The ALC board is part of the High Pass Filter module. You will find the schematic on page 2-80. The inputs are clearly labeled. ALC photo is page 2-73. There is a very early ALC board that is a little different but I have only heard of one confirmed in the field so I have no data on when the final version was put in production.
73
-Jim
NU0C
On Mon, 12 Feb 2024 07:58:28 -0800
"Bill NZ0T" <nz0tham@...> wrote:
I am attempying to do the wattmeter null adjustment.? The service manual that I downloded from the files section says to connect a VTVM to the refected power input on the ALC board (see section 2-15).? I have read the description of the ALC board there several times but I can't figure out where that input is.? There is no schematic or photo of the board that I can look at - maybe a page is missing?? Anyone know where that point is on the ALC board?
73, Bill NZ0T
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73
-Jim
NU0C
Jim Shorney