I built the bitx 20 linear(PA) last week end. My first build of the PA was done on the bitx transceiver board itself. It done in dead bug style. When i switched on the power the PA oscillated. I read several posts on the mailing list and tried some adjustments. Still it was oscillating. Finally, i decides to shift the PA to a separate board and shield it.
The following pictures show how i did wire up th PA.
Chips of PCB fixed to a 3’x3.5′ board. The board is divided into two compartments with a piece of aluminum which also serves as heat sink for IRF 510.
The IRF 510 wired. Since the heat sink is grounded, the drain of the IRF 510 MOSFET was shielded using a mica washer.
The wiring is almost complete.
The PA attached to my bitx board. The oscillation have stopped now. But the power output seems to be low. I am waiting for the next weekend :D)
I was teaching computers to music college teachers for the past 3 days in connection with a training program organized at academic staff college,University of Kerala. Here are some snaps of the program.
The course was organized to improve awareness of music college faculty about the opportunities offered by new generation technologies. There were classes on recording techniques ,Sound engineering Internet
technologies etc. Beside myself Sri.Pradip Somasundaran and Dr. Achchut Shankar took classes. The course was coordinated by Dr. Madhu Vasudevan from Maharaja’s College Ernakulam. It was a very enjoyable experience for me and my interest in music has been rekindled by the event.
Freedomwalk is a novel initiative for popularizing Free Software in Kerala. The freedom walkers reached our college yesterday. We organized a small function welcoming the walkers. Here are some snaps of the function.
VU2CLU is a ham radio station set up at the Kerala State science and technology Museum. The main purpose is to popularize ham radio among general public. The station has several commercial and home brewed equipments for demonstration.
The official inauguration of the station was done by Honorable Minister of education Government of Kerala on 29th October 2008. Around 30 hams participated in the event.
VU2CLU
VU2ITI operating and VU2MHM Looking on.
Another view of the station
Main building of Kerala State Science and Technology Museum
Sri. M A Baby Honorable Minister inaugurating VU2CLU
Sri M A Baby inspecting the station
VU2ITI and VU2SWX explaining the operation
VU2ITI and VU2SWX explaining the operation
VU2ITI and VU2SWX explaining the operation
Minister looking at the exhibits