​Amateur Radiostation PA3DWC

The story of the restauration of my DY-88 after the Dynamotor caught fire due to an old and crumbly high voltage cable ..... see the...

This Page is about the progress of Building my Lima SDR. It is being build in several stages. The stages consist of building up, and...

With just a cheap RTL DVB-T dongle (round $15) it is possible to receive aircraft around your location up to 500 miles. The setup is...

This design is from Hans - PE1RNU I used a FT 240-43 for much more power, not needed but beter safe than sorry. 150 Watt continious, 300...

This is the design I used for both of my two End Fed Antennas. Instead of the FT 140-43, I used a FT 240-43 for much more power, not...

This page is dedicated to the modification of the Racal/Cougar radio PRM 4515L (70 Mhz). All information and pictures were copied from;...

After several fruitless attempts to make an active loop work in a city environment, it was found that the electric field from local noise...

Beneath you will find my Home Made 2 meter Transceiver with an output of 1 Watt. The heart of the transceiver is a DRA818V who is being...

WSPR (pronounced "whisper") stands for "Weak Signal Propagation Reporter". It is a computer program used for weak-signal radio...

The Fox Delta SWR Analyzer AAZ-0912A is designed to accommodate AD9850, SMT 125MHZ OSC and SMT SO8 AD8307. This mod made possible prepare...

This expirement was done to try to lower the noise floor on HF.  On my Endfed the Noise floor is S9+.​ Both tuning capacitors come from...