>
>> >>Reducing drive power from an exciter does not always make things
>> >better. Quite often it actually makes things worse.
>
>> For example, the ARRL expanded test report clearly shows the 1000MP is
>> very clean on output until you reach 25 watts and below.
>>
>> Bill K1XT
>
> That's right, my IC-751's get worse at low power. I find that a
>common trait in systems with solid state amplifiers.
>
>In the case of the 751A, changed driver transistors and revising the
>bias system in the PA section cured the problems.
>
>I also see contestors (and others) are bumping up the internal
>power limit controls, like CB'ers do. That is really bad news, and so
>is use of audio equalizers to add bass response.
>
// Adding bass responce would put 3rd and 5th IMD products inside the
passband window. This would seemingly subract from the energy available
to generate side-splatter on those outside the window. Comments?
cheers
- R. L. Measures, 805.386.3734, AG6K, www.vcnet.com/measures.
end
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