CQL 632 - Storno Radio

Storno
secondary auxiliary winding furnishes a positive
auxiliary voltagE.' for the following series regulator.
S~ries Regulator
The s~ri~s r~gulator consists of a series transistor
Q3. a control transistor Q4. and an amplifier
transistor Q5.
The bas~ of the amplifier transistor receives,
via an alignment potentiometer, a portioR of the
stabilized output voltage. In the emitter circuit
there is a reference diode, E8, and DC "oltage
at this point is compared
with the base voltage.
The collector of the amplifier transistor connects
to the base of the control transistor. If the output
voltage begins to increase,
so ~.ill the collector
current of the amplifier transistor, and the base
voltage for the control transistor will decrease.
This will cause the base voltage for the series
transistor
to decrease and the voltage drop
across the latter to increase,
the output voltage to decrease.
thereby causing
The output voltage
is adjusted for -24 volts by means of alignment
potentiometer R18.
In order to protect the transmitter-receiver
sections against over-,,'oltage
in the case of
defects in the series regulator, a zener diode
across the output of the regulator circuit prevents
the voltage from exceeding a certain
potential
(approx.
30 volts).
Storno
1ff'-
t!ra."lsmit r~lay ~.ill release before the antenna
fhirt relay on completion of a tra!1smission.
When the transmit relay is operated, the antenna
I
shift relay (located
outside the power supply unit)
is energized \ia the DC path through diode E10
~d the transmit button to earth. This occurs
$imultaneously with the operation of the transmit
relay, but since the operating time of the antenna
shift relay is sh°x:ter than that of the transmit
relay,
the antenna will be connected to the transmitter
before the latter begins to operate and
fan deliver any power. On switching to receive,
~he transmit relay will be de-energized before
~he antenna relay due to the fact the latter
relay
remains operated via contact set a3 of the trans-
~it
relay.
Technical Specifications
Supply Voltages
Measured at the fuse holders.
6V
12 V
24 V
Output Voltage
Regulated, -24V
VoltagelMinimurnl
5V
10 V
20 V
NorninallMaxirnurn
6.3 V
12.6 V
25.2 V
7.5 V
16.5 V
33.0 V
Output Voltage Variation
For temperature and load variations.
Less than % O. 6 V.
Output Load
Receive, max. 0.3 A
Transmit, max. 1.4 A.
Output Voltage
Ripple-
Less than 20 mV p-p.
The transmit relay (ReA) is powered by thEstabilized
24 -volt s'.:pply. It serves the triple
purpose of switching -he supply voltage back and
forth betwE-en the rec:'-"i\t:'r and tra!1s:nittt-. sections
shorting a fl'edbac:k rpsi~tor in thl' DC
COn\il'rt~I' un trans:'.ilt, an,j :5,'cur:nl:: that the
IOperating
37.561-1--:1 ,61-1':1
37