Category: Amateur Radio (Ham Radio)

The amateur radio satellites which I have operated so far have uplink and downlink in the VHF and UHF bands. Some of my friends also operate on the Qatar

Alpha, beta and gamma in case of transistors indicate the current gain in different configuration. Alpha is the current gain in common base configuration. It is the ratio

TSOP1738 Infrared Receiver is in an integrated chip with three terminals outside, one for ground, another for power supply and the third for signal output. It works on

There was a pass of International Space Station with about 37 degree maximum elevation in my region. I did not expect anyone as it is a noon pass

Yesterday, when I read about NPN transistor BC547B and the corresponding PNP transistor BC557B, I noted that the former had a typical transition frequency (fT) of 300 MHz

Bipolar junction transistors were the ones we started using long back for our hobby electronics projects. In those days we had PNP type of germanium transistors and NPN

I was quite happy to read the email from Félix EA4GQS, AMSAT EA, on the AMSAT bulletin board just now. He has mentioned that new HADES-R and HADES-ICM

Secure Argentinian Amsat Satellite Pass Prediction Page informed by Pedro  LU7ABF is: https://mail.amsat.org.ar/pass.htm

In the remote past I have had several instances of antennas coming down in the rainy season, which is also the windy season. Though the first part of