[Amps] 4CX250B neutraliztion

["Hsu" <hsu4qro@gmail.com>]

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
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