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closes,
shorting the coil of Kl to ground,
thus stopping the
operation of the time constant circuit.
After this elapsed time
of ten seconds,
the unit must be reset either remotely or by
the resat button located on the front panel of the 1KW driver.
It is necessary to wait approximately 15 seconds for the element
in K4 to cool before you can expect another three recycles.
Relay K3 performs three functions,
the aforementioned closing of
K2 when K3 is energized and also to supply 150 V.
DC to potentio-
meter R1 in an overload condition.
It also breaks the 230 V.
AC
which supplies the high voltage contactor coil.
In an unenergized
condition K3 breaks 130 V.
DC to Kl through Ri and maintains coil
voltage to the high voltage contactor.
Also,
the time delay
relay K4 has operating voltage removed which should increase the
operating life of this relay.
K3 is operated by 6 V.
ILC which is
supplied by the unit.
One coil terminal is tied common to the
6 V. AC transformer and the other coil terminal is tied in series
with a parallel string of overload relay contacts which return
to the other side of the 6 V.
AC transformer.
Resistor R4 acts as a surge resistor while R2 is merely a bleeder
resistor.
The two switches and one push button which control the recycle
unit are mounted on the 1KW driver control panel.
The operation
of the push button acts as a manual reset.
It is a normally
closed switch, which when open, removes 150 V.
DC from the 3.5K
resistors in series with the coil and overload potentiometers of
the overload relays.
These relays then open to again permit
operation of the transmitter.
The " local- remote" switch opens the circuit for the remote " on"
function,
thus placing the transmitter in a local operate con-
dition only.
The " tune- operate" switch performs two functions,
in " tune"
position it shorts out the coil of Kl in the recycle unit,
thus
making the unit inoperative.
In " operate position",
the short is
removed from the coil of relay Kl.
When the 1KW transmitter is
used as a driver for a higher power amplifier, the " tune- operate"
switch also performs the following functions.
It supplies 240 V.
AC to the manual push button on the P.A.
high voltage control
panel when in tune position.
In this position the driver and
P.A.
high voltages must be turned on independently.
In " operate"
position the short is removed from the coil of Kl and the 240 V.
AC is removed from the P.A.
high voltage push button on the F.A.
Instead 240 V.
AC is supplied to one contact of the K809 under
drive auxiliary relay, which when closed, turns the P.A.
high
voltage contactor on.
1/27/61.
-2-
M-6023
Automatic Recycle Unit.
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