and the
LOADING
SCREEN
SWITCH
TO 3. ------ 50 Ohm Dummy Load Connected
AF GAIN
current (1.0 Meter), then push
PLATE
control button. Turn
OUTPUT
meter button and adjust
meter button and turn
OUTPUT
OUTPUT control for higher
for maximum
SCREEN
TUNE
meter reading can go to "4.2" or higher. This reading is only important on CW operation
control must be adjusted so the final amplifier is operating "Linear".
current will not rise over 12 Milliamps (1.2 on the meter) as the
= POINTER TO MANUAL
= 0
= 0
= Known Presets or 6
= Known Presets or 6
= USB or LSB
=
PLATE
= PTT
=
A
= Select band and frequency
= Turned off or unplugged (Will modulate on
= 0 - 500 Milliamps
= 0 - 50 Milliamps
control until current reads slightly less than 2.0 on meter. 5
PLATE
.
PTT
PA TUNING control for maximum reading.
control clockwise. If screen current rises over 1.0 on meter, ad-
PA TUNING
OUTPUT
SCREEN current. Reduce reading with
current until no increase in
and wait at least 15 seconds before going to
TUNE
TRANSMIT
button to return to receive.
PTT
control for maximum SCREEN
control and reset
LOADING
LOADING
current is possible. Return
SCREEN
TUNE again. If longer
is possible.
TUNE
control adjustment. On SSB, the
OUTPUT
TN12
OUT-
)
control
meter
control.
control and
TN12-1