50MHz 10mW handy transceiver

During a 50MHz SSB-QSO, my friend JE3TXU/1 (Mr. Haraguchi) mentioned that he had created a very compact 50MHz transceiver. I suggested that he should share this information in the Japanese CQ magazine. Additional details can be found in a related book. The transceiver is constructed using surface mount technology, with all transistors and resistors implemented as surface mount chips, contributing to its small size. However, as observed in the accompanying photo, numerous wires are visible running along the surface of the printed circuit board. My younger brother remarked that it resembles noodles (RA-MEN). Consequently, I decided against showcasing it at the ham fair handmade booth.

The 50MHz transceiver designed by Mr. Haraguchi exemplifies modern compact electronic design principles, utilizing surface mount technology (SMT) for its components. SMT allows for a reduced footprint, making the device significantly smaller than traditional through-hole designs. The choice of surface mount transistors and resistors not only minimizes space but also enhances performance due to shorter electrical paths, which can reduce inductance and improve high-frequency operation.

In the provided photo, the visible wiring on the printed circuit board (PCB) indicates a complex interconnection scheme necessary for the transceiver's functionality. While the aesthetic may evoke comparisons to noodles, this wiring layout is essential for maintaining signal integrity and ensuring reliable connections between components. Such a design may also suggest a prototype phase where the final layout is not yet optimized for production.

The decision not to present the transceiver at the ham fair handmade booth may stem from concerns about the visual complexity of the wiring or the desire to refine the design further before public display. The transceiver's innovative approach and compactness, however, highlight significant advancements in amateur radio technology, paving the way for more portable and efficient communication devices.One day on the 50MHz SSB-QSO, my friends JE3TXU/1 (Mr. Haraguchi) sad to me that he made 50MHz very small transceiver. I said to him that he shall inform about it on the Japanease CQ magazine. You can see about it on the book. See the photo! This rig is made by a surface mount construction. All transistor and resistor is made by surface mount chips. So this is very small. But as you can see on the photo, many wires run on the surface of the print board. My younger brother said to me that it looks like noodle(RA-MEN). So I gave up to show it on the ham fair handmade booth. 🔗 External reference