[Amps] AL811, AL811H or AL572 mods to 6m

[Bill Turner]

ORIGINAL MESSAGE:

On Wed, 2 Aug 2006 07:16:08 -0700, you wrote:


>Or Heathkit SB-1000. Same amplifier as the AL-80A.
>
>73
>Jim W7RY

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Many people change the tune and load capacitors when converting one of
these to six meters, but that is totally unnecessary. Adding a simple
coil between anode and tank creates an L-network which does the needed
impedance transformation so you can use the original capacitors. This
technique is covered in any recent ARRL handbook.

Email me if you'l like pictures of mine. 

Bill, W6WRT