Here's you'll find the complete alignment instructions for the HW-8 QRP transceiver. You can select and copy from this web site. Then paste into any word processor to produce a hard copy. Enjoy!

The following alignment procedure requires the use of a calibrated Receiver capable of receiving 7.0 to 7.25 MHz, an RF Signal Generator, and a VTVM with a RF Probe. If a Signal Generator is not available, use an on-the-air signal. Figure 1-3 is a schematic of a simple RF Probe which you can make if one is not available. CAUTION: A cabinet shell must be installed on the bottom of the Transceiver before you start the following procedure.

Refer to Figure 1-2 in the Illustration Booklet for the following procedures.

HFO (Heterodyne Frequency Oscillator)

Connect the RF probe of the VTVM to test point TP1. This is the lead at the indicated end of resistor R94, a 68k ohm (blue-gray-orange)

resistor.

Turn the transceiver on and press the 3.5 MHz pushbutton.

NOTE: You can reach the bottom slug in coils L17/L18 and L19/L21 by inserting the longer end of the alignment tool through the top slug; then on down to the bottom slug. Be careful when you do this so that you do not damage or turn the top slug

Use the smaller alignment tool and adjust the bottom slug in coil L17/L18 B to obtain a peak reading on the VTVM. Then turn the slug an additional 1/4 turn clock wise. The VTVM should read approximately.03 volts.

Press the 7.0 MHz pushbutton

Adjust the top slug in coil L17/L18 to obtain a peak reading on the VTVM. Then turn the slug an additional 1/4 turn couterclockwise. The meter should read approximately 0.3 volts.

Press the 14.0 MHz pushbutton.

Adjust the bottom slug in coil L19/L21 to obtain a peak reading on the VTVM. Then turn the slug an additional 1/4 turn clockwise. The VTVM should read approximately 0.2 volts

Press the 21.0 MHz pushbutton.

Adjust the top slug in coil L19/L21 to obtain a peak reading on the VTVM. The VTVM should read approximately 0.2 volts. Then turn the slug 1/4 turn counterclockwise.

Disconnect the VTVM from the Transceiver.

VFO (Variable Frequency Oscillator

Turn the calibrated receiver on and allow it to warm up. Tune the receiver to approximately 7.0 MHz.

Press the 7.0 MHz pushbutton on the Transceiver.

Connect one end of a suitable length of wire to the antenna terminal on the calibrated receiver. Loop the other end of this wire around coil L19/L21 as shown in inset drawing #2 on Figure 1-2.

Turn the Transceiver on and allow it to warm up for at least 30 minutes before you proceed with the following adjustments.

NOTE: In the following steps, you will zero beat the calibrated receiver; first against its own crystal calibrator, and then against the Transceiver. A zero beat is a point where the two frequencies being combined (or beat against each other) are exactly the same. As you approach zero beats, the tone caused by the two combined frequency will gradually decrease in pitch and volume until it stops. This point is very sharp so you must tune very carefully.

Set the calibrated receiver’s Function switch to the SSB or CW position Tune the calibrated receiver to 7.0 MHz. Then turn on its crystal calibrator and zero beat the receiver frequency against the crystal calibrator frequency.

Turn off the crystal calibrator. NOTE: Be careful that you do not change the setting of the receiver frequency.

Refer to inset drawing #1 of Figure 1-2 and insert the metal blade (#205-778) into the small end of the plastic nut starter. NOTE: Use the alignment tool that you made from the nut starter and blade for all trimmer adjustments. DO NOT use a screwdriver.

Turn the Transceiver tuning dial to 0.

Adjust trimmer capacitor C3028 until you hear a zero beat from the calibrated receiver.

Turn the Transceiver dial to 250.

Turn the calibrated receiver dial to 7.250 MHz.

Use the larger alignment tool to turn the slug in coil L9 until you hear a zero beat from the calibrated receiver. It may be necessary to turn down the calibrated receiver’s AF gain control.

Repeat the VFO alignment steps several times until the calibrated receiver’s dial coincides with the 0 and 250 marks on the Transceiver’s dial

Turn off the calibrated receiver and remove the wire from around coil L19/L21 in the Transceiver. The calibrated receiver will no longer be used.

MIXER AMPLIFIER

Turn the Transceiver tuning dial to 100.

Connect the RF Probe of the VTVM to test point TP2. This is the lead at the indicated end of R49, a 270-ohm (red-violet-brown) resistor.

Press the 3.5 MHz pushbutton and adjust coil L13 for a peak reading on the VTVM.

Press the 7.0 MHz pushbutton and adjust coil L14 for a peak reading on the VTVM.

Press the 14.0 MHz pushbutton and adjust coil L15 for a peak reading on the VTVM.

Turn the Transceiver tuning dial to 150.

NOTE: When you perform the next step, you may have to turn the coil slug several turns counterclockwise before you obtain a peak reading on the VTVM. Press the 21.0 MHz pushbutton and adjust coil L16 for a peak reading on the VTVM.

Disconnect the RF Probe from Test point TP2.

TRANSMITTER

Plug the previously prepared 50 ~ dummy load into the ANTENNA socket on the back of the Transceiver. (This may already be connected to the Transceiver.)

Connect the key to the KEY jack on the back of the Transceiver. (This also may already be connected to the Transceiver.)

NOTE: Use the alignment tool that you made from the nut starter and blade for all trimmer adjustments. DO NOT use a screwdriver.

Turn the screws in trimmers C95, C99, C103, and C106 clockwise until they stop turning. Do not force the screws.

Turn the screw in trimmer C95 1/2 turn counterclockwise.

Turn the screw in trimmer C99 1/8 turn counterclockwise.

Turn the screw in trimmer C103 1 turn counterclockwise.

Turn the screw in trimmer C106 1/4 turn counterclockwise.

Make sure the TUNING dial is set to 100.

Press the 3.5 MHz pushbutton.

Set the LOADING control on the front panel to the 12 o’clock position.

NOTE: In the following steps, the adjustments will be quite broad.

Key the Transceiver and adjust trimmer C95 for a maximum reading on the RELATIVE POWER meter.

Key the Transceiver and adjust the LOADING control on the front panel to obtain a maximum reading on the RELATIVE POWER meter.

Repeat the previous two steps.

Press the 7.0 MHz pushbutton.

Set the LOADING control to the 12 o’clock position.

Key the Transceiver and adjust trimmer C99 to obtain a maximum reading on the RELATIVE POWER meter.

Key the Transceiver and adjust the LOADING control on the front panel to obtain a maximum reading on the RELATIVE POWER meter.

Repeat the previous two steps.

Press the 14.0 MHz pushbutton.

Set the LOADING control to the 12 o’clock position.

Key the Transceiver and adjust trimmer C103 to obtain a maximum reading on the RELATIVE POWER meter.

Key the Transceiver and adjust the LOADING control on the front panel to obtain a maximum reading on the RELATIVE POWER meter.

Repeat the previous two steps.

Press the 21.0 MHz pushbutton.

Set the LOADING control to the 12:00 o’clock position.

Key the Transceiver and adjust trimmer C106 to obtain a maximum reading on the RELATIVE POWER meter.

Key the Transceiver and adjust the LOADING control to obtain a maximum reading on the RELATIVE POWER meter.

Repeat the previous two steps.

Turn the Transceiver off.

Disconnect the key and dummy load from the Transceiver.

RECEIVER

Connect a pair of headphones to the HEADPHONES jack on the back of the Transceiver.

NOTE: You may use a nearby accurately calibrated transmitter for the following adjustments. If you do use one, connect a small piece of wire to the Transceiver’s antenna socket. The small wire will act as a simple antenna. (You may also use an appropriate antenna.)

Connect a signal generator to the ANTENNA socket on the back of the Transceiver.

Turn the signal generator on and allow it to warm up.

Set the Transceiver tuning dial to 250.

Set the RECEIVER PRESELECTOR to 14.

Set the RF GAIN control to MAX.

Turn the Transceiver on and adjust the AF GAIN control for a comfortable listening level.

NOTE: In the following steps, as you approach the point of resonance of a trimmer capacitor or coil, the sound from the headphones will increase. As this occurs, decrease the output of the signal generator to the lowest level that you can still hear. This will prevent overloading the receiver.

Press the 3.5 MHz pushbutton.

Adjust the signal generator frequency to approximately 3.750 MHz or until you hear the signal in the headphones. The output of the generator may have to be quite high.

Alternately adjust trimmers C3 and C16 for maximum sound in the headphones.

Press the 7.0 MHz pushbutton.

Adjust the signal generator frequency to approximately 7.25 MHz or until you hear it in the headphones. The output of the generator may have to be quite high.

Alternately adjust trimmers C6 and C19 for maximum sound in the headphones.

Set the Transceiver tuning dial to 100.

Adjust the signal generator frequency to approximately 7.100 MHz or until you hear it in the headphones.

Adjust the RECEIVER PRESELECTOR for maximum sound in the headphones.

Readjust trimmer C6 for maximum sound in the headphones. NOTE: Do not adjust trimmer C19.

Press the 14.0 MHz pushbutton.

Set the Transceiver tuning dial to 250.

Set the RECEIVER PRESELECTOR to 14.

Adjust the signal generator frequency to approximately 14.25 MHz or until you hear it in the headphones.

Alternately adjust trimmers C7 and C22 for maximum sound in the headphones.

Press the 21.0 MHz pushbutton.

Adjust the signal generator frequency to approximately 21.25 MHz or until you hear it in the headphones.

Alternately adjust trimmers C9 and C24 for maximum sound in the headphones.

Turn the Transceiver off.

Disconnect the signal generator from the Transceiver.

This completes the "Transceiver Alignment,"