KO7M - Ham Radio Blog

I have put up a QRSS grabber in Redmond, WA for those QRSS fans out there that would like to see how they are doing getting into this part o...

Well, I am going to set this aside for a little while and do other things as I am a bit tired of the project.  I calculated a perigee pass f...

Good progress today.  I am actually down to the place where I am debugging the SGP4 implementation.  I have initially hardwired the observer...

Work continues to build a SGP4 object implementation on propeller.  Getting the mathematical expressions correct is at best painful.  I have...

Well, I have gone to multiple propellers.  Good thing I have a multi-engine rating .  I have been working on implementing satellite tracki...

With the success I had with my first propeller receiver I decided to put together a little single conversion superhetrodyne receiver kit fr...

Today I played around with my new floating point coprocessor.  I decided to build a bit of code that would parse a two line Keplerian Elemen...

Today I am playing with a magic little I2C coprocessor from Micromega, the uM-FPU V3.1  32 bit IEEE 754 floating point and 32 bit integer co...

I want to see how raising the chip temperature to about 50 degrees C will affect frequency stability of the propeller chip.  I decided that ...

I decided to measure the propeller RF oscillator accuracy tonight.  I find that my random sample of one Propeller Board to be accurate to 1 ...