Last week i collected all the video snippets i took during our contest activity in october 2010.
I used the Linux Opensource video software Openshot. Music comes from the band Phonotrash.
Have fun with the video…
In my last post i described that my FT-817 is somehow sensitive to output ripple of switched power supplies.
My problems were caused when using it together with my Alinco DM330 30Amps supply.
So i tried to have a look to it with an digital oscilloscope.
output spikes on DM330 power supply
It has to be said that this picture was taken without any load at the supplies output. My feeling is that these spikes are quite high with around 150mVpp. Within the FT-817 this seems not to be filtered much and causes spurious spectral lines with the distance of the supplies switching frequency.
Whe i opened the supply afterwards i somehow dissapointed. The soldering points are really bad and seem to almost disappear at some parts. This makes me doubt that all the parts are correctly soldered. Maybe thats the reason for the ripple. This has to be investigated. I will not use the supply until that is clear.
Also you have to be carefull with the 100V/230V input voltage range switch. Do NOT switch it to 100V for accident.