[AMPS] gu84b in 6 meter problem

[alfredo@cln.it (Alfredo Rosati I5UXJ)]

I have constructed an amplifier in hf with the gu84b tube .
  It works perfectly. 
 I have tried to replace the input and output in order to come to an
agreement it in 50 mega.  
The problem is the begins to slide current of g1 just at to low power.
Someone can get me any suggestions? 
it is regular  at the increase of frequency the tube begins to make to
slide current of g1?
73 i5uxj

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