These are a few of the projects that I have started and not finished yet. I think I list them in priority order below.
A step attenuator
The first project is a step attenuator. I use 1206 resistors. I have measured the SWR through it (without any attenuation on) and see a rising SWR and at 30 MHz it is 1:13. Quite high? Any readers could give a comment on what could be wrong. Is it just the switches and the zigzag between them that changes the impedance?
I use a box that used to have Mackerel fillet in tomato sauce in it.. :-)
|Step attenuator progress|
HF Test set
This is a kit that I bought a while ago. It is from the 4 State QRP Group. It will become Frequency Counter, Crystal Oscillator, Wideband Noise Generator, Audio Oscillator, 50 Ohm Dummy Load, RF Probe and Time Domain Reflectometer. I started to build and finished about up to 50% of it and then got diverted into other projects. A got a nice enclosure and a back lit LCD here to be used for the project.
|NB6M HF Test Set (not built by me)|
|AVR with LCD for the AD8307 Watt meter|
This project is also finished to about half. The AVR is soldered to the board and LCD is tested as seen in the picture. I was happy that the first time ever I soldered a TQFP32 was success!
I have also done the input part and measured it with the VNA. Next step is the AD8307 IC. I am following the guide here:
10m CW beacon
I got the PCB for the Genesis Radio Q5 transmitter some year ago. What I did not have was the final transistor but I received one of those last month. My idea is to build a beacon for the 10m band. I have built and tested the oscillator. The PA stage is built as can seen on the image, but not tested yet. To be built is the LPF and the beacon keyer. I think I will use an attiny45 together with the code from YACK
I could probably run it on my balcony if I come up with an antenna. Might be a loop.
|Genesis Radio Q5 CW transmitter|
30m QRSS beacon
|QRSS transmitter for 30m|
I bought the kit quite a while ago and started the build. Then I thought it would be more fun to build simpler things and not necessarily kit. As the build instuctions did not include any testing along the way, everything just felt like a soldering practice. But I have to finish it. Might be good to have a goal set for summer 2012 so I can run it portable.