[AMPS] 4CX400 Conversion of AM-6155

[John Lane]

Here are the results of my implementation of the 4CX400 in the144Mhz
conversion of the ) AM-6155.  
1)  10 watts yields 500 (supplies set for 240V)
2)  -44 volts bias yields 100 mA plate idling current
3)  Observed efficiency:  65%
3)  Bias voltage divider changes:  R14 = 15K, R16= 4.7K 
4)  Paralell C2 with C1 on bias board.  (These caps may need to be replaced
on many amps due to their age.  I suspect bias instability may be due to
these caps failing in some cases.)
E-mail direct for more details -- John Lane, W8KX

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