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 Strange power level change!
When I tune up my Drake L7, I see the power slowly increase, almost like a capacitive action. I see it on the scope too. When I key down with a carrier, it will start at a low value and then rise to the correct output.
What could cause that?
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 Originally Posted by WA6MHZ
When I tune up my Drake L7, I see the power slowly increase, almost like a capacitive action. I see it on the scope too. When I key down with a carrier, it will start at a low value and then rise to the correct output.
What could cause that?
Does it do it on all bands???
What's going on with the plate current / voltage and the Grid current?
Input VSWR; does it change??
73,
Sue
AF6LJ
Conspiracy Theorists Are People
Who Question The Statements Made By Known Liars.
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Plate meter doesn't work. Does it on all bands
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Originally Posted by WA6MHZ
Plate meter doesn't work. Does it on all bands
What about your input VSWR?
Does it change as the amplifier is coming up to power?
The most obvious thing I would look at right off would be the antenna relay.
73,
Sue
AF6LJ
Conspiracy Theorists Are People
Who Question The Statements Made By Known Liars.
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Let us know what you find Pat.
73,
Sue
AF6LJ
Conspiracy Theorists Are People
Who Question The Statements Made By Known Liars.
-
I notice it doesn't seem to happen on a Dummy load!
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Well, that's telltale isn't it? What is the antenna?
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Originally Posted by WA6MHZ
I notice it doesn't seem to happen on a Dummy load!
Now the problem is simple to find.
At least isn't in the amplifier.
73,
Sue
AF6LJ
Conspiracy Theorists Are People
Who Question The Statements Made By Known Liars.
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