SBE SB-36 - Page 15

SBE SB-36 OPERATION MANUAL
20 100 Hz ON/OFF
Switch
A two-position switch which controls the 100 Hertz Nixie
tube. In the. ON position, the 100 Hertz Nixie tube
will be lit. In the OFF position the 100 Hertz Nixie tube will
be turned off.
21 "MHz" Band Selector An 11-position rotary switch used to select the desired
frequency band. The "A", "B" or "C" positions will result in no
transmitter output unless optional crystals have been
installed for non-amateur band use. The remaining positions
represent the specific low-end frequency of
the selected band.
WARNING: Do not change position of the "MHz" band
selector when the SB-36 is keyed for transmit condition,
as this will result in damage to the equipment, which is not
covered by the warranty.
22 Pre-Selector Control A control used to tune both the receiver RF front end and
the transmitter mixer and driver plate circuits.
23 VOX, REC-PTT, Send
Switch
A 3-position snap switch which provides for the following
functions:
In the VOX position, the built-in VOX circuitry in the unit is
activated.
In the REC-PTT position, the receiver will function until the
PUSH-TO-TALK button on the microphone is depressed to
activate the transmitter. When placed in the SEND position,
the transmitter is automatically keyed. This position should
be used for transmitter tune-up.
24 CARR Control A potentiometer that varies the level of carrier re-insert. This
control will adjust the transmitter power output when the unit
is in the CW mode of operation.
25 ALC Control A potentiometer that varies the gain of low level transmit
stages in the transceiver to prevent fiat-topping or over
driving the final amplifier tubes.
26 BIAS Control A potentiometer that varies the grid voltage to the final
amplifier tubes. This control should be used to set the final
amplifier plate current at 50 milliamps idle current.
27 External VFO Jack A connector for applying the output of an external VFO to
the transceiver.
28 KEY Jack A connector for applying the output of an external paddle
key.
29 VOX- SENSE Control A potentiometer that varies the attenuation of the audio input
being applied to the VOX amplifier circuitry. Its function is to
adjust the threshold level of speech that is required to key
the transmitter.
NoobowSystems Lab. Tomioka, Japan 2003 http://www.noobowsystems.com/ Page 15 / 56