Author Archives: vk3yy

Diamond RHM8B Antenna Strain Relief

I came across this interesting part at the Tokyo Radio Fair last month. It is a BNC strain relief for the popular Diamond RHM8B antenna, particularly when used with a PL259 socket adaptor on an FT-817.  If anyone has one … Continue reading

Posted in radio communications, SOTA | 2 Comments

Lightweight 2m Yagi for SOTA

With HF conditions poor at the moment,  2 metres with a bit of antenna gain is a good backup or main setup for SOTA. I wanted to make this antenna very lightweight and easy to carry in the pack without … Continue reading

Posted in Projects, radio communications, SOTA | Tagged | 9 Comments

MFSK16 APRS Tracker

Over the past couple of weeks I have been running this  MFSK16 APRS HF tracker in the car as a breadboard on 40m. I tossed up on whether to make a leaded or surface mount PCB, but ended up with … Continue reading

Posted in Projects, radio communications, SOTA | Tagged , , | 3 Comments

Weak Signal Mode APRS

Over the past few weeks I’ve been experimenting with APRS Messenger, a great PC based application that uses weak signal modes for Automatic Packet Reporting System (APRS). Traditional HF APRS uses 300 baud packet data for APRS messaging which isn’t … Continue reading

Posted in Hiking, Projects, radio communications | Tagged , , , , | 3 Comments

Yaesu VX8-DR GPS Revisited

A while back I made a GPS receiver module add on for the VX8-DR so that it could be used for APRS while on SOTA hikes. The module worked well although it was not that practical for portable operation because … Continue reading

Posted in Projects, radio communications, SOTA | Tagged , | 1 Comment

Sheet Metal Bender

This metal bender project arose out of the need to often make small enclosures for various radio related projects.  Some time back, I purchased one from Ebay but it was not very good and would flex while bending even thin … Continue reading

Posted in Projects, radio communications | Tagged | 6 Comments

QCX QRP Portable Transceiver Build

This compact “QRP” or low power radio kit from QRP Labs in UK was too good to resist.  At $49.00 USD, it packs a lot of functionality into a small package.  The radio is based around an IQ phasing receiver … Continue reading

Posted in Projects, radio communications, SOTA | Tagged , , | 9 Comments