[amsat-bb] FM vs Linear Transponders

[Zach Metzinger]

On 05/08/20 13:39, Stephen DeVience via AMSAT-BB wrote:
> I like SDRs too, but then you probably need at least a laptop to get enough
> computing power to do a good job.

This is a bit of a misconception. Single-board computers (SBCs) have now 
become ridiculously fast:

"The Raspberry Pi 2 Model B is approximately equivalent to an Athlon 
Thunderbird running at 1.1GHz; again, it has the much higher-quality 
graphics, which come from using the same GPU as previous models. The 
Raspberry Pi 3 Model B is around twice as fast as the Raspberry Pi 2 
Model B, depending on the benchmarks chosen."

(from https://www.raspberrypi.org/documentation/faqs/#pi-performance)

The Pi 4 is super fast, but also needs a heatsink...

A display can be had here:

https://www.sparkfun.com/products/14776

Here's a demo of someone putting it all together:

https://gqrx.dk/blog/pi-sdr-raspberry-pi-3-7-touchscreen-rtl-sdr-gqrx

Here's where we need a volunteer to put this onto a SD card for easy use 
by those not familiar with Linux, etc.

My plate is full, but I'd be glad to test it out and give feedback.

--- Zach
N0ZGO

(P.S.: ".. only thorough the sorrows of men .." -- some really heavy 
stuff right there.)