Dual-Band RW4HFN Antenna for 145/430 MHz bands

Dual-Band RW4HFN Antenna for 145/430 MHz bands: This design is a highly practical dual-band RW4HFN antenna that allows amateur radio operators to transmit and receive on both the 2-meter (145 MHz) and 70-centimeter (430 MHz) bands using one compact assembly. This design functions as a center-fed element on the lower band and exhibits multi-mode characteristics on the higher band, providing excellent versatility for fixed or portable operation. It is intended to be fed with a 50 Ohm Coaxial Cable.

Building an FT8 Digital Interface – Dive into Digital Modes

Building an FT8 Digital Interface – Dive into Digital Modes: This blog post examines a well-designed FT8 digital interface circuit that provides both audio coupling and PTT (Push-to-Talk) control.

Ribless Programming cable for Motorola GM360/GM338 radio

Ribless Programming cable for Motorola GM360/GM338 radio: Programming cable for Motorola GM360 is intended to use with the usb port for motorola GM360 radio and other motorola radios like GM300/GM338/GM300/GM380/GM640.

SSM2167 Microphone Preamplifier with compression for ubitx HF Transceiver

SSM2167 Microphone Preamplifier with compression for ubitx HF Transceiver: The SSM2167 is a low-noise audio amplifier with compression and noise gating features. It can be used in the uBitx HF tcvr to improve audio quality of signal