Anything here it is either my own work or includes a significant contribution from me.

Anything here can be used freely but please do acknowledge the source!

Having problems accessing or using repeaters on 2m? This article may help.

Do you want to try your hand at Radio Direction Finding (RDF) or 'Foxhunting' ? Then try this easy to build  & repeatable antenna design.

A design for a simple and repeatable 4m antenna.

How to  modify a Kenwood TH215 to operate on 12.5KHz spacing. In particular the key piece of information missing from all the other articles I found on the Web !

Some claim that larger diameter “choke baluns” are less effective than their smaller diameter counterparts, even when the turns count is reduced to maintain equal inductances in both designs.  It has been claimed this is due to “stray capacitance” in the larger diameter coils.

This analysis casts doubt on that claim by asking “ Where is the stray capacitance formed?”