Hmmm. Where to begin...
Yes, removing L15 demonstrated the MOSFET was turned on at the time - why? Check for the ON voltage at the Gate - because if you do like most people would do, and set "gate" to be 3.6 volts
Please don't...MOSFET's are not all built the same way...
I see you're trying to use something from earlier - and I think you're using this...
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That is a screenshot, but it looks like you're trying to fabricate a part from EKL - using Discrete...
The 330 ohm kinda shows this...
So what values are you using and why?
Secondly...
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You used way too much "goo"
There are several types of this Goo - Heat Sink Compound - floating around and with it lathered on like, even the non-conductive type can provide D8 that shorting path thru this stuff because of too much applied to the back and Tab of that TO-220 then pressed in and bolted to a conductive surface - I'll leave that there...
Got to pull it (MOSFET) off, clean it up and use a little less
That goo, it can conduct - you may want to find a different brand of it. One that is truly the paste designed for TO-220.
Let's start over...
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Can't use R56 and L22 like that - this is an MOSFET not a Bipolar.
If you decide to go the Route of EKL conversion - be careful with the part selection...
The part values will change as the LOT numbers of each processing lot is done - their Gate Trigger ON voltage will change.
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In the above Graphic, R2 and R3 will change - so what you want to look at is the output power of the radio starting small (4 watts). Makes R2 LOWER in ohmic value and R3 even lower
These conversions - so these MOSFET will pass DC just as easily by LATCHING on and taking out D8 trying to suck power out of the radio to produce RF and DC - it's full spectrum ...
