JasonKits
PCB Kits
H.F SPECTRUM Analyser PCB KITSpecan is a low-cost, homebrew spectrum analyzer designed by VU2ESE, based on the classic W7ZOI/K7TAU design. Built around an Arduino, Si570 oscillator, and AD8307 log detector, it covers DC to 70 MHz and delivers high-performance RF measurement capabilities for amateur radio builders. It offers dual resolution bandwidths, PC plotting, and built-in display, making it a powerful DIY alternative to expensive commercial spectrum analyzers.
Modification Kits
K5 -SI4732 MODQuansheng k5-uv AM - SW -FM Mod - allows you to convert the handheld to an AM - SW - FM receiver -
ANTENNA KITS
Mini Whip AntennaWhat is it? The original PA0RDT Mini Whip is a very simple yet highly effective active receive antenna for the VLF, longwave (LW), medium wave (MW), and shortwave (SW) range. It consists of a small metal plate and a buffer amplifier. How it works: The amplifier features: Very high input impedance implemented using a JFET as a source follower, which senses the voltage between the small metal plate and ground Low output impedance implemented using an NPN transistor as an emitter follower, designed to drive 50 ohm coaxial cable This design allows the antenna to perform exceptionally well even in electrically noisy environments or locations where space is limited. Specifications: Parameter Value Application Radio reception only (not for transmitting) Frequency range 10 kHz 30 MHz (covers VLF, LW, MW, SW) Power DC 5 13 V, 100 mA RF connector SMA Feed line 50 ohm coaxial cable PCB material FR-4 PCB thickness 1.6 mm PCB copper weight 1 oz What makes it special? Extremely compact.
Keyers
Morse Iambic Keyer -Practice Keyer & Morse DecoderThis standalone Morse code keyer and decoder, proudly shared by Scott Baker (all credit to him), offers a compact all-in-one solution for CW operators. It sends Morse code using an external keyer or triggers a transceiver when sending stored messages. The built-in decoder reads paddle input and displays decoded text on the OLED screen. Edit and store custom messages directly to internal EEPROM.
Test Equipment
Opto Isolator TesterOpto Isolator tester for 4 pin and 6 pin devices
Test Equipment
Precision AVR Inductance/Capacitance MeterL/C/CE Meter Precision Inductance, Capacitance, and Electrolytic Capacitor Meter Measure L, C, and CE electrolytic capacitors with high accuracy. The L/C/CE Meter is a versatile, open-source handheld instrument designed for measuring inductance (L), capacitance (C), and electrolytic capacitors up to 10,000 µF with exceptional precision. Perfect for electronics hobbyists, repair technicians, and engineers. Why choose this meter? Unlike cheap multimeters with limited capacitor range, this dedicated L/C/CE meter covers everything from tiny 1 pF ceramic caps to large 10,000 µF electrolytic and tantalum capacitors. It also measures inductors from 0.1 µH to 1 H, making it an indispensable tool for any electronics workbench. Key Features: Wide Measurement Ranges Inductance (L): 0.1 µH 1 H Capacitance (C): 1 pF 10,000 µF (includes electrolytic and tantalum capacitors) High Accuracy & Smart Features Calibration menu for precise readings Compensation menu for lead and parasitic cancellation T...
PCB Kits
Solid state Transistor VHF Radio Rx Air Band P.C.BWhat is it? This VHF transistor radio is based on the popular TA7358 front-end FM amplifier/oscillator IC, which supplies an intermediate frequency of 10.7 MHz. The IF is then processed with discrete transistors, making it very easy to demodulate amplitude modulation (AM) for the Air Band (118 136 MHz). Tuning & Controls: The radio uses two varicap diodes for frequency control, adjusted by two variable resistors: Tune main tuning across the band Fine Tune precise adjustment to zero in on weak or drifting signals Additional controls include: Squelch Control silences background noise; audio amp activates only when a transmission is received Volume Control adjusts output level Oscillator Tap Connector: A dedicated connector allows you to tap into the oscillator signal and connect an external frequency counter, which then acts as a digital frequency display for the radio a great upgrade for serious aviation listeners. Why did I make it? All credit goes to Rob, who contributed to drawing...
TRANSMITTERS
WSPR BEACON V2WSPR Beacon V2 HF transmitter based on ATmega328 and Si5351 with 3 BS170 output stage delivering up to 5W on 20m. Includes full menu system for configuration. Ideal for WSPR propagation studies and HF beacon operation.
