3 axis CNC for milling PCB - Part 1

Draft the Rubber Woods for making CNC Machine. This will be using 14 parts for assemble. Rubber woods found in local store. This design can working area in 200x250 mm. Enough for milling PCB.

Now! We will order the woods. Estimate cost for woods is ฿800.

SDR received JT65 on 20m

Sunday I test my homebrew SDR. I get information from YU2LM's Website. Select design single LO Frequency at 140625 kHz generate from Crystal Oscillator. JT65 operating in 140760kHz. This is on range of my SDR. While operate with long wire antenna. I received first QSO between BV7RJ and JA1PLT and signal at -24db. So I think very weak but it good for experiment. It first time.

DDS with AD9850 and Basic Stamp microcontroller..(part 1)

I and my friend in group "Thailand Amateur Radio Group" will dicuss at RAST meeting in May. We talk about make DDS project. After we buy a DDS AD9850 module. We go back to a workbeanch for starting our jobs. Somebody used RasberryPi foe control, somebody use adurino and I select Basic Stamp. This for start to re-learning a basic language again (I lean at grade 1 in High school). So shall be lean step by step.

The Basic Stamp 2p24 has feature for I2C communicate to module ,16 I/O ports for connect Encoder, Buzzer etc. and include feature for LCD command.

Now I can write a program for up and down a data and output to screen. Next step make a program for control DDS.

New 20m Invert V Antenna test in 5Watts WSPR

Last week I made my antenna for 14 Mhz band. I gone to Japan in March and brought the Balun BU-50 back to Thailand. When I were making antenna by cut a wire 1 mm dia and ½ wavelength.

Propose for this antenna for using in portable station. I test in WSPR mode at 5 watts because I’m busy, I can’t monitors in 24 hrs. After open the wspr.org to check a result.

My station and new antenna can spots over 700 station. That is good result for new antenna. Next I will try in portable station and other mode.