Hello Gentleman,
I just built an amp what using a pair 4CX250B, it covers 1.8-54MHz ,grid driven .Working seems not too bad.I want to add more 4CX240Bs( 3 or 4X 4CX250B), for more power,but I'm afraid it will self-oscillation in top band.Could someone can tell me how to add neutralizting circuit in no-turned grid driven?Which is better?
Thanks for advance!
73!Hsu