Sound card interface by cheap USB sound card.

Sound card interface is a equipment for communication. Any mode using a computer for encode or decode data should be interface for control transceiver. I brought a cheap USB sound card at computer store. Then come to my workbench to making its.

A circuit is simple. Audio output from USB sound card direct to port for connect to mic of transceiver. At a same time audio signal going to control NPN transistor. A transistor I use 2n3904 for switch or control PTT port for transceiver.

I can find many circuit on internet. VOX control is use for this sound card interface.

Referance ;  The USBlink - a home-brew digital modes interface http://www.g4ilo.com/usblink.html

Day two with Andriod

2nd day for try a using andriod. After I using glSDR, I thinking why any hhavve information for use RTLSDR with andriod. Andriod is a compact hardwere and some softwere.

If I can used RtlSDR with tablate I think is vary compact for portable station. Many ham like my  idea.

Sdr on Android tablet

I have a android tablet for test in 2 or 3 days. Now I have a first time for using android. A testing today I added a SDR application into tablet. Application is glSDR.
In the app have a many share server  You can select once for listening from him/her location. About all station share in HF band. If you haven't a amateur licence you can try to listens on this.

RAST Meeting

Last weekend at N-siri resort. This place has near Bangkok. I was gone to met with many ham radio in Thailand.

This is meeting for RAST. A monthly meeting for expand jobs, news, event and other about ham radio.

So I found foreigners hamr stay in Thailand coming to met. I saw Japanese, American and European hamr came to meet and ate lunch.

So this day some Thai hamr gone to Vietnam for meeting in IARU –R3 conference.

Next weekend has Thai exam at Patumtani province. I can’t go to its.

See more picture

https://www.facebook.com/media/set/?set=a.540255572655825.141588.532690413412341&type=1

update Nov 23, 2012 ;Added youtube video.