G
OPERATION
Before starting any operation verify the tension in
the network supply plug corresponds to the tension
as set up in the KLV2000 supply, see pic. 8, (the
original adjustment is described on the back
stickers 9 pic. 2). Verify that a proper antenna is
connected to the ant connector of the Linear
Amplifier (8 pic.2).
The transceiver, used to guide the KLV2000, has to be
set before it can work coupled with the linear. When
the RTX set is carried out with linear on, the 12 switch
has to be place on OFF ( Lin ON indicator, switch OFF
16 fig. 1).
Place the KLV2000 commands as<follows: (Refer to
picture 1):
Power/ON .................................... OFF
Lin/ON ......................................... OFF
Pre/ON ........................................ OFF
Multimeter.................................... Va
Band ............................................ Prefer Band
Tune ............................................ See...1 page 6
Load ............................................ See...1 page 6
SWR Sens.............................O Counter clock wise
Switch on the Amplifier by the command Power/ON
(Position ON), A 2-3 seconds delay before a complete
lightening of the instruments is normal, be assured to
get a proper adjustment of the transceiver (TUBE
DEVICES), check the level of anodic tension on
<Amplifier Parameters > the pointer should indicate
aprox 2,5 on the lower scale (Va).
A different indication could mean a wrong supply
tension, switch everything OFF and check the tension
adjuster setup Pic.8
Be assured that the frequency band selector (3 pic. 1)
is on the appropriate band.
Commute <MULTIMETER> (6 Pic.1) on Ia, put the
transceiver power output control on minimum,
commute Lin/ON (12 Pic.1) on ON (switch ON of Lin/
ON 16 pic.1).
Push the microphone PTT to the transmitter on
transmission, KLV2000 commutes in transmission and
show the condition by the TX light (16 pic.1). Increase
the transceiver power control till reading 200 Ma (.2
Amp) on device 9 pic.1, adjust tune control (2 pic.1)
until you get the max output power read on the
wattmeter (7 pic.1), it corresponds to the minimum
absorbed anodic current (shown on 9 pic.1). Release
PTT and enter reception again. Wait for few moments,
push again PTT increase the power until you read on
the multimeter (9 pic.1) 400mA (.4 Amp) and adjust
alternatively the commands TUNE and LOAD (2 and 1
pic.1) to get the max output power on wattmeter, release
PTT.
ATTENTION !!! WHEN ADJUSTING DONT STAY IN
TRANSMISSION (KEY DOWN) FOR OVER 10
SECONDS WITHOUT INTERRUPTING BY MEANS
OF A RECEPTION PHASE LONG ENOUGH TO
PERMIT THE COOLING OF THE END TUBES. THE
EXCESSIVE HEATING CAUSES THE PREMATURE
EXHAUSTION OF THE TUBES.
Bring excitatory power (RTX) to about 100 W PEP and
check the linear adjustment. In this status the KLV 2000
provides its max output power, that has to correspond
to the dip of the anodic current (Ia).
During adjustment, and especially during usage, the
danger indicator
A
(16 pic. 1) has to be off, this light
indicates either the exceeding of 500 mA of anodic
current absorption or the protection for too high grill
current that can be dangerous for the tubes life. When
during tuning the grill protection is entered, decrease
input power and increase again only after adjustment.
The position of Tune and Load commands for the max
output power on a 50
Ω
load is indicated in the Table 1,
page. 6.
Now the SWR-meter adjustment can be effected.
Commute button 10 fig. 1 (Dir/Ref) in Dir (the variation
of indication of wattmeter is normal), press PTT button
and increase SWR Sens. control (4 pic. 1) to put the
pointer of SWR devices (8 pic. 1) to the bottom of the
scale, position
∞
, bring the command 10 on Ref, now
the indication of SWR devices (8) shows the SWR at
the KLV 2000 output.
During the use of the amplifier, the level of the stationary
waves (SWR) has to remain to an acceptable level,
never exceeding 3 and possibly lower than 1,5. A lower
SWR increase the power transfer therefore also the
antenna irradiated power, a SWR higher than 3 can be
dangerous for the life of the tubes.
When using in SSB, adjust the input power for an
absorbed anodic current of 0.2 0.3 A speaking at the
microphone, because the KLV 2000 devices indicates
the medium absorption of the Plate circuit, and the peak
are double of this.
For usage in AM FM FSK adjust the transceiver
power for an anodic current of 0.2 0.3 A, the carrier
not modulated and its usage without breaks (reception)
has to be limited to time sufficient to get the tubes
cooled down.
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