[Amps] 3CX3000 input impedence

[Bill Turner]

ORIGINAL MESSAGE:

At 10:39 AM 2/27/2006, Conrad_G0RUZ wrote:
>I think that keeping the loaded Q to between 12 and 15 will be extremely
>difficult with a 3CX3000A7 at 50 MHz due to stray C.

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There is another way.

Check any recent ARRL handbook in the section about amplifier design. 
You can create a simple L network with the addition of one small coil 
between the anode and the input to the pi network and that will solve 
the problem. I used that technique when modifying a Heath SB-1000 for 
six meters so I could use the original tuning and loading capacitors. 
Works like a charm.

73, Bill W6WRT