Author Archives: vk3yy

PD Powerbank for SOTA Radios

This post describes how the newish Power Delivery (PD) mode mobile powerbanks can be used to power a SOTA transceiver as well as keeping your other hiking devices charged. The PD protocol enables fast charging of mobile devices from a … Continue reading

Posted in Hiking, Projects, radio communications, SOTA | Tagged , , , | 2 Comments

3D Printed Accessories for the FT-817

A few radio accessories printed out recently for the ‘817 transceiver (from Thingyverse, see links): DC plug adaptor using an XT60 connector.  I have been using these connectors for a while now, they are small and capable of a lot … Continue reading

Posted in Projects, radio communications, SOTA | Tagged | 6 Comments

USX or uSDX QRP HF Transceiver

This build is based on the interesting design by Guido, PE1NNZ.  The transceiver originally used the very successful QCX as an initial platform, but it now has it’s own life and there are several scratch builds using dedicated PCBs on … Continue reading

Posted in Projects, radio communications, SOTA | Tagged , , | 6 Comments

Jpole for 70cm

While experimenting with LoRa, I needed a better antenna at home for range testing the LoRa tracker.  I came across this Jpole antenna calculator and used it as a starting point for dimensions. As we are presently locked down and … Continue reading

Posted in Uncategorized | 7 Comments

Archer Lookout VK3/VC-038

One of the newer Victorian summits added to the register late in 2019 was Archer Lookout, VK3/VC-038.  Ron, VK3AFW was the first to activate it and after some discussions on access, I planned an activation on an ebike. Archer Lookout … Continue reading

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

LoRa GPS Tracker

LoRa is a newish Internet Of Things communications technology.  It promises long range (LoRa), transmits a small amount of power and is designed for sensors that may need to operate from batteries for very long periods of time.  The air … Continue reading

Posted in Projects, radio communications | Tagged , , , , | 12 Comments

NanoVNA and EFHW

The NanoVNA arrived the other week, these units are very good value and work remarkably well.  With small size and weight (63 grams)including battery, it can easily be taken out in the field, providing it is protected from the elements.  … Continue reading

Posted in Uncategorized | 5 Comments

20 metre SSB Compact Transceiver

This one follows the design of the DK7IH Cigarette Packet Micro Transceiver.  The changes made to the original design are: – Plug in front end, transmit driver and PA low pass filters – FET power amplifier (IRF510) rather than bipolar … Continue reading

Posted in Uncategorized | 7 Comments

New Case for the QRPLabs QCX CW Transceiver

The QCX transceiver was previously packaged in a standard plastic enclosure from Altronics.  The fit was good and the extra space allowed for a battery pack but metal is a better choice for RF. I was not satisfied with the … Continue reading

Posted in radio communications, SOTA | Tagged , , , , , | 2 Comments

Three Summits around Falls Creek

With nice weather forecast and a day off on Monday, it was an ideal opportunity to do a couple of new summits in the Falls Creek area.  I left home in Melbourne’s South East at 7am on Sunday and took … Continue reading

Posted in Hiking, SOTA | Tagged , , | 2 Comments