[Amps] Quad Tube 4cx800 hf amp

[Bill Turner]

ORIGINAL MESSAGE:

At 07:02 PM 5/25/2006, Will Matney wrote:

>You can add a small amount of inductance between the coupling caps 
>and Tune C to drop it thus making it a L-Pi circuit.

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This technique is discussed in detail in any recent ARRL handbook and 
works like a charm. I used it when converting a Heath SB-1000 to six 
meters and it allowed me to use the original tune and load 
capacitors. Highly recommended.

I disagree with Will's statement in one respect: You are not 
"dropping" anything, just using the extra C to create an L-network 
for impedance matching purposes. The original C is still there, just 
being used differently.

73, Bill W6WRT