So, day7 in the H1N1 swine flue s***… just starting to gain consciousness
Got my way to expensive Mouser order today – happy that the FedEx charge was 0.00 usd… so they just smeared that on the rest of the components. Only reason I used Mouser was the selection of 1000v silver-dipped-mica capacitors, they seem to carry the best stock of these very expensive components.
So, now I have the following:
- Amidon toroids + some nice high quality wire
- PIC + LCD + some thermistors.
- Filter capacitors
- PSU filter/ripple capacitors
- power transistors for the regulator
- EB104 “kit” – now built – will blog specially about that
- Copper spreader – Old friend works at workshop that produces switches and other high power stuff for the local power companies, they have ton’s of VERY nice copper stuff, was very happy to remeber this old friend.
here is a gallery link:
As you can see I have started construction of the chassis. As I don’t have any good “sheet” bending machines I opted to build the chassis from 10mmX10mm aluminum square axles.. don’t have the English word here 
I tried using some aluminum “brazing” tech called durafix. My impression was this was like these products on TV market, look good but are really shitty…. and unfortunately the latter was true, so I ended up going to a shop with a TIG AC machine to point-weld this.
Now my brother, who happens to be the secretary of the Icelandic Radio Amateurs has asked me to give a short lecture on this amplifier business next Thursday, so that forces me to put something down on paper, and design this properly. So some Viso/power point drawings will be made. I was just thinking how good It would have been to have a proper block diagram with good checklists.
I started work on the PIC control circuitry, hooked up the LCD and testing out some A/D -> LCD. I asked my wife if I could select my xmas present, and she said YES… so I ordered an ICD3 PIC programmer. I have been wanting to build or buy a ICSP programmer so I can fully apply my trial and error method of programming
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Will you post here your PIC control circuitry and protect ciruit?
Yes – I’m actually designing them at the moment, just did temperature sensing, LCD output and now working on the REF/FWD sensor. It’s going quite well, just got some help from some math guys at work with making the measurement from the pickup into a linear output, as the readout of from the sensor was not linear. That is from using the “simple” diode pickup without correcting for linearity in the diode.