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.
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'.
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).
Noise Canceller kits now available.
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.
New project added - my version of the X-Phase noise canceller. PCB available and a kit of parts to follow soon
A long time ago, I was doing a job for a customer who was about to move house. In a pile of stuff destined for the rubbish were some very old QSL cards, which I was told I could have if I wanted them. Below are some low resolution scans of some, along with a hand wriiten letter (remember those?), that date from 1913 to 1925. I have about 90 of them, most dating around the same period. I will post some more as time (and inclination) permits. Most are in reasonable condition, but at least one is in very poor condition. Note the schematic drawing on the back of the letter.