VK5TM


News, Updates and Other Minutiae

I have, for quite a while, provided modified versions of the code for my projects free of charge. However, the cost of webhosting for this site has tripled in the last couple of years and the little I make out of the pcbs I sell goes nowhere near covering this cost.

As of October 2017, I will be asking for a donation in exchange for providing custom modified code for my projects to help keep this site available.

November 2017

A modification plus software to allow the Simple DDS VFO to be re-calibrated as often as you want without having to re-program the PIC has been added to the Simple DDS VFO page. Simple DDS VFO bug problem fixed. Code uploaded to webpage as version 'c'.

October 2017

There is a bug in the Simple DDS VFO code. See Simple DDS VFO page for the problem and updated code. Included an add-on for the Simple VFO project to indicate which step size has been selected. Simple DDS VFO project updated and software file uploaded. The pushbutton on the encoder is used to change step size (step sizes 10Hz, 1kHz and 10kHz).

September 2017

Noise Canceller kits now available.

July 2017

Updated both the DDS Xtal Substitute and DDS Xtal Substitute Mark 2 projects into one project. The original webpages are available to download as PDF's.

May 2017

New project added - my version of the X-Phase noise canceller. PCB available and a kit of parts to follow soon

FT757 Battery Replacement

Replacing the battery in an FT757 in pictures

While hunting around the internet, I came across a document in French by Denis F4ANN about replacing the battery in an FT757 rig. Yaesu FT757 pic While maybe not homebrew strictly speaking, we are taking something apart, doing some soldering and putting it back together again (OK, technically it is 'repair work'). As I have an FT757 sitting on the shelf awaiting it's turn on the bench, I decided to translate it into English and put it into the 'information depository' for later. I also asked Denis's permission to put it on my website, which he agreed to. Rather than write it up as a web page, it is available to download as a pdf below. I figure others may want to store a copy locally rather than having to keep refering to a website they may forget where they saw it. One thing Denis did, was to replace the original battery:- Original FT757 battery with this type:- Replacement battery He also moved it to a more convenient location, should it ever need replacing again. This information may also be useful to anybody disassembling an FT757 for other repairs. Download the PDF file here: FT757 Battery Replacement