I have decided to give up the quest for the holy grail of imaging visual objects.
It’s a long story, but basically I saw a setup that gave coffee table images within minutes of arriving at a semi dark site. It’s just a commodity now, just buy the pieces and you are an imager.
So, I decided to go into radio astronomy. I’ve been intrigued by it for years, and my background is in radio communications. My last job was working with electronics in the 4 giga hertz range, so it’s a familiar topic.
I recently came across a thread on Cloudy Nights about a receiver called an RTL-SDR.
Not sure what the RTL stands for, but SDR is for Software Defined Radio.
Basically it’s a $25 device that plugs into the USB port on your PC.
Then, running SPR# software, you program it to receive the frequencies you want.
The radio can be tuned to received any frequency from 24Mhz to 1.7Ghz and multiple modes of modulation.
I’m interested in the Hydrogen line which is at 1.42 Ghz so this fits right into my plans.
So, you need:
This is my amplifier chain and filter.