More building kits and home brew


I finally got going on another pixie, this time on 20m. It needs the experimental touch but for now I was happy having the two frequencies on a switch adding In capacitance to shift by about 4kHz. 
In an unusual twist for me I even made some effort to make it neat and tidy by putting it in a box I had laying around, it had enough room for internal batteries too. 


I was tempted to build in a VXO but with a youkits HB1B due here in the morning I might save the efforts and stick with two frequencies for the fun and simplicity of it. 

By the time I finished the build the band had started to close and certainly wasn't up to much on low power levels obtained from a 9v battery. Tomorrow I will give it a whirl and see where I'm spotted on the RBN and hopefully have some calls reyurned. 

73 for now M0TEF

Comments

Post a Comment

Popular posts from this blog

Time out for life adventures

Image
Where have I been? I have had a busy old time pushing forward with a few projects and enjoying the pleasures of family life with my wonderful girls. I have taken a bit of time out to focus on some really important things to me. I am back though, I feel I have a bit of time to dedicate to my hobbies and sharing some of my projects with my readers. This last 18 months or so have seen my build my teaching profile and adding to my commercial photography clients, I have started on a Master program exploring educational research and developing my career that way. The good news is though that my hobby has been there to allow me to escape and relax when needed, I often find that the hobby of radio offers us an escape from normal everyday life in many ways. Sometimes the ability to go and sit and listen to some CW with the headphones on and hide away from family noise for an hour is always welcomed. I am enjoying my Begali key and trying to work some rare DX when time allows and I am lo...
Read more

Modifying the FT-897 to get the best from it.

Image
I have been using my ft-897 for a while now, the main rig has a fault and I have been far too busy to get it sorted and repaired. I found it was not quite right, I have been spoiled by using quality receivers over the last few years and I couldn't quite put my finger on what was missing. Some reading online and some tests quickly helped me identify what it was, the AGC was a little too fast and the audio amplifier adds a certain hiss and noise to a signal. I found two fixes online, the first one was to add a capacitor in parallel to modify the AGC hang time adding it to C1503 - mod to be found on DG2IAQ modification sheet, a great source of information for any 897 owner. found here. http://www.ok1kng.netcontrol.cz/rs/download.php?soubor=25 The other fix was to reduce white noise, the info can be found here. http://ok1fig.nagano.cz/FT897D/FT-897D_LessWhiteNoise.htm By adding two capacitors to make up the 0.75uF and a resistor of 68 Ohm between pins 2 and 4 on the IC the TDA200...
Read more

Improving the FT-1000mp Mark V RX

Image
I have been on a mission to make the most of the equipment in my shack, I didn't want to get sucked into buying more radios or very expensive new models to chase a very small improvement. I decided the next best thing was to squeeze every improvement I could out of my existing equipment. I have been really pleased with the RX on the FT-1000MP Mark V and wanted to get all of the filters loaded into it. It has taken me some time but I have finally tracked down the full set of Yaesu filters to install in the radio and improve the way the RX performs when using narrow filters. I have already done the NB mod that is documented earlier on my blog. I have now managed to add the 2.0kHz SSB 500Hz and 250Hz in both the 8.2MHz IF and the 455Kz IF. I can assure you that having two 250Hz filters inline can really help improve the signal to noise for CW and for RTTY/Digital modes. The 2.0kHz filters in line really help with SSB but it does make the signal less pleasing to the ear and require...
Read more