I have been building a 2M SSPA - final part in the puzzle has been the low pass
filter.
After building this filter, copied the design from W6PQL - but I have limited
resources here in TF land, so I don't have access to good PCB materials. But
the filter was measured using a mini VNA Pro analyser with good results. 1:1.2
SWR on the operating frequency and cuttoff starts around 150Mhz
well, after transmitting about 10s I noticed a drop in output power, I took the
cover off and aimed the camera while transmitting
This is what happened on youtube: https://www.youtube.com/watch?v=9lU3I3BgmkE
I suspect there is something else wrong, as this happened very fast 10-15s -
and solder melts!
Guess I will go and find teflon sheets and make my own capacitors with copper ;)
73, Benni TF3CY
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