Here I have enclosed the new unit in a solid metal case with some foam insulation around the inside. This should help control some of the noise and temp drift I have been having with previous test oscillators... I'm still having parts problem. However, my projects benefactor has just ordered me some variable caps, toroidal transformers and JFET's  ( Read more... )

 Ok, so basically the last design setup sucked big time.  Power hungry and provided very little output for that power consumed.

I did a complete redesign of the oscillator circuit to run 10-20mW with low voltage <4.5volts and low current drain of less then 200mA and all going into 50ohms or close to 50ohms as we can get everything.

Here is what we ( Read more... )

Well since the last post I have added a few things to the 30 meter MEPT project.

1. I have now added the uC (Microcontroller) a PIC12F675 only because I had one on hand and it was close. I have also added an RF amplifier! Mostly a waste I went from 10uW to a max of 50mW.  Now this all sounds great except the design was not intended to have an RF ( Read more... )

 I had so much fun building that first one and even with the nasty build I did on the RF osc. section it performed quite well.  Here are a few shots from the new version (Version 2.0) of the 30 meter QRSS MEPT.

I bought this tin just for this purpose back during the holidays... is that sad or what.
The short antenna gives the unit a load and is  ( Read more... )