The PA FET's in my new home brew transmitter keep exploding !
I'm using push-pull IRF520's rated at 100 V Vds and my supply is 30
volts.
I am careful not to exceed the V gs.
The gates are driven with a toroidal transformer and the whole
circuit is just a scaled up version of my original TX, which works fine.
It generates healthy power into a 50 ohm dummy load but on
connection to the aerial circuit - bang !
The aerial system is identical to that used with the old TX !
Has anyone any ideas on what's causing the problem and how to cure
it ?
I'm running out of FET's and my nerves are somewhat frayed (shell
shock!)
73 Chris G3XIZ
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