Elecraft XV Transverter Owner's Manual - Manual (Page 34)

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Key the 28 MHz rig to provide transmit I.F to the transverter and
adjust the following inductors for maximum voltage at TP5. If the voltage
exceeds 10 volts, turn R22 (Input Atten Adjust) counter clockwise (CCW)
to reduce the voltage. The front panel Power Output LEDs may begin
lighting up as you peak the inductors:
XV50, XV144 or XV222:
L12, L13, L14, L15, L16 and L17. The adjustment of L17 is
very broad. Maximum output may occur with the slug removed.
If so, leave the slug out.
XV432:
L15, L16, L17, the three adjustments in FL1 and the three
adjustments in FL2. The adjustment of L17 is extremely broad
because of the wide bandwidth of this filter. Maximum output
may occur with the slug removed. If so, leave the slug out.
Repeat the above adjustments several times for maximum voltage at
TP5. Some of the adjustments interact. Adjust R22 (Input Atten. Adjust)
CCW as needed to keep the voltage below 10 VDC.
Part VII – Power Display LED Calibration.
Calibrate the front panel Power Output display as follows:
Set your 28 MHz rig transmit frequency to 28.0 MHz. If you are
using an Elecraft K2 or K3 in transverter mode, the frequency displayed
will be 50, 144, 222 or 432 MHz. (Normally you’d not use an XV50 with
an Elecraft K3 since the basic K3 covers the 50 MHz band.)
Set your 28 MHz rig to the transmit level that corresponds with 20
watts output from this transverter (1 milliwatt, 251 milliwatts or 5 watts).
This depends upon how you configured the I.F. power level jumpers in the
Installation procedure.
i
Do not exceed the recommended maximum transmit power
from your 28 MHz rig, depending upon how you configured the
transverter jumpers. Exceeding the maximum level may damage the
transverter.
Key the 28 MHz rig to provide a transmit signal and adjust R22
(Input Atten. Adjust) for 20 watts indicated on your external wattmeter.
When finished, do NOT change the output power from your 28 MHz rig
before performing the next step.
Key the 28 MHz rig to provide a transmit signal. With the external
wattmeter indicating 20 watts, adjust pot R10 (Power Cal) in the upper left
quadrant of the RF Board so that the yellow (20 watt) LED on the
transverter front panel just lights.
Part VIII – Receiver Input Alignment.
i
Accidentally transmitting while performing the following steps
could destroy your noise generator.
On your 28 MHz rig:
If possible, turn the AGC off.
Set the receive frequency to 29.0 MHz. If you are using an
Elecraft K2 or K3 in transverter mode, the frequency display will
be 51 (K2 only), 145, 223 or 433 MHz.
Place your DMM in AC volts mode and connect it across the phone
or speaker output of your 28 MHz rig to measure the audio level.
Connect a noise generator to the transverter antenna input. Normally
this will be the ANT connector unless you wired your transverter for
separate transmit and receive connections (see page 20). In that case,
connect your noise generator to the AUX connector.
Turn your noise generator on. You should see an increase in the AC
voltage reading on your DMM.
Adjust trimmer capacitor C1 in the upper left quadrant of the PCB for
maximum voltage shown on the DMM. You may need to reduce the input
from the noise generator to see the peak clearly.