I’m been working on a new direct conversion receiver build recently, with a focus on using discrete components as much as possible. In the past I have built a direct conversion receiver using an MC1496, using N6QW’s design, but I’ve been wanting to experiment with building my own double balanced mixers and diplexers. I’ve decided […]
I recently put together a PCB for a termination insensitive amplifier, based on the original article by Wes Hayward, W7ZOI, and Bob Kopski, K3NHI. The general idea is to provide an amplifier that has an input impedance (usually presenting a 50Ω impedance) which does not depend upon the output load, and an output impedance that […]
The ISS is running a Slow Scan Television experiment, scheduled to start Tue. Oct. 8 and run through Mon. Oct. 14. More details here. Below are some pictures I picked up with my Yaesu FT-65R handheld and Android phone running Robot36 – SSTV Image Decoder:
I’m currently finishing a 20w amplifier from EI9GQ’s book “Building a Transceiver” to pair with the “Simple SSB” 40 meter transceiver I recently completed. The amplifier was mostly complete but I still needed a low pass filter for it. I had a look at the filter design suggested in Eamon’s book, but I didn’t have […]