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General| Tuning | VFO |
|---|---|
| Type | QRP Transceiver |
| Mode | CW |
| Weight | 12 oz (340 g) |
| Receiver Sensitivity | 0.5 uV for 10 dB S+N/N |
How to get help via web, forum, or phone for construction or operation.
Details on returning the unit for repair, including shipping instructions.
Details warranty coverage, exclusions, and limitations for the product.
Describes the KX1 chassis, printed circuit board, and component layout.
Crucial safety and setup information for handling sensitive components.
Recommends checking all parts against the provided list.
Suggests solder types and warns against corrosive fluxes.
Details proper soldering technique for good joints.
Specific instructions on using IC sockets, including warnings.
A critical safety and preparation checklist before assembly.
Detailed steps for installing resistors R8, R28, R6, and R7.
Steps for installing resistor packs RP5, RP2, RP4, RP3, and RP1.
Steps for installing diodes D2 and D3, including orientation.
Instructions for installing the 28-pin socket for U1.
Steps for installing capacitors C39 and C31.
Steps for installing capacitors C30, C6, C37, C12, C25, C24, C32, C33, C55.
Steps for installing capacitor C38.
Steps for installing capacitors C10, C7, C53, C23, C20, and C35.
Steps for installing crystal X1.
Steps for installing the white LED D1.
Steps for installing the DC power connector J1.
Steps for installing the two-pin plug P1.
Steps for installing jack J3 on the bottom edge.
Steps for installing pushbutton switches S5, S4, and S3.
Steps for installing slide switches S2 and S1.
Steps for installing voltage regulators U8 and U9.
Specific instructions for installing integrated circuit U9.
Steps for installing transistor Q7.
Steps for installing integrated circuit U3.
Steps for installing the 3-digit LED display DS1.
Steps for installing the encoder Z1.
Lists specific resistance checks to be performed with a DMM.
Covers installing U1 and Z1, including critical ESD precautions.
Connects power, sets switches, and prepares the unit for testing.
Lists specific DC and AC voltage checks for critical points.
Explains the dual function of switches activated by tapping or holding.
Details how to navigate and change unit settings via the menu.
Continues explanation of switch functions and combinations.
Continues menu navigation and parameter adjustment.
Steps for installing resistors R19, R21, R14, R18, R29, R5, R20, R15, R25.
How to identify the seven molded inductors by their color codes.
Steps for installing inductors L4, L5, L6, L7, L10, L8, and L9.
Steps for installing diode D4, including correct orientation.
Steps for installing varactor diodes D5 and D6.
Steps for installing capacitors C50, C51, C52, C16, C4, C8, C2, C21, C17, C18, C19, C22, C27, C47, C54, C49, C48, C46.
Steps for installing capacitors C45, C26, and C1.
Steps for installing capacitors C11 and C13.
Steps for installing capacitors C53, C23, C20, and C35.
Covers installing ICs U4, U5, U6, emphasizing ESD precautions.
Specific steps for installing integrated circuit U4.
Specific steps for installing integrated circuits U5 and U6.
Steps for installing transistors Q9 and Q8.
Steps for installing JFET transistors Q2 and Q3.
Instruction on folding capacitors for clearance.
Steps for installing trimmers CA, CB, and CC.
Steps for installing crystal X2, including ground lead.
Steps for installing filter crystals X3, X4, and X5.
Steps for installing the antenna jack J2.
Steps for installing the headphone jack J4.
Steps for installing connector jacks J8, J7, and J6.
Steps for installing potentiometers R2, R1, and R3.
Detailed instructions for winding and installing toroidal inductors L1 and L2.
Techniques for preparing toroid leads for soldering.
Steps for winding and installing toroidal inductor L1.
Instruction for installing the ATU jumper.
Lists specific resistance checks to be performed with a DMM.
Checks if relays K1 and K2 are switching correctly.
Tests audio output and sidetone generator functionality.
Adjusts the sidetone pitch parameter.
Tests display modes for signal strength and battery voltage.
Tests the keyer paddle functionality.
Advice on using a controlled signal for easier alignment.
Instructions for selecting and preparing a tool for trimmer adjustment.
Tests automatic gain control and S-meter functionality.
Measures current draw in receive mode.
Improves operating frequency display accuracy.
Steps for installing resistors for transmitter circuitry.
Steps for installing zener diode D7.
Steps for installing trimmer potentiometer R4.
Steps for installing capacitors C42, C34, C41, C43, and C44.
Steps for installing transistors Q1, Q5, and Q4.
Detailed instructions for winding and installing toroidal inductors L3 and T1.
Steps for installing toroidal inductor L3.
Steps for installing standoffs for attaching the top cover.
Instructions for preparing the top cover for assembly.
Steps for installing the thermal pad on the inside of the cover.
Steps for installing the red display filter.
Specific resistance checks for transistors Q4, Q5, and Q6.
Steps for fitting button caps onto switches.
Final step of fitting the circuit board assembly into the top cover.
Steps for securing the board to the cover with screws.
Re-aligning receiver filters after transmitter components are added.
Testing the keyer's audio output for clarity.
Tests transmit power output on the 20-meter band.
Tests transmit power output on the 40-meter band.
Tests keying stability and sound.
Explains operation of TUNE mode for transmit testing.
Ensuring all components fit within the case without interference.
Final step of closing the transceiver case.
Notes on leftover parts and next steps after assembly.
Details for connecting internal battery and external power supply.
Information on connecting and using external power sources.
Connecting audio output devices.
Advice on connecting antennas.
Connecting hand keys or paddles.
Explanation of front panel controls and the LED display.
Instructions for turning the KX1 on and off.
How to use the built-in lamp.
Details on display functions and brightness.
How to use the VFO knob for tuning and rate selection.
Explanation of RF Gain, Filter, and AF Gain controls.
Explains TAP/HOLD functions and switch combinations.
Lists key switch combinations for advanced features.
How to record and play CW messages using the internal keyer.
How to select between CW, LSB, and USB receive modes.
Notes on signal reception and sideband selection.
How to store and recall frequencies and modes in memory.
How to enable and configure audible CW feedback.
Compares LED display features with CW feedback features.
Procedure to compensate for BFO frequency differences.
Procedure to compensate for DDS frequency reference errors.
Description of the 30-meter band option.
Description of the optional plug-in keyer paddle.
Description of the optional automatic antenna tuner.
Explanation of the single-conversion superhet receiver design.
Explanation of the Direct Digital Synthesis VFO.
Explanation of the transmitter stages and power output.
Explanation of the low-power microcontroller's role.
Explanation of the ATU interface and information display.
List of various capacitor part numbers and specifications.
Continuation of the capacitor parts list.
Specific capacitor types and their part numbers.
List of trimmer capacitor part numbers.
List of diode part numbers.
List of LED display part numbers.
List of integrated circuit part numbers.
List of crystal part numbers.
List of encoder part numbers.
List of oscillator module part numbers.
List of potentiometer part numbers.
List of resistor part numbers.
List of resistor pack part numbers.
List of resistor pack part numbers.
List of slide switch part numbers.
List of momentary switch part numbers.
List of keycap part numbers.
List of integrated circuit part numbers.
List of crystal part numbers.
List of encoder part numbers.
List of oscillator module part numbers.
List of hardware items like washers and screws.
List of additional hardware items.
List of miscellaneous items like feet, wire, and sockets.
List of miscellaneous items: wrench, sandpaper, PCB, thermal pad.
Steps to remove the top cover from the KX1.
Steps to install the top cover onto the KX1.
General steps for diagnosing and resolving issues.
How to interpret and handle error messages displayed on the unit.
Specific troubleshooting for dead unit, LED, and battery issues.
Troubleshooting for voltages, switches, MCU, and relays.
Troubleshooting steps for VFO and DDS related problems.
Troubleshooting for audio, signal loss, AF amp, and AGC issues.
Troubleshooting for power output, current drain, and keyer issues.
How to change bands and set keyer speed.
Explains operation of TUNE mode for transmit testing.
Explains display modes for frequency, S-meter, and battery.
How to select receive modes: CW, LSB, USB.
Explains RIT function and clear operation.
Details tuning rate, lock/unlock, and high-priority memory functions.
Explains menu navigation and editing parameters.
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