Tuesday, April 4, 2017


Here some photos of INDSP installed in the FT817.
Works Great !!!
Check my website for more info

Thursday, February 16, 2017

Friday, August 26, 2016

New website for Noise Canceling

Please visit the dedicated web site for my new DSP 


You'll find news, manual, video and more.
Stay tuned :)

Friday, April 1, 2016

Active Noise canceling

Finally in beta testing my new project.
It's a DSP performing an adaptive subtraction of the noise.

Check the dedicated website http://jackdev23.wixsite.com/iw2ndh-dsp


Friday, April 3, 2015

Boxing ARDF

Thanks to John N8JI
here some new pictures and tests:
"I did testing over several days on UHF. The kit works as excellent on UHF as it did on VHF. I love it. I'm going to add an external speaker so I can monitor the audio. I've found with other DF kits that listening to the audio can help in determining if a bearing is a reflection (garbled sounding tone) or a true bearing (clearer sounding tone).

I've attached a bunch of pictures of the assembled kit. The antenna switching board is mounted inside an old 900 MHz Polyphaser housing I had kicking around. It had female n-type connectors on both ends. I kept the n-type connector on one end as my receiver connection. On the other end, I punched out the hole where another n connector had been and installed a DB9 connector for the antenna control lines. I used BNC connectors for the antennas. The circuit board is mounted as close to the connectors as I could get it. There are short jumper wires between the circuit board and the connectors (just a few millimeters long). I was going to open it up and take a picture or two of the inside, but then I remembered how delicately those wires were soldered to the circuit paths (from when I accidentally popped the solder pads off the board!). So, I opted to just leave it be and not take the risk of one of those wires coming loose.
On the control box, the display window was a bugger to cut out. I lack the proper tools to cut out rectangular holes. That will be remedied soon with the addition of a few new tools! (Please don't tell my wife!) I chose to use an RCA connector for the receiver audio input, just to make it simple to tell the difference between the sound card audio output.
So, there it is. I hope you enjoy the visual tour of the project. Any and all comments, feedback, suggestion and such are welcomed! I've already got a few ideas for building the next one, so as soon as I get caught up on some other projects, I'll be buying another one.
Thanks and 73,
John N8JI"
Very nice work, I LIKE IT !