MY QSL CARD , 

How i made my card from a flight video .

we Have a big landmark here in Wales , its the two bridges that cross the Severn Estuary .

i grabbed a frame from the video to produce my QSL card.

 

I have been experimenting with UAV and remote flying for a number of years , done some world record on distances , this fligt was over an hour and covers over 25 miles , It was an autonomous  filming the video ih hi res.

https://www.dropbox.com/s/66n960oosiaq38s/2nd%20crossing%20fast%20edit%20.mp4?dl=0

have a look at the video

 Problems with the W6PQL 70 CM 1KW amp.

The amp that I built has developed a problem on one of the LDMOS devices,

 

this has resulted in one of the device failing .

After inspection I found the case of the device had been chipped , so not sure if something dropped on it to cause it to then fail.

 

After trying to power it up have the Magic smoke off the device , confirming it was a gonner for sure.

problem with these device when we built it , the device is flow soldered onto the heat spreader, so it will all have to be removed and de soldered without affection the other good device .

 

After looking around i found  another pallet LDMOS from Italab

This is a 1kw Pallet , running off 50v at around 40 amps , si i may well just remove the problem amp in my Cased unit and fit one of these instead.