Hi Dick, Very useful information and encouraging too that your TX is so similar to mine. I will try that resistor mod with my last few IRF520 FET's and I have now ordered a TUBE of IRF630's (200 volt
Dear Chris, I use four IRF520 FET's in parallel push pull class B in my transmitter. The FET's are run at 40 V. The gates are driven via a transformer. At first I suffered from blown FET's till I fou
Thanks for the advice Alan, It's looking like a higher voltage device may be the answer. My existing TX uses the same FET's but only runs at 24 volts. They may well be running right on their limit an
Thanks for the advice Jeff, All points noted. I must confess that all of the published designs seem to use a logic driver IC. I must be being awkward using an inductor :-( Maybe I'd better stick to a
